text stringlengths 100 957k | meta stringclasses 1
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This is straightforward to prove for any unitarily-invariant norm, and in particular is thus true for the Frobenius norm. I don't think there is a library which returns the matrix you want, but here is a "just for fun" coding of neareast positive semi-definite matrix algorithm from Higham (2000) import numpy as np , nu... | {} |
Lemma 10.119.17. Let $R$ be a ring. The following are equivalent
1. $R$ is a Dedekind domain,
2. $R$ is a Noetherian domain, and for every maximal ideal $\mathfrak m$ the local ring $R_{\mathfrak m}$ is a discrete valuation ring, and
3. $R$ is a Noetherian, normal domain, and $\dim (R) \leq 1$.
Proof. Assume (1). ... | {} |
# Are there tools to select the best material based on their functions?
I'm working on a small engineer project and I need to know which materials are candidate depending on their functions. For example, I needed a material for a part of the machine that need to be transparent but not easy-break as a crystal glass. I ... | {} |
# Imports and Setup¶
First, let's make the standard imports
In [1]:
from bokeh.io import output_notebook, show
from bokeh.plotting import figure
In [2]:
output_notebook()
In [3]:
import bokeh.sampledata
Using data directory: /Users/bryan/.bokeh/data
Skipping 'CGM.csv' (checksum match)
Skipping 'US_Counties.zip' (... | {} |
# Rotating 1/x to make a hyperbola?
Khan
Hey everyone, I was having trouble with this question.
The graph of 1/x is a hyperbola, but it's equation does not fit the form (x-h)/(a^2) - (y-k)/(b^2) = 1. Rotate 1/x using polar coordinates, change it back into cartesian coordinates, and write the equation in standard hybe... | {} |
## Section2.1Basic Notions
The set of complex numbers is obtained algebraically by adjoining the number $i$ to the set $\mathbb{R}$ of real numbers, where $i$ is defined by the property that $i^2 = -1$. We will take a geometric approach and define a complex number to be an ordered pair $(x,y)$ of real numbers. We let... | {} |
Labware - MA35 Multivariable Calculus - Two Variable Calculus
MA35 Labs 2 » Two Variable Calculus Contents2.4 Integration 2.4.1 Volume Under a Function Graph 2.4.2 Riemann Integral 2.4.6 Change of Variables 2.4.8 Center of Mass 2.4.9 Moment of Inertia Search
Volume Under a Function Graph (Page: 1 | 2 )
Text
For a f... | {} |
Next: Photon-Electron Scattering Up: QED Processes Previous: Electron Scattering from a
# Bremsstrahlung
When electrons scatter they can emit real photons. This process is called bremsstrahlung because it involves an acceleration or deceleration (in German bremson'') of the projectile. This bremsstrahlung or decelera... | {} |
Agohofidov6
2022-01-21
Particular solution to $y{}^{″}-3{y}^{\prime }+2y=2{e}^{x}$
limacarp4
Expert
$y{}^{″}-3{y}^{\prime }+2y=2{e}^{x}$.
Use operator D:
Let $D=\frac{d}{dx}$.
So, $\left({D}^{2}-3D+2\right){y}_{p}=2{e}^{x}⇒\left(D-1\right)\left(D-2\right){y}_{p}=2{e}^{x}⇒$
${y}_{p}=\frac{1}{\left(D-1\right)\left(D... | {} |
# How do you evaluate cos^(-1) [cos((-5pi)/3)]?
Jul 21, 2017
$\frac{- 5 \pi}{3}$
#### Explanation:
${\cos}^{-} 1 \left[\cos \left(\frac{- 5 \pi}{3}\right)\right]$
Let ${\cos}^{-} 1 \left[\cos \left(\frac{- 5 \pi}{3}\right)\right] = \theta$ , then
$\cos \theta = \cos \left(\frac{- 5 \pi}{3}\right)$
$\therefore \t... | {} |
# Resistors
Resistors - ¼ Watt, Metal Film, 1% tolerance
Package of 5
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet. Package of 5. These resistors are perfect for pedal builders! 1/4 watt.
$0.45 Resistors - 0.5 Watt, Met... | {} |
# Calculating and improving time and memory complexity
private static int Sum (int[] a, int from, int to){
int total=0;
for (int i=from; i <= to; i++)
res += a[i];
}
public static int Method3 (int []a){
int temp=0;
for (int i=0; i <= a.length; i++)
{
for (int j=0; j <= a.length; j++)
{
int c = Sum(a,i,j);
if (c%3 == ... | {} |
### kenya vertical cylindrical tank chemical volume
Tank Volume Calculator for Ten Various Tank ShapesApr 17, 2019 · Cylindrical tank volume formula. To calculate the total volume of a cylindrical tank, all we need to know is the cylinder diameter (or radius) and the cylinder height (which may be called length, if it'... | {} |
Opuscula Math. 40, no. 3 (2020), 375-382
https://doi.org/10.7494/OpMath.2020.40.3.375
Opuscula Mathematica
# A note on bipartite graphs whose [1,k]-domination number equal to their number of vertices
Narges Ghareghani
Iztok Peterin
Pouyeh Sharifani
Abstract. A subset $$D$$ of the vertex set $$V$$ of a graph $$G$$ i... | {} |
# Integral $\int_0^\infty \log(1-e^{-a x})\cos (bx)\, dx=\frac{a}{2b^2}-\frac{\pi}{2b}\coth \frac{\pi b}{a}$
$$\mathcal{J}:=\int_0^\infty \log(1-e^{-a x})\cos (bx)\, dx=\frac{a}{2b^2}-\frac{\pi}{2b}\coth \frac{\pi b}{a},\qquad \mathcal{Re}(a)>0, b>0.$$ I tried to write $$\mathcal{J}=-\int_0^\infty \sum_{n=1}^\infty\fr... | {} |
# 66389
## Автор(ов):
1
Параметры публикации
Тезисы доклада
## Название:
Complex of n-groupoids and derivations of group algebras
## Наименование конференции:
• International Workshop on Operator Theory and its Applications (IWOTA 2019, Lisbon)
## Наименование источника:
• Abstracts of the International Works... | {} |
# Is this series of quotes valid Python?
Python string parsing has quite a few edge cases. This is a string:
"a"
Putting 2 strings immediately after each other implicitly concatenates them, so this is also a string:
"a""a"
However, if you put 3 quotes in a row, it will create a "triple quoted string" which can o... | {} |
# Finding Julia set of $f(z)=z^2-1$
I am trying to determine the Julia set of $$f(z)=z^2-1$$. The fixed points are at $$z=\frac{1\pm\sqrt{5}}{2}$$ and I can see that for $$|z|>\frac{1+\sqrt{5}}{2}$$, then $$|f(z)|>|z|$$, so that $$|f^n(z)|$$ is a strictly increasing sequence.
So either $$|f^n(z)|\rightarrow\infty\Rig... | {} |
# Performance and Prediction¶
## Model Performance¶
Given a trained H2O model, the h2o.performance() (R)/model_performance() (Python) function computes a model’s performance on a given dataset.
Notes:
• If the provided dataset does not contain the response/target column from the model object, no performance will be... | {} |
# Description¶
The stack_refs step is one of the coronagraphic-specific steps in the coron sub-package and is part of Stage 3 calwebb_coron3 processing. It takes a list of reference PSF products and stacks all of the per-integration images contained in each PSF product into a single 3D data cube. This operation prepar... | {} |
# RF's question at Yahoo! Answers (linear independence, Wronskian).
#### Fernando Revilla
##### Well-known member
MHB Math Helper
Here is the question:
So I have a question from the topic of differential equations about linear independence/Wronskian...
The problem states: In this problem, determine whether the func... | {} |
# Fluctuating string in AdS black hole
People frequently use fluctuating string in AdS black hole (see 1,2,3 etc) to study dynamics of a "free external quark" in quark-gluon-plasma (QGP) at finite temperature. The background black hole geometry induces a black hole in the string world sheet. Many interesting results a... | {} |
Semi-empirical mass formula [closed]
The mass formula is given by
$M(Z,A) = ZM_{p}+(A-Z)M_{n}-a_{1}A+a_{2}A^\frac{2}{3}+a_{3}\frac{Z(Z-1)}{A^\frac{1}{3}}+a_{4}\frac{(Z-A/2)^2}{A}+a_{5}A^\frac{-1}{2}$
So I am just wondering here what the $M(Z,A)$ stands for. Is it the actual mass of the atom which is obtained empiric... | {} |
Reference for: the Bruhat-minimal permutations not less than a fixed permutation pi?
Let $\pi\in S_n$. I recently needed to understand the permutations $\rho$ such that $\rho\not\leq\pi$ in Bruhat order. Since there are $O(n!)$ of those I really wanted a description of the $O(n^2)$ minimal such.
I have a satisfying (... | {} |
A quadrilateral is a four-sided closed figure, where each side is a straight line.
The angle sum of a quadrilateral is 360°. You can view a quadrilateral as being composed of two 180- degree triangles:
A parallelogram is a quadrilateral in which the opposite sides are both parallel and congruent. Its area is base × h... | {} |
# Biomedical signals
The acquisition and processing of bioelectrical signals that appear in the human body is a common theme in clinical studies for evaluating the health status of a patient. The electrical activity of cells and tissue can be recorded from different organs. Examples of bioelectrical recordings are the... | {} |
# 1905. Count Sub Islands
• Time: $O(mn)$
• Space: $O(mn)$
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 class Solution { public: int countSubIslands(vector>& grid1, vector>& grid2) { int ans = 0; for (int i = 0; i < grid2.size(); ++i) for (int j = 0; j < grid2[0].size(); ++j) if (grid2[... | {} |
## Basic College Mathematics (10th Edition)
The area is $206.0$ cm$^{2}$.
1. Using the formula $\pi r^{2}$, find the area of the circle Note: The radius is $(16.2 \div 2) = 8.1$ cm Let $A=$ the area of the circle $A = \pi r^{2}$ $A = 3.14 \times (8.1^{2})$ $A = 3.14 \times 65.61$ $A = 206.015$ cm$^{2}$ $A = 206.0$ cm$... | {} |
### XACC 280 CheckPoint: Ratio, Vertical, and Horizontal Analyses
Asked by 2 years ago
19.9 billion brain cells
CheckPoint: Ratio, Vertical, and Horizontal Analyses__
The calculations you perform for this CheckPoint form the basis of your analysis of your capstone
project.
Write in 100 to 200 words an explanation ... | {} |
# AVL tree for inserting and searching
I have made an AVL tree. It works and does what it needs to do. I only need it to insert and search. I am comparing how long it takes to load and search a dictionary file in relation to other various data structures. My AVL tree takes 25 seconds to load the file.
This is in comp... | {} |
# Junk Drawer
For all those little papers scattered across your desk
# Re: Coding the Impossible: Palindrome Detector with a Regular Expressions
12 Feb 2020 in Blog
Another internet post sparks a small rant.
(This is a follow-up of my previous article on the Fundamentals of Computation.)
## Do you remember?
Earl... | {} |
This is an archived static version of the original phylobabble.org discussion site.
# File format for defining a taxnomony and clades on a tree
lczech
Hi all,
does anyone know of a (halfway standardized) file format or annotation scheme for taxonomies and/or for identifying clades on a tree?
One of our programs, S... | {} |
# Power Spectra for "Blue" and Uniform Noise
The previous post provided some code for generating Poisson disc noise (in which no point the sample is closer than some fixed distance from any other). Here is a short program to calculate the power spectrum of this noise and compare it with the spectrum for the same numbe... | {} |
# Revision history [back]
### What does isContourConvex actually do?
Hi,
I am using isContourConvex to remove some contours in my image and it also works quite well. But now I want to know what the function actually does? I found some threads where it says, that isContourConvex can distinguish between closed and ope... | {} |
# Is $\mathsf{P} = \mathsf{NP}$ relative to a universal predictor?
Consider any language $L$. Define $s(L) \in {\lbrace 0, 1 \rbrace}^\omega$ (an infinite sequence of bits) by the recursive formula
$$s(L)_n=\chi_L(s(L)_{<n})$$
Here $\chi_L$ is the characteristic function of $L$ i.e. $\chi_L(w)=1$ for $w \in L$, $\ch... | {} |
# 2014 seminar talk: Folding Up (Disjunctions)
Talk held by Peter Schuster (Pure Mathematics, University of Leeds, UK) at the KGRC seminar on 2014-01-09.
### Abstract
The characteristic axiom of many an ideal object in algebra and logic (prime ideal, ultrafilter, valuation ring, linear order, complete theory, etc.) ... | {} |
Introduction to price elasticity of demand. If price increases by 10% and demand for CDs fell by 20%; Then PED = -20/10 = -2.0 If the price of petrol increased from 130p to 140p and demand fell from 10,000 units to … For our examples of price elasticity of demand, we will use the price elasticity of demand formula. The... | {} |
## Saturday, October 19, 2019
### Missing data in Factor Models
Serena Ng's site is back. Her new paper with Jushan Bai, "Matrix Completion, Counterfactuals, and Factor Analysis of Missing Data", which I blogged about earlier, is now up on arXiv, here. Closely related, Marcus Pelger just sent me his new paper with R... | {} |
# State Evolution Plot
## Description
The State Evolution Plot is used to visualize the evolution of the probability density of a state over space and time.
## Input
The node has the following input:
• Time-evolving state ($\psi_n$): A state evolving dynamically over time
## Content
The plot displays the probabi... | {} |
58k views
### Does it make sense to add a quadratic term but not the linear term to a model?
I have a (mixed) model in which one of my predictors should a priori only be quadratically related to the predictor (due to the experimental manipulation). Hence, I would like to add only the ...
18k views
### Is there a dif... | {} |
Next: MODEL OF HETEROGENEOUS RESERVOIRS Up: Berryman: Bounds on geomechanical Previous: ELASTICITY OF LAYERED MATERIALS
# CONSTANT BULK MODULUS
As a first result, consider a laminated grain composed of isotropic constituents, all having the same bulk modulus K in each layer, but differing shear moduli. Then, if we de... | {} |
blueollie
Indifference…
Workout notes: weights went fine, the run was a mental struggle.
pull ups: 5 sets of 10 (ok), rotator cuff
bench: 10 x 135, 6 x 170, 5 x 170 (rotator cuff)
incline: 10 x 135
military: 3 sets of 10 x 40 dumbbell, standing.
machine stuff: 3 sets of 10 x 110 row
machine stuff: 3 sets of 10 x 130... | {} |
CHAPTER
I.TEXT
A. Text
B. Text
In main body, I use
\usepackage{titlesec}
\titlelabel{\thetitle.\ }
\renewcommand\thesection{\Alph{section}}
\renewcommand\thesubsection{\arabic{subsection}}
A. Text
paragraphs
1.Text
paragraphs
And it works well.
But when I use
\tableofcontents
to create the contents, it s... | {} |
# RabbitIO: A Tool to Backup and Restore Messages from RabbitMQ
Are you working with an ocean of microservices connected together by a message broker like RabbitMQ? Then there is a chance you have experienced queues filling up and messages not reaching their destination, most likely due to stability issues in your arc... | {} |
# Jensen's forcing at an inaccessible
This is a talk at the 16th International Luminy Workshop in Set Theory, CIRM, September 14, 2021 (virtual).
Slides
Jensen constructed in $L$, using $\diamondsuit$, a subposet of the Sacks forcing with the ccc and the property that it adds a unique generic real over $L$ (in contra... | {} |
B??K*B??K*, Bd0??KS and new physics
@article{Datta2008BKBKBA,
title={B??K*B??K*, Bd0??KS and new physics},
author={Alakabha Datta and Maxime Imbeault and David London},
journal={Physics Letters B},
year={2008}
}
• Published 18 November 2008
• Physics
• Physics Letters B
2 Citations
References
SHOWING 1-10 OF 44 REFE... | {} |
# 22 Importing Tables in R
In this chapter, you will learn the basics for importing data tables in R.
## 22.1 Abalone Data Set
The data set for this lab is the Abalone Data Set that is part of the UCI Machine Learning Repository
The location of the data file is:
http://archive.ics.uci.edu/ml/machine-learning-datab... | {} |
In a vapour compression refrigeration cycle, the refrigerant enters the compressor in saturated vapour state at evaporator pressure, with specific enthalpy equal to $250$ $\text{kJ/kg}$. The exit of the compressor is superheated at condenser pressure with specific enthalpy equal to $300$ $\text{kJ/kg}$. At the condense... | {} |
## Files in this item
FilesDescriptionFormat
application/pdf
4678.pdf (16kB)
AbstractPDF
## Description
Title: AN ALGEBRAIC DVR APPROACH TO DESCRIBE THE STARK EFFECT Author(s): Bermúdez Montaña, Marisol Contributor(s): E, Orgaz Baque; Lemus, Renato ; Rodríguez Arcos, Marisol Subject(s): Theory and Computation Abs... | {} |
WB JEE
Physics
Laws of Motion
Previous Years Questions
A shell of mass 10 kg is moving with a velocity of 10 ms$$-$$1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the 1st mass ...
Force required to move a mass of 1 kg at rest on a horizontal rough plane ($$\mu$$ = 0.1 and g = 9.8 m/s2) is
... | {} |
# Interpreting a pattern in a residual plot produced by gam.check()
I'm working on creating a model that examines the effect of ocean characteristics on fishing outcomes. I have spatial data on a 0.5 degree grid and I created the following model:
gam(inverse hyperbolic sine(yvar) ~ s(lat, lon, bs="sos") + s(xvar1) +
... | {} |
## Algebra: A Combined Approach (4th Edition)
$2,400 = 2.4 \times 10^3$
Move the decimal point until the number is between 1 and 10. $2,400.$ -> $2.400$ The decimal point is moved 3 places and the original number is 10 or greater, so the count is positive 3. $2,400 = 2.4 \times 10^3$ | {} |
The ER is a central element in Ca2+ signaling, both as a modulator of cytoplasmic Ca2+ concentration ([Ca2+]i) and as a locus of Ca2+-regulated events. During surface membrane depolarization in excitable cells, the ER may either accumulate or release net Ca2+, but the conditions of stimulation that determine which form... | {} |
# Equations of tangent and normal to a curve
• January 7th 2008, 04:59 PM
chibiusagi
Equations of tangent and normal to a curve
I'm lost on the sequence of doing this
Find the tangent and normal to the curves at the points indicated
y=2x^2-4x+1 where the gradient is 4
• January 7th 2008, 05:04 PM
Jhevon
Quote:
Origi... | {} |
### DEGREE AND SOBOLEV SPACES
Auteur(s):
Code(s) de Classification MSC:
Résumé: Soit $\Lambda \subset \R^k$ un ouvert connexe et soit $u \in W^{1,n+1} (S^n \times \Lambda, S^n)$. Pour presque tout $\lambda \in \Lambda$, l'application $x \mapsto u(x,\lambda)$ appartient à $W^{1,n+1} (S^n,S^n)$ et donc elle est contin... | {} |
# Definition:Matrix/Lower Triangular Elements
## Definition
Let $\mathbf A = \sqbrk a_{m n}$ be a matrix.
The elements $a_{i j}: i > j$ are called the lower triangular elements.
## Also known as
Some sources refer to lower triangular entries. | {} |
Contents
# Contents
## Statement
###### Proposition
(Todd class in rational cohomology is Chern character of Thom class)
Let $V \to X$ be a complex vector bundle over a compact topological space. Then the Todd class $Td(V) \,\in\, H^{ev}(X; \mathbb{Q})$ of $V$ in rational cohomology equals the Chern character $ch$... | {} |
"Fossies" - the Fresh Open Source Software Archive
Member "ragel-6.10/doc/ragel-guide.tex" (24 Mar 2017, 145262 Bytes) of package /linux/misc/ragel-6.10.tar.gz:
As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) TeX and LaTeX source code syntax highlighting (... | {} |
# tf.metrics.precision_at_thresholds
tf.metrics.precision_at_thresholds(
labels,
predictions,
thresholds,
weights=None,
metrics_collections=None,
name=None
)
Computes precision values for different thresholds on predictions.
The precision_at_thresholds function creates four local variables, true_positives, true_neg... | {} |
### 71. Simplify Path
Given an absolute path for a file (Unix-style), simplify it.
For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c"
click to show corner cases.
Corner Cases:
• Did you consider the case where path = "/../"?
In this case, you should return "/".
• Another corner case is the ... | {} |
# I Cgs or SI in quantum field theory?
Tags:
1. Mar 9, 2017
I have an acquaintance who maintains that in quantum field theory, primarily the cgs system is used. OK, I know it's not really important, but I was under the impression that everyone had switched to SI. (My book on quantum field theory has very few actual q... | {} |
# Kinemetic Equations.
Sylis
I just have a general question. When is it okay to assume that Initial Velocity is 0 m/s?
For instance I have this question:
A football is kicked straight up into the air; it hits the ground 3.8s later.
Do I assume that the initial Velocity is 0 m/s? Or do I assume that I'm only concerne... | {} |
Kaththi Sandai Full Movie Tamilrockers, Gamestop Collectible Figures, D&d Dimension Door Item, Smu Computer Science Singapore, Constantine And The Bible, Livelihood Security Meaning, Access To Higher Education Solihull College, " /> Kaththi Sandai Full Movie Tamilrockers, Gamestop Collectible Figures, D&d Dimension Doo... | {} |
+1-415-315-9853
info@mywordsolution.com
Algebra Math Calculus Physics Chemistry Biology Earth Science Physiology History Humanities English Sociology Nursing Science
Problem 1
Two horses pull horizontally on ropes attached to a stump. The two forces $$\texttip{\vec {F_1}}{F_1_vec}$$ = 1230$${\rm N}$$ and $$\vec{F}... | {} |
Numerically calculating the divergence of a set of oriented points
Say I have a set of oriented points at locations $\vec{v_i}$ with each some direction $\vec{n_i}$, in practice they represent the normals of some surface that has been non uniformly sampled. How would I calculate the divergence of this vector field? St... | {} |
# Equivariant Venice Lemma
In the paper J. Simons and D. Sullivan. Structured vector bundles define differential K-theory, one of the key ideas is the so called Venice Lemma, which essentially can be stated as
Theorem: For every exact even differential form $$\omega$$ on a smooth manifold $$M$$, there is a trivial ve... | {} |
# A Note on Metcalfe's Law, Externalities and Ecosystem Splits
2017 Jul 27 See all posts
A Note on Metcalfe's Law, Externalities and Ecosystem Splits
Looks like it's blockchain split season again. For background of various people discussing the topic, and whether such splits are good or bad:
Given that ecosystem sp... | {} |
# Circle A has a center at (6 ,2 ) and an area of 45 pi. Circle B has a center at (2 ,3 ) and an area of 75 pi. Do the circles overlap?
(x-6)^2+(y-2)^2=(3sqrt5)^2 graph{(x-6)^2+(y-2)^2=(3sqrt5)^2 [-37.54, 37.55, -18.77, 18.77]}
${\left(x - 2\right)}^{2} + {\left(y - 3\right)}^{2} = {\left(5 \sqrt{3}\right)}^{2}$ | {} |
# COMPUTATIONAL MOLECULAR SPECTROSCOPY OF FeCN IN THE $^6\Delta$ ELECTRONIC GROUND STATE
Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/31311
Files Size Format View
abstract.gif 30.66Kb GIF image
Title: COMPUTATIONAL MOLECULAR SPECTROSCOPY OF FeCN IN THE $^6\Delta$ ELECTRONIC GR... | {} |
# Calculus
Calculus Level 4
$$\displaystyle \int\frac{7x^{13}+5x^{15}}{\left(x^7+x^2+1\right)^3}dx = \frac{1}{a}\cdot \frac{x^{b}}{\left(x^7+x^2+1\right)^c}$$
Given that the indefinite integral above is true, then what is the value of $$a+b+c,$$ where $$a,b,\text{ and }c$$ are positive integers?
× | {} |
Now showing items 1-20 of 53
• #### 3Λh and 3‾Λ‾h lifetime measurement in Pb–Pb collisions at √sNN = 5.02 TeV via two-body decay
(Journal article; Peer reviewed, 2019)
An improved value for the lifetime of the (anti-)hypertriton has been obtained using the data sample of Pb–Pb collisions at TeV collected by the ALI... | {} |
Frequently Asked Question List for TeX
# Better script fonts for maths
The font selected by \mathcal is the only script font “built in”. However, there are other useful calligraphic fonts included with modern TeX distributions.
• Euler The eucal package (part of most sensible TeX distributions; the fonts are part of... | {} |
# Foulkes’ Conjecture Analogs
The original Foulkes‘ conjecture, which dates back to 1949, was stated as a “theorem” (at page 206 of paper) but with no claim that there actually was a proof. As it is, more than 75 years later, the conjecture is still open (with several interesting advances). The conjecture asserts tha... | {} |
# For a system to be causal, number of finite zeros <= number of finite poles. Why?
I read in this pdf that for a system to be causal, the number of finite zeros must be no greater than number of finite poles. Why?
I know that for a system to be causal, $h[n]=0$ for all $n<0$. Can you give an explanation how the stat... | {} |
# Numerical quadrature for the complex antiderivative
My goal is to take a complex-differentiable function $f:\Bbb C\rightarrow\Bbb C$ and a value $z$ and approximate $F(z)$, where $F$ is one of the functions such that $F^\prime(z)=f(z)$ for all $z$. Now, if $f$ was a real function, this would be simple; one could jus... | {} |
Reports of 19787
DetChar (General)
shoichi.oshino - 9:14 Tuesday 09 August 2022 (21739) Print this report
SummaryPage trouble: process was stopped from 8/8 7:00 UTC
SummaryPage GIF process was stopped from 8/8 7:00 UTC.
I deleted this process.
After this work, SummaryPage starts to create plots.
DetChar (General)
shoic... | {} |
## rebeccaskell94 Group Title Given the triangle below, which of the following is a correct statement? http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0403_02/image0114e2eb87b.gif sec right triangle C=3/7 cot right triangle B=3/2 sec right triangle B= 7/3 cot right triangle C =1 / 2 ... | {} |
# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions
19-24 May 2014
Europe/Zurich timezone
## Neutral meson measurement via photon conversions in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with ALICE at the LHC
20 May 2014, 16:30
2h
Board: E-24
Poster Jets
### ... | {} |
5 February 2019
# The Big Picture
1. Knowing the sampling distribution of a statistic tells us about statistical uncertainty (standard errors, biases, confidence sets)
2. The bootstrap principle: approximate the sampling distribution by simulating from a good model of the data, and treating the simulated data just l... | {} |
Definitions
# Completeness
[kuhm-pleet]
In general, an object is complete if nothing needs to be added to it. This notion is made more specific in various fields.
## Logical completeness
In logic, completeness is the converse of soundness for formal systems. A formal system has "completeness" when all tautologies a... | {} |
# Basic of Real-Time Spectrum Analyzer
#### Kittu20
Joined Oct 12, 2022
200
I am looking for help to understand the basics of real time spectrum analyzer developed by microcontroller.
A real-time analyzer is a system that displays the frequency spectrum of an audio signal.
This figure gives me a good start but stil... | {} |
## Why are time series so interesting ?
A time series can tell us about how a particular parameter (green cover, water area, etc.) varies with time.
The idea is that if we can understand the processes that cause the changes, we may be able to model and predict future changes.
This and much more to be discovered in t... | {} |
# Is it possible to learn ring theory if one's familiar, but not good at group theory?
Is it possible to learn ring theory if one is familiar with but not good at group theory?
Background: I’m using Dummit and Foote's Abstract Algebra, and I am an undergrad.
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Rings have more structure than groups due to the presenc... | {} |
# Feit-Thompson theorem
An important result in the classification of all finite simple groups, the Feit-Thompson theorem states that every non-Abelian simple group must have even order.
The only known proof requires 255 pages.
## 1 References
Feit, W. and Thompson, J. G., Solvability of groups of odd order, Pacific... | {} |
## Encyclopedia > Yellowstone
Article Content
# Yellowstone National Park
Redirected from Yellowstone
Yellowstone National Park, located in the states of Idaho, Montana, and Wyoming is the first and oldest national park in the world. It covers 8,983.210 km² (2,219,790.71 acres) mostly in the northwest corner of Wyo... | {} |
## Lecture 15: Gaussian Processes
### Properties of Multivariate Gaussian Distributions
We first review the definition and properties of Gaussian distribution:
A Gaussian random variable $X\sim \mathcal{N}(\mu,\Sigma)$, where $\mu$ is the mean and $\Sigma$ is the covariance matrix has the following probability densit... | {} |
It has been shown in the bullfrog, Rana catesbeiana Shaw 1802,that certain forelimb muscles in males have different contractile properties when compared with females, which may result from adaptation for amplexus. We extended this study to a distantly related species, Bufo marinusLinnaeus 1758, by testing the isometric... | {} |
# Difference between proper and comoving frames
I'm reading this book "Introduction to Quantum Fields in Classical Backgrounds" by Mukhanov & Winitzki, and there in the chapter 8 "The Unruh Effect" they introduce 3 reference frames.
Laboratory Frame: "is the usual inertial reference frame with the coordinates $(t,x,y... | {} |
January 1999 (Volume 8, Number 1)
# Apker Awards
## APS Honors Undergraduates With 1999 Apker Awards
Apker Award finalists (f) and judges (sc). [Rear, from left: Michael Brown (sc), Ali Kinkhabwala (f), Carl Steinke (f), and Laurence Marschall (sc). Front, from left: Harry Lustig (sc), Gwendolyn Bell (recipient), B... | {} |
## 27 December 2015
### NIPS 2015 Retrospective
There have already been lots of really nice overviews of NIPS 2015. I don't have much to add, largely because I missed almost every talk and a large fraction of the poster sessions.
Before beginning, I'm really happy and somewhat humbled to have been able to participat... | {} |
### “受阻路易斯酸碱对”催化的不对称氢化反应
1. 中国科学院化学研究所 中国科学院分子识别与功能重点实验室 北京 100190
• 投稿日期:2014-04-30 发布日期:2014-05-14
• 通讯作者: 杜海峰 E-mail:haifengdu@iccas.ac.cn
• 基金资助:
项目受国家自然科学基金优秀青年基金（No.21222207）资助.
### Frustrated Lewis Pair Catalyzed Asymmetric Hydrogenation
Liu Yongbing, Du Haifeng
1. CAS Key Laboratory of Molecular Recognition... | {} |
## Algebra 1
$15c$
"The product of" means multiplication. Therefore, the product of 15 and $c$ is equal to 15 times $c$, or $15c$. | {} |
# All Questions
2 views
### Model estimation procedure by using Backward elimination
I have been run the multiple linear model by using minitab. the result showed that all variables are not significant. so, I use the method backward elimination. Lastly, I found that one variable is ...
5 views
### Model specificati... | {} |
# A Semi-literate Emacs Configuration
Note: This configuration has been deprecated. I no longer maintain a literate configuration file, but will keep this page up to avoid link decay (20Apr20).
This doesn't mean there's anything wrong with it, just that I didn't want to go on curating it in the current form. Everythin... | {} |
# zbMATH — the first resource for mathematics
Quaternary quadratic forms: computer generated tables. (English) Zbl 0727.11018
New York etc.: Springer-Verlag. vi, 155 p., with a diskette DM 118.00 (1991).
This book contains tables of reduced representations of each class of integral positive definite primitive quaterna... | {} |
# Introspection and reflection with LaTeX/TeX macros
Below is a short program that can use \meaning and \string to let a combination of LaTeX and TeX commands to print out the listing of macros. Unsurprisingly (nothing can surprise me with TeX any more), the command can also list its own listing.
\makeatletter
\parin... | {} |
### Iterated Inhomogeneous Polynomials
Jiaxin Guan and Mark Zhandry
##### Abstract
Let $p$ be a polynomial, and let $p^{(i)}(x)$ be the result of iterating the polynomial $i$ times, starting at an input $x$. The case where $p(x)$ is the homogeneous polynomial $x^2$ has been extensively studied in cryptography. Due t... | {} |
# 8.15.3.22 IfcRoundedRectangleProfileDef
## 8.15.3.22.1 Semantic definition
IfcRoundedRectangleProfileDef defines a rectangle with equally rounded corners as the profile definition used by the swept surface geometry or the swept area solid. It is given by the X extent, the Y extent, and the radius for the rounded co... | {} |
In my final year project I have been dealing a lot with gravitational lensing by a Schwarzschild black hole. The famous formula for the bending angle (in units of $c = G = 1$) is this:
This formula forms the basis for one of the key observational confirmations of Einstein’s theory of General Relativity (GR). The Newto... | {} |
# Change the distance dimension of a line as a decoration in TikZ
How I can change the distance dimension like the picture below. In the \dim={add dim, distance} have two parameter I want to add 1 parameter for distance of dimesion like picture 1 , and rolate the text in picture 2.
\documentclass{article}
\usepackage... | {} |
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