corpus_id stringlengths 3 9 | arxiv_id stringlengths 9 16 | date stringdate 1989-10-26 00:00:00 2024-09-30 00:00:00 | title stringlengths 4 240 | abstract stringlengths 3 3.15k | categories listlengths 1 10 | topics listlengths 0 15 ⌀ | roles listlengths 1 4 | key_references listlengths 0 10 ⌀ | authors listlengths 1 5.28k ⌀ | citation_trajectory listlengths 14 26 ⌀ |
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17809033 | 1102.0236 | 2011-02-01 | Vanishing geodesic distance for the Riemannian metric with geodesic equation the KdV-equation | The Virasoro-Bott group endowed with the right-invariant $L^2$-metric (which is a weak Riemannian metric) has the KdV-equation as geodesic equation. We prove that this metric space has vanishing geodesic distance. | [
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... | null |
7068622 | 1102.0204 | 2011-02-01 | Repairing Multiple Failures with Coordinated and Adaptive Regenerating Codes | Erasure correcting codes are widely used to ensure data persistence in distributed storage systems. This paper addresses the simultaneous repair of multiple failures in such codes. We go beyond existing work (i.e., regenerating codes by Dimakis et al.) by describing (i) coordinated regenerating codes (also known as coo... | [
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"name": "Gilles Straub",
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118580678 | 1102.0044 | 2011-02-01 | The Abundance Scatter in M33 from HII Regions: Is There Any Evidence for Azimuthal Metallicity Variations? | Optical spectra of 25 H II regions in the inner two kpc of the M33 disk have been obtained with the GMOS spectrograph at the Gemini North telescope. The oxygen abundance gradient measured from the detection of the [O III]4363 auroral line displays a scatter of approximately 0.06 dex, a much smaller value than recently ... | [
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118338842 | 1102.0056 | 2011-02-01 | An Improved Spectroscopic Analysis of DA White Dwarfs from the Sloan Digital Sky Survey Data Release 4 | We present an improved spectroscopic and photometric analysis of hydrogen-line DA white dwarfs from the Sloan Digital Sky Survey Data Release 4 based on model atmospheres that include improved Stark broadening profiles with non-ideal gas effects. We also perform a careful visual inspection of all spectroscopic fits wit... | [
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] | null | [
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119697369 | 1102.0217 | 2011-02-01 | The Seneta--Heyde scaling for the branching random walk | We consider the boundary case (in the sense of Biggins and Kyprianou [Electron. J. Probab. 10 (2005) 609--631] in a one-dimensional super-critical branching random walk, and study the additive martingale $(W_n)$. We prove that, upon the system's survival, $n^{1/2}W_n$ converges in probability, but not almost surely, to... | [
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16526685 | 1102.0166 | 2011-02-01 | Hebbian learning of recurrent connections: a geometrical perspective | We show how a Hopfield network with modifiable recurrent connections undergoing slow Hebbian learning can extract the underlying geometry of an input space. First, we use a slow/fast analysis to derive an averaged system whose dynamics derives from an energy function and therefore always converges to equilibrium points... | [
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15590747 | 1102.0267 | 2011-02-01 | The Capacity Region of the MIMO Interference Channel and its Reciprocity to Within a Constant Gap | The capacity region of the 2-user multi-input multi-output (MIMO) Gaussian interference channel (IC) is characterized to within a constant gap that is independent of the channel matrices for the general case of the MIMO IC with an arbitrary number of antennas at each node. An achievable rate region and an outer bound t... | [
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118547587 | 1102.0307 | 2011-02-01 | Tunable coupling between three qubits as a building block for a superconducting quantum computer | Large scale quantum computers will consist of many interacting qubits. In this paper we expand the two flux qubit coupling scheme first devised in [Phys. Rev. B {\bf 70}, 140501 (2004)] and realized in [Science {\bf 314}, 1427 (2006)] to a three-qubit, two-coupler scenario. We study L-shaped and line-shaped coupler geo... | [
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"author_id": "a fowler_2",
"name": "Austin [\"G.\"] Fowler",
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118357504 | 1102.0303 | 2011-02-01 | Observing Evolution in the Supergranular Length Scale During Periods of Low Solar Activity | We present the initial results of an observational study into the variation of the dominant length-scale of quiet solar emission: supergranulation. This length-scale reflects the radiative energy in the plasma of the upper solar chromosphere and transition region at the magnetic network boundaries forming as a result o... | [
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7764471 | 1102.0160 | 2011-02-01 | Optimal Band Allocation for Cognitive Cellular Networks | FCC new regulation for cognitive use of the TV white space spectrum provides a new means for improving traditional cellular network performance. But it also introduces a number of technical challenges. This letter studies one of the challenges, that is, given the significant differences in the propagation property and ... | [
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"author_id": "x chen_175",
"name": "Xiao Chen",
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"author_id": "m wang_233",
"name": "Michael [\"Mao\"] Wang",
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13978813 | 1102.0316 | 2011-02-01 | Partition Functions of Normal Factor Graphs | One of the most common types of functions in mathematics, physics, and engineering is a sum of products, sometimes called a partition function. After "normalization," a sum of products has a natural graphical representation, called a normal factor graph (NFG), in which vertices represent factors, edges represent intern... | [
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118374336 | 1102.0280 | 2011-02-01 | Using M Dwarf Spectra to Map Extinction in the Local Galaxy | We use spectra of more than 56,000 M dwarfs from the Sloan Digital Sky Survey (SDSS) to create a high-latitude extinction map of the local Galaxy. Our technique compares spectra from the stars in the SDSS Data Release 7 M dwarf sample in low-extinction lines of sight, as determined by Schlegel, Finkbeiner, & Davis, to ... | [
"astro-ph.GA"
] | null | [
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9140451 | gr-qc/0306052 | 2011-02-02 | The motion of point particles in curved spacetime | This review is concerned with the motion of a point scalar charge, a point electric charge, and a point mass in a specified background spacetime. In each of the three cases the particle produces a field that behaves as outgoing radiation in the wave zone, and therefore removes energy from the particle. In the near zone... | [
"gr-qc"
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55617722 | 1102.0405 | 2011-02-02 | New estimators of the Pickands dependence function and a test for extreme-value dependence | We propose a new class of estimators for Pickands dependence function which is based on the concept of minimum distance estimation. An explicit integral representation of the function $A^*(t)$, which minimizes a weighted $L^2$-distance between the logarithm of the copula $C(y^{1-t},y^t)$ and functions of the form $A(t)... | [
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25227222 | 1102.0562 | 2011-02-02 | KOI-126: A Triply-Eclipsing Hierarchical Triple with Two Low-Mass Stars | The Kepler spacecraft has been monitoring the light from 150,000 stars in its primary quest to detect transiting exoplanets. Here we report on the detection of an eclipsing stellar hierarchical triple, identified in the Kepler photometry. KOI-126 (A,(B, C)), is composed of a low-mass binary (masses M_B = 0.2413+/-0.003... | [
"astro-ph.SR"
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119240041 | 1102.0508 | 2011-02-02 | The Planets around the Post-Common Envelope Binary NN Serpentis | We have detected 2 circumbinary planets around the close binary system NN Serpentis using the orbital time delay effect measured via the sharp eclipses of the white dwarf primary. The present pre-cataclysmic binary was formed when the original - 2 M primary expanded into a red giant, causing the secondary star to drop ... | [
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"author_id": "k beuermann_1",
"name": "Klaus Beuermann",
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118472942 | 1102.0544 | 2011-02-02 | Transit Timing Observations from Kepler: I. Statistical Analysis of the First Four Months | The architectures of multiple planet systems can provide valuable constraints on models of planet formation, including orbital migration, and excitation of orbital eccentricities and inclinations. NASA's Kepler mission has identified 1235 transiting planet candidates (Borcuki et al 2011). The method of transit timing v... | [
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"name": "Jason [\"F.\"] Rowe",
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31971702 | 1102.0435 | 2011-02-02 | Lattice polygons and families of curves on rational surfaces | First we solve the problem of finding minimal degree families on toric surfaces by reducing it to lattice geometry. Then we describe how to find minimal degree families on, more generally, rational complex projective surfaces. | [
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10370459 | 1102.0522 | 2011-02-02 | Uncertainty Relations and Sparse Signal Recovery for Pairs of General Signal Sets | We present an uncertainty relation for the representation of signals in two different general (possibly redundant or incomplete) signal sets. This uncertainty relation is relevant for the analysis of signals containing two distinct features each of which can be described sparsely in a suitable general signal set. Furth... | [
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"name": "Giuseppe Durisi",
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20954769 | 1102.0558 | 2011-02-02 | MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf | We report the discovery of a planet with a high planet-to-star mass ratio in the microlensing event MOA-2009-BLG-387, which exhibited pronounced deviations over a 12-day interval, one of the longest for any planetary event. The host is an M dwarf, with a mass in the range 0.07 M_sun < M_host < 0.49M_sun at 90% confiden... | [
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17261269 | 1102.0547 | 2011-02-02 | The Distribution of Transit Durations for Kepler Planet Candidates and Implications for their Orbital Eccentricities | Doppler planet searches have discovered that giant planets follow orbits with a wide range of orbital eccentricities, revolutionizing theories of planet formation. The discovery of hundreds of exoplanet candidates by NASA's Kepler mission enables astronomers to characterize the eccentricity distribution of small exopla... | [
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"author_id": "e ford_1",
"name": "Eric [\"B.\"] Ford",
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43095783 | 1102.0543 | 2011-02-02 | Architecture and Dynamics of Kepler's Candidate Multiple Transiting Planet Systems | About one-third of the ~1200 transiting planet candidates detected in the first four months of \ik data are members of multiple candidate systems. There are 115 target stars with two candidate transiting planets, 45 with three, 8 with four, and one each with five and six. We characterize the dynamical properties of the... | [
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12881010 | 1102.0566 | 2011-02-02 | Model Cortical Association Fields Account for the Time Course and Dependence on Target Complexity of Human Contour Perception | Can lateral connectivity in the primary visual cortex account for the time dependence and intrinsic task difficulty of human contour detection? To answer this question, we created a synthetic image set that prevents sole reliance on either low-level visual features or high-level context for the detection of target obje... | [
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"author_id": "m ham_1",
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119250819 | 1102.0342 | 2011-02-02 | Kepler Input Catalog: Photometric Calibration and Stellar Classification | We describe the photometric calibration and stellar classification methods used to produce the Kepler Input Catalog (KIC). The KIC is a catalog containing photometric and physical data for sources in the Kepler Mission field of view; it is used by the mission to select optimal targets. We derived atmospheric extinction... | [
"astro-ph.SR"
] | null | [
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] | null | null | null |
16624110 | 1102.0555 | 2011-02-02 | The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler | This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near infrared with Spitzer Space Telescope and at optical wavelengths by combining more than a year of Kepler photometry. T... | [
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] | null | [
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2948649 | 1102.0588 | 2011-02-02 | Adaptive Population Models for Offspring Populations and Parallel Evolutionary Algorithms | We present two adaptive schemes for dynamically choosing the number of parallel instances in parallel evolutionary algorithms. This includes the choice of the offspring population size in a (1+$\lambda$) EA as a special case. Our schemes are parameterless and they work in a black-box setting where no knowledge on the p... | [
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15233153 | 1102.0541 | 2011-02-02 | Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data | On 1 February 2011 the Kepler Mission released data for 156,453 stars observed from the beginning of the science observations on 2 May through 16 September 2009. There are 1235 planetary candidates with transit like signatures detected in this period. These are associated with 997 host stars. Distributions of the chara... | [
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] | null | [
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] | null | null | null |
24530618 | 1102.0483 | 2011-02-02 | Local Susceptibility of the Yb2Ti2O7 Rare Earth Pyrochlore Computed from a Hamiltonian with Anisotropic Exchange | The rare earth pyrochlore magnet Yb2Ti2O7 is among a handful of materials that apparently exhibit no long range order down to the lowest explored temperatures and well below the Curie-Weiss temperature. Paramagnetic neutron scattering on a single crystal sample has revealed the presence of anisotropic correlations and ... | [
"cond-mat.stat-mech",
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] | null | [
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] | null | null | null |
98280452 | 1102.0488 | 2011-02-02 | Cation vacancy order in the K0.8+xFe1.6-ySe2 system: five-fold cell expansion accommodates 20% tetrahedral vacancies | Ordering of the tetrahedral site vacancies in two crystals of refined compositions K0.93(1)Fe1.52(1)Se2 and K0.862(3)Fe1.563(4)Se2 produces a fivefold expansion of the parent ThCr2Si2 unit cell in the ab plane which can accommodate 20% vacancies on a single site within the square FeSe layer. The iron charge state is ma... | [
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{
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"name": "Alexey [\"Y.\"] Ganin",
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... | null |
59436300 | 1102.0440 | 2011-02-02 | Towards a derivation of holographic entanglement entropy | We provide a derivation of holographic entanglement entropy for spherical entangling surfaces. Our construction relies on conformally mapping the boundary CFT to a hyperbolic geometry and observing that the vacuum state is mapped to a thermal state in the latter geometry. Hence the conformal transformation maps the ent... | [
"hep-th",
"gr-qc"
] | null | [
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117957680 | 1102.0584 | 2011-02-02 | Optimal control methods for fast time-varying Hamiltonians | In this article, we develop a numerical method to find optimal control pulses that accounts for the separation of timescales between the variation of the input control fields and the applied Hamiltonian. In traditional numerical optimization methods, these timescales are treated as being the same. While this approximat... | [
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{
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"author_id": "j gambetta_1",
"name": "Jay [\"M.\"] Gambetta",
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13908685 | 1102.0615 | 2011-02-03 | Electromediated formation of DNA complexes with cell membranes and its consequences for gene delivery | Electroporation is a physical method to induce the uptake of therapeutic drugs and DNA, by eukaryotic cells and tissues. The phenomena behind electro-mediated membrane permeabilization to plasmid DNA have been shown to be significantly more complex than those for small molecules. Small molecules cross the permeabilized... | [
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{
"author_id": "j escoffre_1",
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"author_id": "t portet_1",
"name": "Thomas Portet",
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25977661 | 1102.0732 | 2011-02-03 | Systematic coarse-graining of the dynamics of entangled polymer melts: the road from chemistry to rheology | For optimal processing and design of entangled polymeric materials it is important to establish a rigorous link between the detailed molecular composition of the polymer and the viscoelastic properties of the macroscopic melt. We review current and past computer simulation techniques and critically assess their ability... | [
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119591496 | 1102.0662 | 2011-02-03 | The tamed Milstein method for commutative stochastic differential equations with non-globally Lipschitz continuous coefficients | For stochastic differential equations (SDEs) with a superlinearly growing and globally one-sided Lipschitz continuous drift coefficient, the classical explicit Euler scheme fails to converge strongly to the exact solution. Recently, an explicit strongly convergent numerical scheme, called the tamed Euler method, is pro... | [
"math.NA",
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] | null | [
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] | null | null | null |
2074996 | 1102.0603 | 2011-02-03 | Persistent Robotic Tasks: Monitoring and Sweeping in Changing Environments | We present controllers that enable mobile robots to persistently monitor or sweep a changing environment. The changing environment is modeled as a field which grows in locations that are not within range of a robot, and decreases in locations that are within range of a robot. We assume that the robots travel on given c... | [
"cs.RO",
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] | null | [
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16805855 | 1102.0608 | 2011-02-03 | Calculation of the Voronoi boundary for lens-shaped particles and spherocylinders | We have recently developed a mean-field theory to estimate the packing fraction of non-spherical particles [A. Baule et al., Nature Commun. (2013)]. The central quantity in this framework is the Voronoi excluded volume, which generalizes the standard hard-core excluded volume appearing in Onsager's theory. The Voronoi ... | [
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{
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"author_id": "m danisch_1",
"name": "Maximilien Danisch",
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16979409 | 1102.0730 | 2011-02-03 | Approximation of slow and fast dynamics in multiscale dynamical systems by the linearized Relaxation Redistribution Method | In this paper, we introduce a fictitious dynamics for describing the only fast relaxation of a stiff ordinary differential equation (ODE) system towards a stable low-dimensional invariant manifold in the phase-space (slow invariant manifold - SIM). As a result, the demanding problem of constructing SIM of any dimension... | [
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88511890 | 1102.0630 | 2011-02-03 | Improving PSF calibration in confocal microscopic imaging---estimating and exploiting bilateral symmetry | A method for estimating the axis of reflectional symmetry of an image $f(x,y)$ on the unit disc $D=\{(x,y):x^2+y^2\leq1\}$ is proposed, given that noisy data of $f(x,y)$ are observed on a discrete grid of edge width $\Delta$. Our estimation procedure is based on minimizing over $\beta\in[0,\pi)$ the $L_2$ distance betw... | [
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55059000 | 1102.0605 | 2011-02-03 | KEPLER's First Rocky Planet: Kepler-10b | NASA's Kepler Mission uses transit photometry to determine the frequency of earth-size planets in or near the habitable zone of Sun-like stars. The mission reached a milestone toward meeting that goal: the discovery of its first rocky planet, Kepler-10b. Two distinct sets of transit events were detected: 1) a 152 +/- 4... | [
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784242 | 1102.0844 | 2011-02-04 | A convex model for non-negative matrix factorization and dimensionality reduction on physical space | A collaborative convex framework for factoring a data matrix $X$ into a non-negative product $AS$, with a sparse coefficient matrix $S$, is proposed. We restrict the columns of the dictionary matrix $A$ to coincide with certain columns of the data matrix $X$, thereby guaranteeing a physically meaningful dictionary and ... | [
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786929 | 1102.1036 | 2011-02-04 | Transit Analysis Package (TAP and autoKep): IDL Graphical User Interfaces for Extrasolar Planet Transit Photometry | We present an IDL graphical user interface-driven software package designed for the analysis of extrasolar planet transit light curves. The Transit Analysis Package (TAP) software uses Markov Chain Monte Carlo (MCMC) techniques to fit light curves using the analytic model of Mandel and Agol (2002). The package incorpor... | [
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119333827 | 1102.0998 | 2011-02-04 | Rough Paths on Manifolds | We develop a fundamental framework for and extend the theory of rough paths to Lipschitz-gamma manifolds. | [
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"name": "Christian Litterer",
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119608766 | 1102.0842 | 2011-02-04 | Automorphic Equivalence within Gapped Phases of Quantum Lattice Systems | Gapped ground states of quantum spin systems have been referred to in the physics literature as being `in the same phase' if there exists a family of Hamiltonians H(s), with finite range interactions depending continuously on $s \in [0,1]$, such that for each $s$, H(s) has a non-vanishing gap above its ground state and... | [
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6272515 | 1102.0919 | 2011-02-04 | A Self-learning Algebraic Multigrid Method for Extremal Singular Triplets and Eigenpairs | A self-learning algebraic multigrid method for dominant and minimal singular triplets and eigenpairs is described. The method consists of two multilevel phases. In the first, multiplicative phase (setup phase), tentative singular triplets are calculated along with a multigrid hierarchy of interpolation operators that a... | [
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55415282 | 1102.1014 | 2011-02-04 | Interpreting large-scale redshift-space distortion measurements | The simplest theory describing large-scale redshift-space distortions (RSD), based on linear theory and distant galaxies, depends on the growth of cosmological structure, suggesting that strong tests of General Relativity can be constructed from galaxy surveys. As data sets become larger and the expected constraints mo... | [
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] | null | [
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10149641 | 1102.1101 | 2011-02-05 | Total variation regularization for fMRI-based prediction of behaviour | While medical imaging typically provides massive amounts of data, the extraction of relevant information for predictive diagnosis remains a difficult challenge. Functional MRI (fMRI) data, that provide an indirect measure of task-related or spontaneous neuronal activity, are classically analyzed in a mass-univariate pr... | [
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"name": "Alexandre Gramfort",
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1273523 | 1102.1107 | 2011-02-05 | Robust Distributed Routing in Dynamical Flow Networks - Part I: Locally Responsive Policies and Weak Resilience | Robustness of distributed routing policies is studied for dynamical flow networks, with respect to adversarial disturbances that reduce the link flow capacities. A dynamical flow network is modeled as a system of ordinary differential equations derived from mass conservation laws on a directed acyclic graph with a sing... | [
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"name": "Ketan Savla",
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4811380 | 1102.1179 | 2011-02-06 | Generalized second Bargmann transforms associated with the hyperbolic Landau levels on the Poincar\'e disk | We deal with a family of generalized coherent states associated to the hyperbolic Landau levels of the Schr\"odinger operator with uniform magnetic field on the Poincar\'e disk. Their associated coherent state transforms constitute a class of generalized second Bargmann transforms. | [
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45067992 | 1102.1191 | 2011-02-06 | Smoothed log-concave maximum likelihood estimation with applications | We study the smoothed log-concave maximum likelihood estimator of a probability distribution on $\mathbb{R}^d$. This is a fully automatic nonparametric density estimator, obtained as a canonical smoothing of the log-concave maximum likelihood estimator. We demonstrate its attractive features both through an analysis of... | [
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"name": "Richard [\"J.\"] Samworth",
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15379883 | 1102.1173 | 2011-02-06 | Multi-Parameter Tikhonov Regularization | We study multi-parameter Tikhonov regularization, i.e., with multiple penalties. Such models are useful when the sought-for solution exhibits several distinct features simultaneously. Two choice rules, i.e., discrepancy principle and balancing principle, are studied for choosing an appropriate (vector-valued) regulariz... | [
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28394561 | 1102.1204 | 2011-02-06 | Large Scale Correlation Screening | This paper treats the problem of screening for variables with high correlations in high dimensional data in which there can be many fewer samples than variables. We focus on threshold-based correlation screening methods for three related applications: screening for variables with large correlations within a single trea... | [
"stat.ML"
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] | null | null | null |
18399723 | 1102.1182 | 2011-02-06 | Phase transition in the detection of modules in sparse networks | We present an asymptotically exact analysis of the problem of detecting communities in sparse random networks. Our results are also applicable to detection of functional modules, partitions, and colorings in noisy planted models. Using a cavity method analysis, we unveil a phase transition from a region where the origi... | [
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"name": "Florent Krzakala",
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17015951 | 1102.1313 | 2011-02-07 | Introduction to Categories and Categorical Logic | The aim of these notes is to provide a succinct, accessible introduction to some of the basic ideas of category theory and categorical logic. The notes are based on a lecture course given at Oxford over the past few years. They contain numerous exercises, and hopefully will prove useful for self-study by those seeking ... | [
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] | null | [
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] | null | null | null |
8538144 | 1102.1273 | 2011-02-07 | One to Rule Them All: a General Randomized Algorithm for Buffer Management with Bounded Delay | We give a memoryless scale-invariant randomized algorithm for the Buffer Management with Bounded Delay problem that is e/(e-1)-competitive against an adaptive adversary, together with better performance guarantees for many restricted variants, including the s-bounded instances. In particular, our algorithm attains the ... | [
"cs.DS"
] | null | [
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] | null | null | null |
53621394 | 1102.1358 | 2011-02-07 | Van der Waals density functionals applied to solids | The van der Waals density functional (vdW-DF) of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)] is a promising approach for including dispersion in approximate density functional theory exchange-correlation functionals. Indeed, an improved description of systems held by dispersion forces has been demonstrated in the ... | [
"cond-mat.mtrl-sci"
] | null | [
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] | null | null | null |
4852477 | 1102.1503 | 2011-02-07 | Peer-to-Peer Multimedia Sharing based on Social Norms | Empirical data shows that in the absence of incentives, a peer participating in a Peer-to-Peer (P2P) network wishes to free-riding. Most solutions for providing incentives in P2P networks are based on direct reciprocity, which are not appropriate for most P2P multimedia sharing networks due to the unique features exhib... | [
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"name": "Mihaela [\"van\",\"der\"] Schaar",
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28052759 | 1102.1244 | 2011-02-07 | A proof of equivalence between level lines shortening and curvature motion in image processing | In this paper we define the continuous Level Lines Shortening evolution of a two-dimensional image as the Curve Shortening operator acting simultaneously and independently on all the level lines of the initial data, and show that it computes a viscosity solution for the mean curvature motion. This provides an exact ana... | [
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{
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"author_id": "j morel_3",
"name": "Jean-Michel Morel",
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119264510 | 1102.1270 | 2011-02-07 | The solar magnetic field since 1700: II. Physical reconstruction of total, polar and open flux | We have used semi-synthetic records of emerging sunspot groups based on sunspot number data as input for a surface flux transport model to reconstruct the evolution of the large-scale solar magnetic field and the open heliospheric flux from the year 1700 onward. The statistical properties of the semi-synthetic sunspot ... | [
"astro-ph.SR"
] | null | [
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] | null | null | null |
2765255 | 1102.1402 | 2011-02-07 | Trends in Social Media : Persistence and Decay | Social media generates a prodigious wealth of real-time content at an incessant rate. From all the content that people create and share, only a few topics manage to attract enough attention to rise to the top and become temporal trends which are displayed to users. The question of what factors cause the formation and p... | [
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] | null | [
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"author_id": "b huberman_1",
"name": "Bernardo [\"A.\"] Huberman",
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16907816 | 1102.1523 | 2011-02-07 | The NumPy array: a structure for efficient numerical computation | In the Python world, NumPy arrays are the standard representation for numerical data. Here, we show how these arrays enable efficient implementation of numerical computations in a high-level language. Overall, three techniques are applied to improve performance: vectorizing calculations, avoiding copying data in memory... | [
"cs.MS"
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{
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{
"author_id": "e s. chris colbert_0",
"name": "Enthought [\"Usa\"] S. Chris Colbert",
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... | null |
14836280 | 1102.1378 | 2011-02-07 | There is no variational characterization of the cycles in the method of periodic projections | The method of periodic projections consists in iterating projections onto $m$ closed convex subsets of a Hilbert space according to a periodic sweeping strategy. In the presence of $m\geq 3$ sets, a long-standing question going back to the 1960s is whether the limit cycles obtained by such a process can be characterize... | [
"math.FA"
] | null | [
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] | null | null | null |
119125178 | 1102.1473 | 2011-02-07 | Bikei, Involutory Biracks and unoriented link invariants | We identify a subcategory of biracks which define counting invariants of unoriented links, which we call involutory biracks. In particular, involutory biracks of birack rank N=1 are biquandles, which we call bikei. We define counting invariants of unoriented classical and virtual links using finite involutory biracks, ... | [
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] | null | [
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{
"author_id": "s aksoy_1",
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"author_id": "s nelson_3",
"name": "Sam Nelson",
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... | null |
59025628 | 1102.1312 | 2011-02-07 | Mixed Tate motives over $\Z$ | We prove that the category of mixed Tate motives over $\Z$ is spanned by the motivic fundamental group of $\Pro^1$ minus three points. We prove a conjecture by M. Hoffman which states that every multiple zeta value is a $\Q$-linear combination of $\zeta(n_1,..., n_r)$ where $n_i\in \{2,3\}$. | [
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"math.NT"
] | null | [
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] | null | null | null |
118630904 | 1102.1437 | 2011-02-07 | The Halo Occupation Distribution of Black Holes: Dependence on Mass | We investigate the halo occupation distribution (HOD) of black holes within a hydrodynamic cosmological simulation that directly follows black hole growth. Similar to the HOD of galaxies/subhalos, we find that the black hole occupation number can be described by the form N_BH proportional to 1+ (M_Host)^alpha where alp... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2584335 | 1102.1446 | 2011-02-07 | Maximally Star-Forming Galactic Disks I. Starburst Regulation Via Feedback-Driven Turbulence | Star formation rates in the centers of disk galaxies often vastly exceed those at larger radii. We investigate the idea that these central starbursts are self-regulated, with the momentum flux injected to the ISM by star formation balancing the gravitational force confining the gas. For most starbursts, supernovae are ... | [
"astro-ph.CO",
"astro-ph.GA"
] | null | [
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] | null | null | null |
3134907 | 1102.1249 | 2011-02-07 | Compressible Distributions for High-dimensional Statistics | We develop a principled way of identifying probability distributions whose independent and identically distributed (iid) realizations are compressible, i.e., can be well-approximated as sparse. We focus on Gaussian random underdetermined linear regression (GULR) problems, where compressibility is known to ensure the su... | [
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{
"author_id": "r gribonval_1",
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"author_id": "v cevher_1",
"name": "Volkan Cevher",
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45385573 | 1102.1375 | 2011-02-07 | WASP-39b: a highly inflated Saturn-mass planet orbiting a late G-type star | We present the discovery of WASP-39b, a highly inflated transiting Saturn-mass planet orbiting a late G-type dwarf star with a period of $4.055259 \pm 0.000008$\,d, Transit Epoch T$_{0}=2455342.9688\pm0.0002$\,(HJD), of duration $0.1168 \pm 0.0008$\,d. A combined analysis of the WASP photometry, high-precision follow-u... | [
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] | null | [
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] | null | null | null |
119220988 | 1102.1487 | 2011-02-07 | Rumor Evolution in Social Networks | Social network is a main tunnel of rumor spreading. Previous studies are concentrated on a static rumor spreading. The content of the rumor is invariable during the whole spreading process. Indeed, the rumor evolves constantly in its spreading process, which grows shorter, more concise, more easily grasped and told. In... | [
"physics.soc-ph",
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] | null | [
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{
"author_id": "y zhang_145",
"name": "Yichao Zhang",
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{
"author_id": "s zhou_80",
"name": "Shi Zhou",
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"num_... | null |
2737980 | 1102.1472 | 2011-02-07 | Algorithms for Implicit Hitting Set Problems | A hitting set for a collection of sets is a set that has a non-empty intersection with each set in the collection; the hitting set problem is to find a hitting set of minimum cardinality. Motivated by instances of the hitting set problem where the number of sets to be hit is large, we introduce the notion of implicit h... | [
"cs.DS"
] | null | [
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{
"author_id": "k chandrasekaran_1",
"name": "Karthekeyan Chandrasekaran",
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{
"author_id": "r karp_1",
"name": "Richard [\"M.\"] Karp",
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"h_index": null,
... | null |
119268857 | 1102.1374 | 2011-02-07 | Thermal Segregation Beyond Navier-Stokes | A dilute suspension of impurities in a low density gas is described by the Boltzmann and Boltzman-Lorentz kinetic theory. Scaling forms for the species distribution functions allow an exact determination of the hydrodynamic fields, without restriction to small thermal gradients or Navier-Stokes hydrodynamics. The therm... | [
"cond-mat.stat-mech",
"cond-mat.soft"
] | null | [
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{
"author_id": "j javier brey_0",
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{
"author_id": "n khalil_1",
"name": "Nagi Khalil",
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"num_papers": null,... | null |
118358292 | 1102.1569 | 2011-02-08 | Equilibration and symmetry breaking in vibrated granular systems | The steady states of two vibrated granular gases separated by an adiabatic piston are investigated. The system exhibits a non-equilibrium phase transition with an spontaneous symmetry breaking. Even if the gases at both sides of the piston have the same number of particles and are mechanically identical, their steady v... | [
"cond-mat.stat-mech",
"cond-mat.soft"
] | null | [
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{
"author_id": "j brey_1",
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{
"author_id": "n khalil_1",
"name": "Nagi Khalil",
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"num_papers": null... | null |
16253041 | 1102.1678 | 2011-02-08 | Optimal bounds for quantum bit commitment | Bit commitment is a fundamental cryptographic primitive with numerous applications. Quantum information allows for bit commitment schemes in the information theoretic setting where no dishonest party can perfectly cheat. The previously best-known quantum protocol by Ambainis achieved a cheating probability of at most 3... | [
"quant-ph"
] | null | [
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{
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{
"author_id": "a chailloux_1",
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{
"author_id": "i kerenidis_1",
"name": "Iordanis Kerenidis",
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"num_paper... | null |
29441463 | 1102.1558 | 2011-02-08 | Minimum-weight perfect matching for non-intrinsic distances on the line | Consider a real line equipped with a (not necessarily intrinsic) distance. We deal with the minimum-weight perfect matching problem for a complete graph whose points are located on the line and whose edges have weights equal to distances along the line. This problem is closely related to one-dimensional Monge-Kantorovi... | [
"math.OC"
] | null | [
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] | [] | [
{
"author_id": "j delon_1",
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{
"author_id": "j salomon_1",
"name": "Julien Salomon",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
6912404 | 1102.1621 | 2011-02-08 | Recovery of Sparsely Corrupted Signals | We investigate the recovery of signals exhibiting a sparse representation in a general (i.e., possibly redundant or incomplete) dictionary that are corrupted by additive noise admitting a sparse representation in another general dictionary. This setup covers a wide range of applications, such as image inpainting, super... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118732901 | 1102.1571 | 2011-02-08 | Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies | The nearby universe remains the best laboratory to understand physical properties of galaxies and is a reference for any comparison with high redshift observations. The all sky (or very large) surveys performed from the ultraviolet (UV) to the far-infrared (far-IR) gives us large datasets with a very large wavelength c... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118472598 | 1102.1730 | 2011-02-08 | KOI-54: The Kepler Discovery of Tidally-Excited Pulsations and Brightenings in a Highly Eccentric Binary | Kepler observations of the star HD 187091 (KID 8112039, hereafter KOI-54) revealed a remarkable light curve exhibiting sharp periodic brightening events every 41.8 days with a superimposed set of oscillations forming a beating pattern in phase with the brightenings. Spectroscopic observations revealed that this is a bi... | [
"astro-ph.SR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119216046 | 1102.1721 | 2011-02-08 | Topological Entanglement Entropy of a Bose-Hubbard Spin Liquid | The Landau paradigm of classifying phases by broken symmetries was demonstrated to be incomplete when it was realized that different quantum Hall states could only be distinguished by more subtle, topological properties. Today, the role of topology as an underlying description of order has branched out to include topol... | [
"cond-mat.str-el",
"quant-ph"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "206329868",
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}
] | [
{
"author_id": "s isakov_1",
"name": "Sergei [\"V.\"] Isakov",
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"num_citations": null
},
{
"author_id": "m hastings_1",
"name": "Matthew [\"B.\"] Hastings",
"publication_history": null,
"h_index": null,
... | null |
16786689 | 1102.1507 | 2011-02-08 | Generalized Measures of Information Transfer | Transfer entropy provides a general tool for analyzing the magnitudes and directions---but not the \emph{kinds}---of information transfer in a system. We extend transfer entropy in two complementary ways. First, we distinguish state-dependent from state-independent transfer, based on whether a source's influence depend... | [
"physics.data-an",
"cs.IT",
"math.DS",
"math.IT"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14150330 | 1102.1753 | 2011-02-08 | Predictors of short-term decay of cell phone contacts in a large scale communication network | Under what conditions is an edge present in a social network at time t likely to decay or persist by some future time t + Delta(t)? Previous research addressing this issue suggests that the network range of the people involved in the edge, the extent to which the edge is embedded in a surrounding structure, and the age... | [
"cs.SI",
"physics.soc-ph",
"stat.ML"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "t raeder_0",
"name": "Troy Raeder",
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},
{
"author_id": "o lizardo_1",
"name": "Omar [\"Alcides\"] Lizardo",
"publication_history": null,
"h_index": null,
"num_papers... | null |
118485736 | 1102.1588 | 2011-02-08 | VST processing facility: first astronomical applications | VST--Tube is a new software package designed to process optical astronomical images. It is an automated pipeline to go from the raw exposures to fully calibrated co-added images, and to extract catalogs with aperture and PSF photometry. A set of tools allow the data administration and the quality check of the intermedi... | [
"astro-ph.IM"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1123450 | 1102.1544 | 2011-02-08 | A Constant Factor Approximation Algorithm for Boxicity of Circular Arc Graphs | Boxicity of a graph $G(V,E)$ is the minimum integer $k$ such that $G$ can be represented as the intersection graph of $k$-dimensional axis parallel rectangles in $\mathbf{R}^k$. Equivalently, it is the minimum number of interval graphs on the vertex set $V$ such that the intersection of their edge sets is $E$. It is kn... | [
"cs.DS",
"cs.DM",
"math.CO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a adiga_2",
"name": "Abhijin Adiga",
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},
{
"author_id": "j babu_1",
"name": "Jasine Babu",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num... | null |
30474460 | 1102.1852 | 2011-02-09 | Testing trivializing maps in the Hybrid Monte Carlo algorithm | We test a recent proposal to use approximate trivializing maps in a field theory to speed up Hybrid Monte Carlo simulations. Simulating the CP^{N-1} model, we find a small improvement with the leading order transformation, which is however compensated by the additional computational overhead. The scaling of the algorit... | [
"hep-lat"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
56471930 | 1102.1950 | 2011-02-09 | Regularity conditions in the realisability problem with applications to point processes and random closed sets | We study existence of random elements with partially specified distributions. The technique relies on the existence of a positive extension for linear functionals accompanied by additional conditions that ensure the regularity of the extension needed for interpreting it as a probability measure. It is shown in which ca... | [
"math.PR",
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118444969 | 1102.1992 | 2011-02-09 | Correlated Supernova Systematics and Ground Based Surveys | Supernova distances provide a direct probe of cosmic acceleration, constraining dark energy. This leverage increases with survey redshift depth at a rate bounded by the systematic uncertainties. We investigate the impact of a wavelength-dependent, global correlation model of systematics in comparison to the standard lo... | [
"astro-ph.CO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a kim_4",
"name": "Alex [\"G\"] Kim",
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},
{
"author_id": "e linder_1",
"name": "Eric [\"V.\"] Linder",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
263348367 | 1102.1853 | 2011-02-09 | The Geometry of Chaotic Dynamics -- A Complex Network Perspective | Recently, several complex network approaches to time series analysis have been developed and applied to study a wide range of model systems as well as real-world data, e.g., geophysical or financial time series. Among these techniques, recurrence-based concepts and prominently $\epsilon$-recurrence networks, most faith... | [
"nlin.CD"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "r donner_1",
"name": "Reik [\"V.\"] Donner",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "j heitzig_1",
"name": "Jobst Heitzig",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
1067591 | 1102.1808 | 2011-02-09 | From Machine Learning to Machine Reasoning | A plausible definition of "reasoning" could be "algebraically manipulating previously acquired knowledge in order to answer a new question". This definition covers first-order logical inference or probabilistic inference. It also includes much simpler manipulations commonly used to build large learning systems. For ins... | [
"cs.AI",
"cs.LG"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "l bottou_1",
"name": "Léon Bottou",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
45809302 | 1102.1915 | 2011-02-09 | A Unifying Statistical Model for Atmospheric Optical Scintillation | In this paper we develop a new statistical model for the irradiance fluctuations of an unbounded optical wavefront (plane and spherical waves) propagating through a turbulent medium under all irradiance fluctuation conditions in homogeneous, isotropic turbulence. The major advantage of the model is that leads to closed... | [
"physics.optics",
"physics.ao-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
31258419 | 1102.1822 | 2011-02-09 | Integral representations and properties of operator fractional Brownian motions | Operator fractional Brownian motions (OFBMs) are (i) Gaussian, (ii) operator self-similar and (iii) stationary increment processes. They are the natural multivariate generalizations of the well-studied fractional Brownian motions. Because of the possible lack of time-reversibility, the defining properties (i)--(iii) do... | [
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55840662 | 1102.1842 | 2011-02-09 | Central limit theorem for Markov processes with spectral gap in the Wasserstein metric | Suppose that $\{X_t,\,t\ge0\}$ is a non-stationary Markov process, taking values in a Polish metric space $E$. We prove the law of large numbers and central limit theorem for an additive functional of the form $\int_0^T\psi(X_s)ds$, provided that the dual transition probability semigroup, defined on measures, is strong... | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2696572 | 1102.1985 | 2011-02-09 | What Stops Social Epidemics? | Theoretical progress in understanding the dynamics of spreading processes on graphs suggests the existence of an epidemic threshold below which no epidemics form and above which epidemics spread to a significant fraction of the graph. We have observed information cascades on the social media site Digg that spread fast ... | [
"cs.SI",
"physics.soc-ph"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "5616545",
"num_citations": null
},
{
"corpus_id": "5414827",
"num_citations": null
}
] | [
{
"author_id": "g steeg_1",
"name": "Greg [\"Ver\"] Steeg",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "r ghosh_1",
"name": "Rumi Ghosh",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
118440288 | 1102.1967 | 2011-02-09 | QCD corrections to top quark pair production in association with a photon at hadron colliders | We compute QCD corrections to the production of a ttbar pair in association with a hard photon at the Tevatron and the LHC. This process allows a direct measurement of the top quark electromagnetic couplings that, at the moment, are only loosely constrained. We include top quark decays, treating them in the narrow widt... | [
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
31876570 | 1102.1996 | 2011-02-09 | Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science | The \emph{Wide-field Infrared Survey Explorer} has surveyed the entire sky at four infrared wavelengths with greatly improved sensitivity and spatial resolution compared to its predecessors, the \emph{Infrared Astronomical Satellite} and the \emph{Cosmic Background Explorer}. NASA's Planetary Science Division has funde... | [
"astro-ph.EP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
59928733 | 1102.1970 | 2011-02-09 | Dirichlet Higgs as radion stabilizer in warped compactification | We study implications of generalized non-zero Dirichlet boundary condition along with the ordinary Neumann one on a bulk scalar in the Randall-Sundrum warped compactification. First we show profiles of vacuum expectation value of the scalar under the general boundary conditions. We also investigate Goldberger-Wise mech... | [
"hep-ph",
"hep-th"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "13183017",
"num_citations": null
},
{
"corpus_id": "119184909",
"num_citations": null
},
{
"corpus_id": "37717744",
"num_citations": null
},
{
"corpus_id": "119112923",
"num_citations": null
},
{
"corpus_id": "118888806",
"num_citations": null
... | [
{
"author_id": "n haba_1",
"name": "Naoyuki Haba",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "k oda_1",
"name": "Kin-ya Oda",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_cit... | null |
1311675 | 1102.1947 | 2011-02-09 | Row products of random matrices | We define the row product of K matrices of size d by n as a matrix of size d^K by n, whose row are entry-wise products of rows of these matrices. This construction arises in certain computer science problems. We study the question, to which extent the spectral and geometric properties of the row product of independent ... | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
54219251 | 1102.1882 | 2011-02-09 | Study of neutrino interactions with the electronic detectors of the OPERA experiment | The OPERA experiment is based on a hybrid technology combining electronic detectors and nuclear emulsions. OPERA collected muon-neutrino interactions during the 2008 and 2009 physics runs of the CNGS neutrino beam, produced at CERN with an energy range of about 5-35 GeV. A total of $5.3 \times 10^{19}$ protons on targe... | [
"hep-ex"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "n agafonova_1",
"name": "Natalia Agafonova",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "a aleksandrov_1",
"name": "Andrei [\"B\"] Aleksandrov",
"publication_history": null,
"h_index": null,
... | null |
20751358 | 1102.1994 | 2011-02-09 | Occam's Quantum Razor: How Quantum Mechanics can reduce the complexity of classical models | Mathematical models are an essential component of quantitative science. They generate predictions about the future, based on information available in the present. In the spirit of Occam's razor, simpler is better; should two models make identical predictions, the one that requires less input is preferred. Yet, for almo... | [
"quant-ph",
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
8866987 | 1102.2041 | 2011-02-09 | Toward a Classification of Finite Partial-Monitoring Games | Partial-monitoring games constitute a mathematical framework for sequential decision making problems with imperfect feedback: The learner repeatedly chooses an action, opponent responds with an outcome, and then the learner suffers a loss and receives a feedback signal, both of which are fixed functions of the action a... | [
"cs.GT",
"stat.ML"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "a antos_0",
"name": "András Antos",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "g bartók_1",
"name": "Gábor Bartók",
"publication_history": null,
"h_index": null,
"num_papers": null,
"n... | null |
4212426 | 1102.1795 | 2011-02-09 | Local matching indicators for transport problems with concave costs | In this paper, we introduce a class of indicators that enable to compute efficiently optimal transport plans associated to arbitrary distributions of N demands and M supplies in R in the case where the cost function is concave. The computational cost of these indicators is small and independent of N. A hierarchical use... | [
"math.OC",
"math.CO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j delon_1",
"name": "Julie Delon",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "j salomon_1",
"name": "Julien Salomon",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
88512519 | 1102.1857 | 2011-02-09 | Nonparametric regression with filtered data | We present a general principle for estimating a regression function nonparametrically, allowing for a wide variety of data filtering, for example, repeated left truncation and right censoring. Both the mean and the median regression cases are considered. The method works by first estimating the conditional hazard funct... | [
"math.ST",
"stat.TH"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "o linton_1",
"name": "Oliver [\"B.\"] Linton",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "e mammen_1",
"name": "Enno Mammen",
"publication_history": null,
"h_index": null,
"num_papers": nu... | null |
488380 | 1102.1889 | 2011-02-09 | Ologs: a categorical framework for knowledge representation | In this paper we introduce the olog, or ontology log, a category-theoretic model for knowledge representation (KR). Grounded in formal mathematics, ologs can be rigorously formulated and cross-compared in ways that other KR models (such as semantic networks) cannot. An olog is similar to a relational database schema; i... | [
"cs.LO",
"cs.AI",
"math.CT"
] | null | [
"target.key_reference"
] | null | null | null |
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