title string | abstract string | url string | arxiv_id string | date string | category string |
|---|---|---|---|---|---|
27-day variation of the GCR intensity based on corrected and uncorrected for geomagnetic disturbances data of neutron monitors | We study 27-day variations of the galactic cosmic ray (GCR) intensity for
2005- 2008 period of the solar cycle #23. We use neutron monitors (NMs) data
corrected and uncorrected for geomagnetic disturbances. Besides the limited
time intervals when the 27-day variations are clearly established, always exist
some feeble 2... | http://arxiv.org/abs/1509.05738v1 | 1509.05738 | 2015-09-18 | cybersecurity |
27-day Variation of the Three Dimensional Solar Anisotropy of Galactic Cosmic Ray: 1965-2014 | The temporal evaluation of the 27-day variation of the three dimensional (3D)
galactic cosmic ray (GCR) anisotropy has been studied for 1965-2014. 3D
anisotropy vector was obtained based on the neutron monitors and Nagoya muon
telescopes data. We analyze the 27-day variation of the (1) two dimensional
(2D) GCR anisotro... | http://arxiv.org/abs/1509.05770v1 | 1509.05770 | 2015-09-18 | cybersecurity |
2.7-octave supercontinuum generation spanning from ultraviolet to near-infrared in thin-film lithium niobate waveguides | Supercontinuum generation (SCG) with spectral coverage across the full visible and ultraviolet (UV) ranges is crucial for optical clocks, quantum computing and sensing. However, achieving such SCG in nanophotonic platforms is challenging due to the difficulties in spectrum broadening. Here, Such ultrabroad-bandwidth SC... | https://arxiv.org/abs/2505.12438v1 | 2505.12438 | 2025-05-18 | cybersecurity |
27 Open Problems in Kolmogorov Complexity | The paper proposes open problems in classical Kolmogorov complexity. Each problem is presented with background information and thus the article also surveys some recent studies in the area. | https://arxiv.org/abs/2203.15109v1 | 2203.15109 | 2022-03-28 | cybersecurity |
$27 \otimes 27$ | We study the decomposition into $SU(N)$ irreducible representations (irreps) of the tensor product $27 \otimes 27$, where $27$ is the highest-dimensional $SU(N)$ irrep present in a two-gluon system, and explicitly construct all Hermitian projectors on these irreps, as well as transition operators between them. This yie... | https://arxiv.org/abs/2504.11362v1 | 2504.11362 | 2025-04-15 | cybersecurity |
$^{27}\text{Al }$ NMR chemical shift of $\text{Al}(\text{OH})_{4}^{-}$ from first principles. Assessment of error cancellation in NMR chemical shift computations in chemically distinct reference and targeted systems | Predicting accurate NMR chemical shieldings relies upon cancellation of
different types of error in the ab initio methodology used to calculate the
shielding tensor of the analyte of interest and the reference. Often the
intrinsic error in computed shieldings due to basis sets, approximations in the
Hamiltonian, descri... | http://arxiv.org/abs/2001.00107v1 | 2001.00107 | 2019-12-31 | cybersecurity |
280 Birds with One Stone: Inducing Multilingual Taxonomies from Wikipedia using Character-level Classification | We propose a simple, yet effective, approach towards inducing multilingual
taxonomies from Wikipedia. Given an English taxonomy, our approach leverages
the interlanguage links of Wikipedia followed by character-level classifiers to
induce high-precision, high-coverage taxonomies in other languages. Through
experiments,... | http://arxiv.org/abs/1704.07624v2 | 1704.07624 | 2017-04-25 | cybersecurity |
280 GHz Focal Plane Unit Design and Characterization for the SPIDER-2 Suborbital Polarimeter | We describe the construction and characterization of the 280 GHz bolometric
focal plane units (FPUs) to be deployed on the second flight of the
balloon-borne SPIDER instrument. These FPUs are vital to SPIDER's primary
science goal of detecting or placing an upper limit on the amplitude of the
primordial gravitational w... | http://arxiv.org/abs/1711.04169v2 | 1711.04169 | 2017-11-22 | cybersecurity |
2, 84, 30, 993, 560, 15456, 11962, 261485, ...: Higher dimension operators in the SM EFT | In a companion paper, we show that operator bases for general effective field
theories are controlled by the conformal algebra. Equations of motion and
integration by parts identities can be systematically treated by organizing
operators into irreducible representations of the conformal group. In the
present work, we u... | http://arxiv.org/abs/1512.03433v2 | 1512.03433 | 2019-08-23 | cybersecurity |
$^{28}$Al Half-life Measurement and the negative mirror asymmetry between the $^{28}$Al($β^-$)$^{28m}$Si and $^{28}$P($β^+$)$^{28m}$Si decays | In the past, the mirror asymmetry parameter has been proposed as a probing mechanism for the presence of beyond the Standard Model second-class currents in nuclear beta decay transitions. However, this was hindered by large uncertainties in the required nuclear structure correction terms. Recently, a new calculation of... | https://arxiv.org/abs/2505.01722v1 | 2505.01722 | 2025-05-03 | cybersecurity |
28 GHz Indoor and Outdoor Propagation Analysis at a Regional Airport | In the upcoming 5G communication, the millimeter-wave (mmWave) technology will play an important role due to its large bandwidth and high data rate. However, mmWave frequencies have higher free-space path loss (FSPL) in line-of-sight (LOS) propagation compared to the currently used sub-6 GHz frequencies. What is more, ... | https://arxiv.org/abs/2101.02599v1 | 2101.02599 | 2021-01-07 | cybersecurity |
28 GHz Millimeter-Wave Ultrawideband Small-Scale Fading Models in Wireless Channels | This paper presents small-scale fading measurements for 28 GHz outdoor
millimeter-wave ultrawideband channels using directional horn antennas at the
transmitter and receiver. Power delay profiles were measured at half-wavelength
spatial increments over a local area (33 wavelengths) on a linear track in two
orthogonal r... | http://arxiv.org/abs/1511.06938v2 | 1511.06938 | 2016-02-22 | cybersecurity |
28 GHz mmWave Channel Measurements and Modeling in a Library Environment | To fully exploit the millimeter-wave bands for the fifth generation cellular
systems, an accurate understanding of the channel propagation characteristics
is required, and hence extensive measurement campaigns in different
environments are needed. In this paper, we use a rotated directional
antenna-based channel sounde... | http://arxiv.org/abs/1910.08632v1 | 1910.08632 | 2019-10-18 | cybersecurity |
28 GHz NLOS Channel Measurements Revealing Low Path Loss and High Angular Spread in Container Ports | This paper presents results from a comprehensive measurement campaign conducted at 28 GHz inside a container canyon within a commercial port environment. The measurements are performed at various points inside the container canyon, considering two types of container stacking and two different Transmitter (TX) locations... | https://arxiv.org/abs/2309.02810v1 | 2309.02810 | 2023-09-06 | cybersecurity |
28 GHz Phased Array-Based Self-Interference Measurements for Millimeter Wave Full-Duplex | We present measurements of the 28 GHz self-interference channel for full-duplex sectorized multi-panel millimeter wave (mmWave) systems, such as integrated access and backhaul. We measure the isolation between the input of a transmitting phased array panel and the output of a co-located receiving phased array panel, ea... | https://arxiv.org/abs/2203.02809v1 | 2203.02809 | 2022-03-05 | cybersecurity |
28nm Fully-Depleted SOI Technology: Cryogenic Control Electronics for Quantum Computing | This paper reports the first cryogenic characterization of 28nm
Fully-Depleted-SOI CMOS technology. A comprehensive study of digital/analog
performances and body-biasing from room to the liquid helium temperature is
presented. Despite a cryogenic operation, effectiveness of body-biasing remains
unchanged and provides a... | http://arxiv.org/abs/2002.07070v1 | 2002.07070 | 2019-12-20 | cybersecurity |
28 THz soliton frequency comb in a continuous-wave pumped fiber Fabry-Perot resonator | We report the generation of an optical frequency comb featuring 28 THz bandwidth, sustained by a single 80 fs cavity soliton recirculating in a fiber Fabry-Perot resonator. This large spectrum is comparable to frequency combs obtained with microresonators operating in the anomalous dispersion regime. Thanks to the comp... | https://arxiv.org/abs/2401.12858v1 | 2401.12858 | 2024-01-23 | cybersecurity |
2900 square degree search for the optical counterpart of short gamma-ray burst GRB 180523B with the Zwicky Transient Facility | There is significant interest in the models for production of short gamma-ray
bursts. Until now, the number of known short gamma-ray bursts with
multi-wavelength afterglows has been small. While the {\it Fermi} Gamma-Ray
Burst Monitor detects many gamma-ray bursts relative to the Neil Gehrels {\it
Swift} Observatory, t... | http://arxiv.org/abs/1901.11385v1 | 1901.11385 | 2019-01-31 | cybersecurity |
29P/Schwassmann-Wachmann 1, A Centaur in the Gateway to the Jupiter-Family Comets | Jupiter-family comets (JFCs) are the evolutionary products of trans-Neptunian
objects (TNOs) that evolve through the giant planet region as Centaurs and into
the inner solar system. Through numerical orbital evolution calculations
following a large number of TNO test particles that enter the Centaur
population, we have... | http://arxiv.org/abs/1908.04185v2 | 1908.04185 | 2019-09-12 | cybersecurity |
29P/Schwassmann-Wachmann: A Rosetta Stone for Amorphous Water Ice and CO <-> CO2 Conversion in Centaurs and Comets? | Centaur 29P/Schwassmann-Wachmann 1 (SW1) is a highly active object orbiting in the transitional Gateway region (Sarid et al. 2019) between the Centaur and Jupiter Family Comet regions. SW1 is unique among the Centaurs in that it experiences quasi-regular major outbursts and produces CO emission continuously; however, t... | https://arxiv.org/abs/2209.09136v2 | 2209.09136 | 2022-09-19 | cybersecurity |
2ACT: AI-Accentuated Career Transitions via Skill Bridges | This study introduces the AI-Accentuated Career Transitions framework, advancing beyond binary automation narratives to examine how distinct AI usage patterns reshape occupational mobility. Analyzing 545 occupations through multivariate modeling, we identify six qualitatively distinct human-AI usage patterns that diffe... | https://arxiv.org/abs/2505.07914v1 | 2505.07914 | 2025-05-12 | cybersecurity |
2-adic Galois images of non-CM isogeny-torsion graphs | Let $\mathcal{E}$ be a $\mathbb{Q}$-isogeny class of elliptic curves defined over $\mathbb{Q}$ without CM. The isogeny graph associated to $\mathcal{E}$ is a graph which has a vertex for each elliptic curve in $\mathcal{E}$ and an edge for each $\mathbb{Q}$-isogeny of prime degree that maps one elliptic curve in $\math... | https://arxiv.org/abs/2302.06094v2 | 2302.06094 | 2023-02-13 | cybersecurity |
2-adic images of CM isogeny-torsion graphs | Let $\mathcal{E}$ be a $\mathbb{Q}$-isogeny class of elliptic curves defined over $\mathbb{Q}$. The isogeny graph associated to $\mathcal{E}$ is a graph which has a vertex for each element of $\mathcal{E}$ and an edge for each $\mathbb{Q}$-isogeny of prime degree that maps one elliptic curve in $\mathcal{E}$ to another... | https://arxiv.org/abs/2208.11649v2 | 2208.11649 | 2022-08-24 | cybersecurity |
$2$-adic integral models of some Shimura varieties with parahoric level structure | We construct integral models over $p=2$ for some Shimura varieties of abelian type with parahoric level structure, extending the previous work of Kim-Madapusi, Kisin, Pappas, and Zhou. For Shimura varieties of Hodge type, we show that our integral models are canonical in the sense of Pappas-Rapoport. | https://arxiv.org/abs/2301.12981v2 | 2301.12981 | 2023-01-25 | cybersecurity |
2-adic point counting on $K3$ surfaces | This article reports on an approach to point counting on algebraic varieties over finite fields that is based on a detailed investigation of the $2$-adic orthogonal group. Combining the new approach with a $p$-adic method, we count the number of points on some $K3$ surfaces over the field $\bbF_{\!p}$, for all primes $... | https://arxiv.org/abs/2202.10853v2 | 2202.10853 | 2022-02-22 | cybersecurity |
2-Adic quantum mechanics, continuous-time quantum walks, and the space discreteness | Using techniques of p-adic analysis, it is possible to formulate a rigorous version of the quantum mechanics (QM), in the sense of Dirac-von Neumann, consistent with the existence of the Planck length. Such a model cannot be formulated if we use R^{3} as a model for physical space. The experimental testability of physi... | https://arxiv.org/abs/2502.16416v1 | 2502.16416 | 2025-02-23 | cybersecurity |
$2$-adic slopes of Hilbert modular forms over $\mathbb{Q}(\sqrt{5})$ | We show that for arithmetic weights with a fixed finite order character, the
slopes of $U_p$ (for $p=2$) acting on overconvergent Hilbert modular forms of
level $U_0(4)$ are independent of the (algebraic part of the) weight and can be
obtained by a simple recipe from the classical slopes in parallel weight $3$. | http://arxiv.org/abs/1811.04799v3 | 1811.04799 | 2020-05-10 | cybersecurity |
2-Adic Stratification of Totients | In this paper we study the multiplicities and the asymptotic behaviour of the
numbers of totients in the strata given by 2-adic valuation. | http://arxiv.org/abs/2005.05475v1 | 2005.05475 | 2020-05-11 | cybersecurity |
2-adic Valuations of Quadratic Sequences | Properties of 2-adic valuation sequences for general quadratic polynomials with integer coefficients are determined directly from the coefficients. These properties include boundedness or unboundedness, periodicity, and valuations at terminating nodes. We completely describe the periodic sequences in the bounded case. ... | https://arxiv.org/abs/2012.10332v4 | 2012.10332 | 2020-12-18 | cybersecurity |
2-adjoint equivalences in homotopy type theory | We introduce the notion of (half) 2-adjoint equivalences in Homotopy Type Theory and prove their expected properties. We formalized these results in the Lean Theorem Prover. | https://arxiv.org/abs/2008.12433v4 | 2008.12433 | 2020-08-28 | cybersecurity |
2AFC Prompting of Large Multimodal Models for Image Quality Assessment | While abundant research has been conducted on improving high-level visual understanding and reasoning capabilities of large multimodal models~(LMMs), their visual quality assessment~(IQA) ability has been relatively under-explored. Here we take initial steps towards this goal by employing the two-alternative forced cho... | https://arxiv.org/abs/2402.01162v1 | 2402.01162 | 2024-02-02 | cybersecurity |
$2^{\aleph_0}$ pairwise non-isomorphic maximal-closed subgroups of Sym$(\mathbb{N})$ via the classification of the reducts of the Henson digraphs | Given two structures $\mathcal{M}$ and $\mathcal{N}$ on the same domain, we
say that $\mathcal{N}$ is a reduct of $\mathcal{M}$ if all
$\emptyset$-definable relations of $\mathcal{N}$ are $\emptyset$-definable in
$\mathcal{M}$. In this article the reducts of the Henson digraphs are
classified. Henson digraphs are homog... | http://arxiv.org/abs/1509.07674v1 | 1509.07674 | 2015-09-25 | cybersecurity |
2$\alpha$+$t$ cluster structure in $^{11}$B | The 2$\alpha+t$ cluster structure in $^{11}$B is investigated by the
microscopic generator coordinate method (GCM) with the Brink cluster wave
functions. With a proper choice of the parameters of the effective interaction,
the calculated energy spectrum shows reasonable agreement with the observed
low-lying spectra of ... | http://arxiv.org/abs/1711.04439v1 | 1711.04439 | 2017-11-13 | cybersecurity |
2- and 3-Covariant Equiangular Tight Frames | Equiangular tight frames (ETFs) are configurations of vectors which are
optimally geometrically spread apart and provide resolutions of the identity.
Many known constructions of ETFs are group covariant, meaning they result from
the action of a group on a vector, like all known constructions of symmetric,
informational... | http://arxiv.org/abs/1901.10612v2 | 1901.10612 | 2019-05-21 | cybersecurity |
2 and 9 are the only biunitary superperfect numbers | We shall show that 2 and 9 are the only biunitary superperfect numbers. | http://arxiv.org/abs/1705.00189v1 | 1705.00189 | 2017-04-29 | cybersecurity |
2-Approximation for Prize-Collecting Steiner Forest | Approximation algorithms for the prize-collecting Steiner forest problem (PCSF) have been a subject of research for over three decades, starting with the seminal works of Agrawal, Klein, and Ravi and Goemans and Williamson on Steiner forest and prize-collecting problems. In this paper, we propose and analyze a natural ... | https://arxiv.org/abs/2309.05172v2 | 2309.05172 | 2023-09-11 | cybersecurity |
2-Arc-transitive Cayley graphs on alternating groups | An interesting fact is that most of the known connected $2$-arc-transitive nonnormal Cayley graphs of small valency on finite simple groups are $(\mathrm{A}_{n+1},2)$-arc-transitive Cayley graphs on $\mathrm{A}_n$. This motivates the study of $2$-arc-transitive Cayley graphs on $\mathrm{A}_n$ for arbitrary valency. In ... | https://arxiv.org/abs/2103.14784v1 | 2103.14784 | 2021-03-27 | cybersecurity |
2-associahedra | For any $r\geq 1$ and $\mathbf{n} \in \mathbb{Z}_{\geq0}^r \setminus
\{\mathbf0\}$ we construct a poset $W_{\mathbf{n}}$ called a 2-associahedron.
The 2-associahedra arose in symplectic geometry, where they are expected to
control maps between Fukaya categories of different symplectic manifolds. We
prove that the compl... | http://arxiv.org/abs/1709.00119v2 | 1709.00119 | 2018-08-22 | cybersecurity |
$(2B, 3A, 5A)$-subalgebras of the Griess algebra with alternating Miyamoto group | We use Majorana representations to study the subalgebras of the Griess algebra that have shape $(2B,3A,5A)$ and whose associated Miyamoto groups are isomorphic to $A_n$. We prove that these subalgebras exist only if $n\in \{5,6,8\}$. The case $n=5$ was already treated by Ivanov, Seress, McInroy, and Shpectorov. In case... | https://arxiv.org/abs/2504.17446v1 | 2504.17446 | 2025-04-24 | cybersecurity |
2^B3^C: 2 Box 3 Crop of Facial Image for Gender Classification with Convolutional Networks | In this paper, we tackle the classification of gender in facial images with
deep learning. Our convolutional neural networks (CNN) use the VGG-16
architecture [1] and are pretrained on ImageNet for image classification. Our
proposed method (2^B3^C) first detects the face in the facial image, increases
the margin of a d... | http://arxiv.org/abs/1803.02181v1 | 1803.02181 | 2018-03-05 | cybersecurity |
2-balanced sequences coding rectangle exchange transformation | We define a new class of ternary sequences that are 2-balanced. These sequences are obtained by colouring of Sturmian sequences. We show that the class contains sequences of any given letter frequencies. We provide an upper bound on factor and abelian complexity of these sequences. Using the interpretation by rectangle... | https://arxiv.org/abs/2403.12791v1 | 2403.12791 | 2024-03-19 | cybersecurity |
2-bit Conformer quantization for automatic speech recognition | Large speech models are rapidly gaining traction in research community. As a result, model compression has become an important topic, so that these models can fit in memory and be served with reduced cost. Practical approaches for compressing automatic speech recognition (ASR) model use int8 or int4 weight quantization... | https://arxiv.org/abs/2305.16619v1 | 2305.16619 | 2023-05-26 | cybersecurity |
2-bit Model Compression of Deep Convolutional Neural Network on ASIC Engine for Image Retrieval | Image retrieval utilizes image descriptors to retrieve the most similar images to a given query image. Convolutional neural network (CNN) is becoming the dominant approach to extract image descriptors for image retrieval. For low-power hardware implementation of image retrieval, the drawback of CNN-based feature descri... | https://arxiv.org/abs/1905.03362v1 | 1905.03362 | 2019-05-08 | cybersecurity |
2-Bit Random Projections, NonLinear Estimators, and Approximate Near Neighbor Search | The method of random projections has become a standard tool for machine
learning, data mining, and search with massive data at Web scale. The effective
use of random projections requires efficient coding schemes for quantizing
(real-valued) projected data into integers. In this paper, we focus on a simple
2-bit coding ... | http://arxiv.org/abs/1602.06577v1 | 1602.06577 | 2016-02-21 | cybersecurity |
2-bit topological-encoded acoustic multifunctional device | Valley degree of freedom, an excellent information carrier in valleytronics, has been further introduced into advanced microstructure systems for achieving the acoustic valley-Hall topological insulators (VHTIs), which host valley-projected edge states suppressing the undesired sound backscattering under certain pertur... | https://arxiv.org/abs/2104.10607v3 | 2104.10607 | 2021-04-21 | cybersecurity |
2BiVQA: Double Bi-LSTM based Video Quality Assessment of UGC Videos | Recently, with the growing popularity of mobile devices as well as video sharing platforms (e.g., YouTube, Facebook, TikTok, and Twitch), User-Generated Content (UGC) videos have become increasingly common and now account for a large portion of multimedia traffic on the internet. Unlike professionally generated videos ... | https://arxiv.org/abs/2208.14774v3 | 2208.14774 | 2022-08-31 | cybersecurity |
$2$-blocks in strongly biconnected directed graphs | A directed graph $G=(V,E)$ is called strongly biconnected if $G$ is strongly
connected and the underlying graph of $G$ is biconnected. A strongly
biconnected component of a strongly connected graph $G=(V,E)$ is a maximal
vertex subset $L\subseteq V$ such that the induced subgraph on $L$ is strongly
biconnected. Let $G=... | http://arxiv.org/abs/2007.09793v1 | 2007.09793 | 2020-07-19 | cybersecurity |
2-blocks with an abelian defect group and a freely acting cyclic inertial quotient | We study blocks with an abelian defect group and a cyclic inertial quotient
acting freely but not transitively. We prove that when p=2, such blocks are
inertial, i.e. basic Morita equivalent to their Brauer correspondent. Together
with a result of the second author on Singer cycle actions on homocyclic defect
groups, t... | http://arxiv.org/abs/2010.08329v2 | 2010.08329 | 2020-10-19 | cybersecurity |
2B or not 2B, a study of bottom-quark-philic semi-visible jets | Semi-visible jets arise in strongly interacting dark sector, resulting in jets overlapping with the missing transverse momentum direction. The implementation of semi-visible jets is done using the Pythia Hidden Valley module to mimic the QCD sector showering in so-called dark shower. In this work, only heavy flavour St... | https://arxiv.org/abs/2207.01885v4 | 2207.01885 | 2022-07-05 | cybersecurity |
2$b$ or not 2$b$: on the rejection of $g\to b\bar b$ jets | Motivated by new physics models which lead to final states containing a high multiplicity of bottom and top quarks, we develop a tagging strategy to suppress reducible and non-reducible multi-jet backgrounds. The idea takes advantage of the properties of light parton showers and of the gluon fragmentation into heavy qu... | https://arxiv.org/abs/2310.04380v2 | 2310.04380 | 2023-10-06 | cybersecurity |
2BP: 2-Stage Backpropagation | As Deep Neural Networks (DNNs) grow in size and complexity, they often exceed the memory capacity of a single accelerator, necessitating the sharding of model parameters across multiple accelerators. Pipeline parallelism is a commonly used sharding strategy for training large DNNs. However, current implementations of p... | https://arxiv.org/abs/2405.18047v1 | 2405.18047 | 2024-05-28 | cybersecurity |
2-branes with Arnold-Beltrami Fluxes from Minimal D=7 Supergravity | We describe this paper as a Sentimental Journey from Hydrodynamics to
Supergravity. Beltrami equation in three dimensions that plays a key role in
the hydrodynamics of incompressible fluids has an unsuspected relation with
minimal supergravity in seven dimensions. We show that just D=7 supergravity
and no other theory ... | http://arxiv.org/abs/1504.06802v1 | 1504.06802 | 2015-04-26 | cybersecurity |
2by2: Weakly-Supervised Learning for Global Action Segmentation | This paper presents a simple yet effective approach for the poorly investigated task of global action segmentation, aiming at grouping frames capturing the same action across videos of different activities. Unlike the case of videos depicting all the same activity, the temporal order of actions is not roughly shared am... | https://arxiv.org/abs/2412.12829v1 | 2412.12829 | 2024-12-17 | cybersecurity |
2-Calabi-Yau categories with a directed cluster-tilting subcategory | As a generalization of acyclic 2-Calabi-Yau categories, we consider
2-Calabi-Yau categories with a directed cluster-tilting subcategory; we study
their cluster-tilting subcategories and the cluster combinatorics that they
encode. We show that such categories have a cluster structure.
Triangulated 2-Calabi-Yau categor... | http://arxiv.org/abs/1611.03836v1 | 1611.03836 | 2016-11-11 | cybersecurity |
2-Cartesian fibrations I: A model for $\infty$-bicategories fibred in $\infty$-bicategories | In this paper, we provide a notion of $\infty$-bicategories fibred in $\infty$-bicategories which we call 2-Cartesian fibrations. Our definition is formulated using the language of marked biscaled simplicial sets: Those are scaled simplicial sets equipped with an additional collection of triangles containing the scaled... | https://arxiv.org/abs/2106.03606v1 | 2106.03606 | 2021-06-07 | cybersecurity |
2-Cartesian fibrations II: A Grothendieck construction for $\infty$-bicategories | In this work, we conclude our study of fibred $\infty$-bicategories by providing a Grothendieck construction in this setting. Given a scaled simplicial set $S$ (which need not be fibrant) we construct a 2-categorical version of Lurie's straightening-unstraightening adjunction, thereby furnishing an equivalence between ... | https://arxiv.org/abs/2201.09589v3 | 2201.09589 | 2022-01-24 | cybersecurity |
2-categorical affine symmetries of quantum enveloping algebras | We produce 2-representations of the positive part of affine quantum enveloping algebras on their finite-dimensional counterparts in type $A_n$. These 2-representations naturally extend the right-multiplication 2-representation of $U_q^+(\mathfrak{sl}_{n+1})$ on itself and are closely related to evaluation morphisms of ... | https://arxiv.org/abs/2502.08039v2 | 2502.08039 | 2025-02-12 | cybersecurity |
2-categorical approach to unifying constructions of precoverings and its applications | Throughout this paper $G$ is a fixed group, and $k$ is a fixed field. All categories are assumed to be $k$-linear. First we give a systematic way to induce $G$-precoverings by adjoint functors using a 2-categorical machinery, which unifies many similar constructions of $G$-precoverings. Now let $\mathcal{C}$ be a skele... | https://arxiv.org/abs/2402.04680v1 | 2402.04680 | 2024-02-07 | cybersecurity |
2-categorical opfibrations, Quillen's Theorem B, and $S^{-1}S$ | In this paper we show that the strict and lax pullbacks of a 2-categorical opfibration along an arbitrary 2-functor are homotopy equivalent. We give two applications. First, we show that the strict fibers of an opfibration model the homotopy fibers. This is a version of Quillen's Theorem B amenable to applications. Sec... | https://arxiv.org/abs/2010.11173v2 | 2010.11173 | 2020-10-21 | cybersecurity |
2-categories and cyclic homology | The topic of this thesis is the application of distributive laws between
comonads to the theory of cyclic homology. Explicitly, our main aims are: 1) To
study how the cyclic homology of associative algebras and of Hopf algebras in
the original sense of Connes and Moscovici arises from a distributive law, and
to clarify... | http://arxiv.org/abs/1605.08992v1 | 1605.08992 | 2016-05-29 | cybersecurity |
$2$-Categories from a Gray Perspective | In this paper we present $2$-category theory from the perspective of Gray-categories using the graphical calculus of separated surface diagrams. As an extended example we consider cones and limits of $2$-functors. Then we use the canonical adjunction between $2$-computads and $2$-categories to interpret the comparison ... | https://arxiv.org/abs/2203.08783v1 | 2203.08783 | 2022-03-16 | cybersecurity |
2-categories of symmetric bimodules and their 2-representations | In this article we analyze the structure of $2$-categories of symmetric
projective bimodules over a finite dimensional algebra with respect to the
action of a finite abelian group. We determine under which condition the
resulting $2$-category is fiat (in the sense of \cite{MM1}) and classify simple
transitive $2$-repre... | http://arxiv.org/abs/1904.05798v1 | 1904.05798 | 2019-04-11 | cybersecurity |
2 Category of FRBSU Monoidal Categories and Crossed Modules | In that paper, we prove that the collection of all FRBSU monoidal categories
and the collection of all crossed modules form a 2 category. | http://arxiv.org/abs/1512.06981v1 | 1512.06981 | 2015-12-22 | cybersecurity |
2-Category of Topological Quantum Computation | Unitary Ribbon Fusion Categories (URFC) formalize anyonic theories. It has been widely assumed that the same category formalizes a topological quantum computing model. However, in previous work, we addressed and resolved this confusion and demonstrated while the former could be any fusion category, the latter is always... | https://arxiv.org/abs/2505.22171v1 | 2505.22171 | 2025-05-28 | cybersecurity |
2-Cats: 2D Copula Approximating Transforms | Copulas are powerful statistical tools for capturing dependencies across data dimensions. Applying Copulas involves estimating independent marginals, a straightforward task, followed by the much more challenging task of determining a single copulating function, $C$, that links these marginals. For bivariate data, a cop... | https://arxiv.org/abs/2309.16391v5 | 2309.16391 | 2023-09-28 | cybersecurity |
$2\cdot 10^{-13}$ fractional laser frequency stability with a 7-cm unequal-arm Mach-Zehnder interferometer | To achieve sub-picometer sensitivities in the millihertz band, laser interferometric inertial sensors rely on some form of reduction of the laser frequency noise, typically by locking the laser to a stable frequency reference, such as the narrow-linewidth resonance of an ultra-stable optical cavity or an atomic or mole... | https://arxiv.org/abs/2308.11325v2 | 2308.11325 | 2023-08-22 | cybersecurity |
2CET-GAN: Pixel-Level GAN Model for Human Facial Expression Transfer | Recent studies have used GAN to transfer expressions between human faces. However, existing models have many flaws: relying on emotion labels, lacking continuous expressions, and failing to capture the expression details. To address these limitations, we propose a novel CycleGAN- and InfoGAN-based network called 2 Cycl... | https://arxiv.org/abs/2211.11570v1 | 2211.11570 | 2022-11-18 | cybersecurity |
2-chains: an interesting family of posets | We introduce a new family of finite posets which we call 2-chains. These
first arose in the study of 0-Hecke algebras, but they admit a variety of
different characterisations. We give these characterisations, prove that they
are equivalent and derive some numerical results concerning 2-chains. | http://arxiv.org/abs/1809.07574v2 | 1809.07574 | 2020-01-29 | cybersecurity |
2-charge circular fuzz-balls and their perturbations | We perform a detailed study of perturbations around 2-charge circular fuzz-balls and compare the results with the ones obtained in the case of 'small' BHs. In addition to the photon-sphere modes that govern the prompt ring-down, we find a new branch of long-lived QNMs localised inside the photon-sphere at the (meta)sta... | https://arxiv.org/abs/2212.07504v1 | 2212.07504 | 2022-12-14 | cybersecurity |
$2$-class groups of cyclotomic towers of imaginary biquadratic fields and applications | Let $d$ be a positive square-free integer. In this paper we shall investigate
the structure of the $2$-class group of the cyclotomic $\mathbb{Z}_2$-extension
of the imaginary biquadratic number field $\mathbb{Q}(\sqrt{d},\sqrt{-1})$.
Furthermore, we deduce the structure of the $2$-class group of cyclotomic
$\mathbb{Z}_... | http://arxiv.org/abs/2002.03602v3 | 2002.03602 | 2020-06-15 | cybersecurity |
2-classifiers via dense generators and Hofmann-Streicher universe in stacks | We expand the theory of 2-classifiers, that are a 2-categorical generalization of subobject classifiers introduced by Weber. The idea is to upgrade monomorphisms to discrete opfibrations. We prove that the conditions of 2-classifier can be checked just on a dense generator. The study of what is classified by a 2-classi... | https://arxiv.org/abs/2401.16900v3 | 2401.16900 | 2024-01-30 | cybersecurity |
2-CLUB is NP-hard for distance to 2-club cluster graphs | We show that 2-CLUB is NP-hard for distance to 2-club cluster graphs. | http://arxiv.org/abs/1903.05425v1 | 1903.05425 | 2019-03-13 | cybersecurity |
2-Cluster Fixed-Point Analysis of Mean-Coupled Stuart-Landau Oscillators in the Center Manifold | We reduce the dynamics of an ensemble of mean-coupled Stuart-Landau oscillators close to the synchronized solution. In particular, we map the system onto the center manifold of the Benjamin-Feir instability, the bifurcation destabilizing the synchronized oscillation. Using symmetry arguments, we describe the structure ... | https://arxiv.org/abs/2010.06221v2 | 2010.06221 | 2020-10-13 | cybersecurity |
2CoBel : An Efficient Belief Function Extension for Two-dimensional Continuous Spaces | This paper introduces an innovative approach for handling 2D compound
hypotheses within the Belief Function Theory framework. We propose a
polygon-based generic rep- resentation which relies on polygon clipping
operators. This approach allows us to account in the computational cost for the
precision of the representati... | http://arxiv.org/abs/1803.08857v1 | 1803.08857 | 2018-03-23 | cybersecurity |
2-coherent and 2-convex Conditional Lower Previsions | In this paper we explore relaxations of (Williams) coherent and convex
conditional previsions that form the families of $n$-coherent and $n$-convex
conditional previsions, at the varying of $n$. We investigate which such
previsions are the most general one may reasonably consider, suggesting
(centered) $2$-convex or, i... | http://arxiv.org/abs/1606.06043v1 | 1606.06043 | 2016-06-20 | cybersecurity |
2-Coherent Internal Models of Homotopical Type Theory | The program of internal type theory seeks to develop the categorical model theory of dependent type theory using the language of dependent type theory itself. In the present work we study internal homotopical type theory by relaxing the notion of a category with families (cwf) to that of a wild, or precoherent higher c... | https://arxiv.org/abs/2503.05790v1 | 2503.05790 | 2025-02-28 | cybersecurity |
2-Co-lacunary sequences in noncommutative symmetric Banach spaces | We characterize noncommutative symmetric Banach spaces for which every
bounded sequence admits either a convergent subsequence, or a $2$-co-lacunary
subsequence. This extends the classical characterization, due to R\"abiger. | http://arxiv.org/abs/1909.04258v1 | 1909.04258 | 2019-09-10 | cybersecurity |
2-Colorable Perfect Matching is NP-complete in 2-Connected 3-Regular Planar Graphs | The 2-colorable perfect matching problem asks whether a graph can be colored with two colors so that each node has exactly one neighbor with the same color as itself. We prove that this problem is NP-complete, even when restricted to 2-connected 3-regular planar graphs. In 1978, Schaefer proved that this problem is NP-... | https://arxiv.org/abs/2309.09786v1 | 2309.09786 | 2023-09-18 | cybersecurity |
2-colored Rogers-Ramanujan partition identities | In this paper, we combined two types of partitions and introduced 2-colored Rogers-Ramanujan partitions. By finding some functional equations and using a constructive method, some identities have been found. Some Overpartition identities coincide with our findings. A correspondence between colored partitions and overpa... | https://arxiv.org/abs/2203.15378v1 | 2203.15378 | 2022-03-29 | cybersecurity |
2-complexes with large 2-girth | The 2-girth of a 2-dimensional simplicial complex $X$ is the minimum size of
a non-zero 2-cycle in $H_2(X, \mathbb{Z}/2)$. We consider the maximum possible
girth of a complex with $n$ vertices and $m$ 2-faces. If $m = n^{2 + \alpha}$
for $\alpha < 1/2$, then we show that the 2-girth is at most $4 n^{2 - 2
\alpha}$ and ... | http://arxiv.org/abs/1509.03871v2 | 1509.03871 | 2017-07-10 | cybersecurity |
$2$-complexes with unique embeddings in 3-space | A well-known theorem of Whitney states that a 3-connected planar graph admits an essentially unique embedding into the 2-sphere. We prove a 3-dimensional analogue: a simply-connected $2$-complex every link graph of which is 3-connected admits an essentially unique locally flat embedding into the 3-sphere, if it admits ... | https://arxiv.org/abs/2109.04085v1 | 2109.04085 | 2021-09-09 | cybersecurity |
2-complex symmetric composition operators on $H^2$ | In this paper, we study 2-complex symmetric composition operators with the conjugation $J$ on the Hardy space $H^2$. More precisely, we obtain the necessary and sufficient condition for the composition operator $C_\phi$ to be 2-complex symmetric when the symbols $\phi$ is an automorphism of $\mathbb D$. We also charact... | https://arxiv.org/abs/2110.11184v1 | 2110.11184 | 2021-10-21 | cybersecurity |
2-connected claw-free chordal graphs are cycle extendable | A cycle $C$ of length $k$ in graph $G$ is extendable if there is another
cycle $C'$ in $G$ with $V(C) \subset V(C')$ and length $k+1$. A graph is cycle
extendable if every non-Hamiltonian cycle is extendable. In 1990 Hendry
conjectured that any Hamiltonian chordal graph (a Hamiltonian graph with no
induced cycle of len... | http://arxiv.org/abs/1310.2901v4 | 1310.2901 | 2016-02-28 | cybersecurity |
2-Coupon Coloring of Cubic Graphs Containing 3-Cycle or 4-Cycle | Let $G$ be a graph. A total dominating set in a graph $G$ is a set $S$ of vertices of $G$ such that every vertex in $G$ is adjacent to a vertex in $S$. Recently, the following question was proposed: "Is it true that every connected cubic graph containing a $3$-cycle has two vertex disjoint total dominating sets?" In th... | https://arxiv.org/abs/2308.15114v1 | 2308.15114 | 2023-08-29 | cybersecurity |
2-covers of wide Young diagrams | A Young diagram $Y$ is called wide if every sub-diagram $Z$ formed by a subset of the rows of $Y$ dominates $Z'$, the conjugate of $Z$. A Young diagram $Y$ is called Latin if its squares can be assigned numbers so that for each $i$, the $i$th row is filled injectively with the numbers $1, \ldots ,a_i$, where $a_i$ is t... | https://arxiv.org/abs/2311.17670v2 | 2311.17670 | 2023-11-29 | cybersecurity |
2CP: Decentralized Protocols to Transparently Evaluate Contributivity in Blockchain Federated Learning Environments | Federated Learning harnesses data from multiple sources to build a single model. While the initial model might belong solely to the actor bringing it to the network for training, determining the ownership of the trained model resulting from Federated Learning remains an open question. In this paper we explore how Block... | https://arxiv.org/abs/2011.07516v1 | 2011.07516 | 2020-11-15 | cybersecurity |
2-Cycles on Higher Fano Hypersurfaces | Let F(X_d) be a smooth Fano variety of lines of a hypersurface X_d of degree
d. In this paper, we prove the Griffiths group Griff_1(F(X_d)) is trivial if
the hypersurface X_d is of 2-Fano type. As a result, we give a positive answer
to a question of Professor Voisin about the first Griffiths groups of Fano
varieties in... | http://arxiv.org/abs/1512.01721v3 | 1512.01721 | 2016-10-12 | cybersecurity |
2d (0,2) Gauge Theories from Branes: Recent Progress in Brane Brick Models | We discuss the realization of $2d$ $(0,2)$ gauge theories in terms of branes focusing on Brane Brick Models, which are T-dual to D1-branes probing toric Calabi-Yau 4-folds. These brane setups fully encode the infinite class of $2d$ $(0,2)$ quiver gauge theories on the worldvolume of the D1-branes and substantially stre... | https://arxiv.org/abs/2402.06993v1 | 2402.06993 | 2024-02-10 | cybersecurity |
2d (0,2) Quiver Gauge Theories and D-Branes | We initiate a systematic study of 2d (0,2) quiver gauge theories on the
worldvolume of D1-branes probing singular toric Calabi-Yau 4-folds. We present
an algorithm for efficiently calculating the classical mesonic moduli spaces of
these theories, which correspond to the probed geometries. We also introduce a
systematic... | http://arxiv.org/abs/1506.03818v2 | 1506.03818 | 2015-06-30 | cybersecurity |
2D, 2.5D, or 3D? An Exploratory Study on Multilayer Network Visualisations in Virtual Reality | Relational information between different types of entities is often modelled by a multilayer network (MLN) -- a network with subnetworks represented by layers. The layers of an MLN can be arranged in different ways in a visual representation, however, the impact of the arrangement on the readability of the network is a... | https://arxiv.org/abs/2307.10674v2 | 2307.10674 | 2023-07-20 | cybersecurity |
2D2C, 2D3C, 2C2Dcw1C3D, 3D3C, rotating turbulence, thin-layer flows, quasi-static magnetohydrodynamics (QSMHD), and beyond | More serious works on 2D2C, 2D3C, 2C2Dcw1C3D, 3D3C, rotating turbulence,
thin-layer flows, quasi-static magnetohydrodynamics (QSMHD), and all that are
wanted, but we report timely here some studies on locally and globally
2C2Dcw1C3D flows, with the hope to promote smarter and deeper works. | http://arxiv.org/abs/1408.1503v5 | 1408.1503 | 2018-03-30 | cybersecurity |
2D-2FA: A New Dimension in Two-Factor Authentication | We propose a two-factor authentication (2FA) mechanism called 2D-2FA to address security and usability issues in existing methods. 2D-2FA has three distinguishing features: First, after a user enters a username and password on a login terminal, a unique $\textit{identifier}$ is displayed to her. She $\textit{inputs}$ t... | https://arxiv.org/abs/2110.15872v1 | 2110.15872 | 2021-10-29 | cybersecurity |
2D-3D Attention and Entropy for Pose Robust 2D Facial Recognition | Despite recent advances in facial recognition, there remains a fundamental issue concerning degradations in performance due to substantial perspective (pose) differences between enrollment and query (probe) imagery. Therefore, we propose a novel domain adaptive framework to facilitate improved performances across large... | https://arxiv.org/abs/2505.09073v1 | 2505.09073 | 2025-05-14 | cybersecurity |
2D-3D crossover in a dense electron liquid in silicon | Doping of silicon via phosphene exposures alternating with molecular beam
epitaxy overgrowth is a path to Si:P substrates for conventional
microelectronics and quantum information technologies. The technique also
provides a new and well-controlled material for systematic studies of
two-dimensional lattices with a half-... | http://arxiv.org/abs/1802.05208v2 | 1802.05208 | 2018-02-15 | cybersecurity |
2D/3D Deep Image Registration by Learning 3D Displacement Fields for Abdominal Organs | Deformable registration of two-dimensional/three-dimensional (2D/3D) images of abdominal organs is a complicated task because the abdominal organs deform significantly and their contours are not detected in two-dimensional X-ray images. We propose a supervised deep learning framework that achieves 2D/3D deformable imag... | https://arxiv.org/abs/2212.05445v1 | 2212.05445 | 2022-12-11 | cybersecurity |
2D-3D Deformable Image Registration of Histology Slide and Micro-CT with ML-based Initialization | Recent developments in the registration of histology and micro-computed tomography ({\mu}CT) have broadened the perspective of pathological applications such as virtual histology based on {\mu}CT. This topic remains challenging because of the low image quality of soft tissue CT. Additionally, soft tissue samples usuall... | https://arxiv.org/abs/2410.14343v1 | 2410.14343 | 2024-10-18 | cybersecurity |
2D+3D Facial Expression Recognition via Discriminative Dynamic Range Enhancement and Multi-Scale Learning | In 2D+3D facial expression recognition (FER), existing methods generate multi-view geometry maps to enhance the depth feature representation. However, this may introduce false estimations due to local plane fitting from incomplete point clouds. In this paper, we propose a novel Map Generation technique from the viewpoi... | https://arxiv.org/abs/2011.08333v1 | 2011.08333 | 2020-11-16 | cybersecurity |
2D+3D facial expression recognition via embedded tensor manifold regularization | In this paper, a novel approach via embedded tensor manifold regularization for 2D+3D facial expression recognition (FERETMR) is proposed. Firstly, 3D tensors are constructed from 2D face images and 3D face shape models to keep the structural information and correlations. To maintain the local structure (geometric info... | https://arxiv.org/abs/2201.12506v1 | 2201.12506 | 2022-01-29 | cybersecurity |
2D-3D Fully Convolutional Neural Networks for Cardiac MR Segmentation | In this paper, we develop a 2D and 3D segmentation pipelines for fully
automated cardiac MR image segmentation using Deep Convolutional Neural
Networks (CNN). Our models are trained end-to-end from scratch using the ACD
Challenge 2017 dataset comprising of 100 studies, each containing Cardiac MR
images in End Diastole ... | http://arxiv.org/abs/1707.09813v1 | 1707.09813 | 2017-07-31 | cybersecurity |
2D-3D Geometric Fusion Network using Multi-Neighbourhood Graph Convolution for RGB-D Indoor Scene Classification | Multi-modal fusion has been proved to help enhance the performance of scene classification tasks. This paper presents a 2D-3D Fusion stage that combines 3D Geometric Features with 2D Texture Features obtained by 2D Convolutional Neural Networks. To get a robust 3D Geometric embedding, a network that uses two novel laye... | https://arxiv.org/abs/2009.11154v3 | 2009.11154 | 2020-09-23 | cybersecurity |
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