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# oobLoss
Out-of-bag classification error
## Syntax
```L = oobLoss(ens) L = oobLoss(ens,Name,Value) ```
## Description
`L = oobLoss(ens)` returns the classification error for `ens` computed for out-of-bag data.
`L = oobLoss(ens,Name,Value)` computes error with additional options specified by one or more `Name,Val... | {} |
# A beam of red light has twice the intensity as a second bean of the same color
1. May 11, 2008
### looi76
1. The problem statement, all variables and given/known data
A beam of red light has twice the intensity as a second bean of the same color. Calculate the ratio of the amplitude of wave.
2. Relevant equations... | {} |
# Boost /step up converter efficient and very small for high current ? (with example)
Here you have a view of the external battery of Energizer (XP18000A) of 18 000 mAh.
Energizer allows DC 19V, 3.5A in output : 19*3.5 = 67W
There are 2 batteries, so 2*3.7 = 7.4V then batteries allow almost 18A ... (9A for each batt... | {} |
# List of Abbreviations - Latex
This is a short post about generating a list of abbreviations for your document with Latex. While there are many packages available for this, I'm going to use glossaries package. You can find the user mannual of glossaries package from here.
Here is the basic example.
\documentclass[a... | {} |
# Reciprocal Function is Strictly Decreasing/Proof 1
## Theorem
$\operatorname{recip}: \R \setminus \set 0 \to \R$, $x \mapsto \dfrac 1 x$
on the open interval $\openint 0 \to$
on the open interval $\openint \gets 0$
## Proof
Let $x \in \left ({0 \,.\,.\, +\infty} \right)$.
By the definition of negative powers:
$... | {} |
# Pseudo Inverse os a 2x2
1. Nov 8, 2008
### ahamdiheme
1. The problem statement, all variables and given/known data
To determine the pseudoinverse of this matrix.
1 1
2 2
2. Relevant equations
I find it difficult writing out the equation properly so i have attached it as a doc file.
3. The attempt at a solution
I ... | {} |
# Creating generating functions for integer partitions
Say I have a generating function $\Phi_\mathcal{A}$ for the set of partitions $\mathcal{A}$ which have no parts congruent to 2 mod 4, and I have the generating function for $\Phi_\mathcal{B}$ for the set of partitions $\mathcal{B}$ in which the parts divisible by ... | {} |
# Existence and uniqueness of entropy solutions for a scalar conservation law
Consider the conservation law
$$(\ast) \qquad u_t + \partial_x(u^\alpha) = 0$$ where $$\alpha > 0$$.
For what values of $$\alpha$$ is it known that there exists a (unique) entropy solution for the initial value problem associated to $$(\as... | {} |
# 'Canonical' questions to help address common issues
Short Version
I believe it would be valuable to create a 'canonical' question/answer of sorts for each language, and I am hoping to get others' thoughts on this.
These questions and answers would serve as a central explanation of certain common issues. All answer... | {} |
# Why can a particle decay into two photons but not one?
I recently read an old physics news about the Higgs boson where it was observed to decay into 2 photons and I was wondering why it wouldn't have decayed into a single photon with the combined energy of 2 photons?
## 2 Answers
No massive particle can decay into... | {} |
# Kerodon
$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$
Remark 2.4.4.17. Let $S_{\bullet }$ be a simplicial set. For each $m \geq 0$, Theorem 2.4.4.10 guarantees that $\operatorname{Path}[S]_ m$ can be realized as the path category of a directed graph $G_ m$ (Construction 1.2.6.1), which can be desc... | {} |
# Power function inequality
Let $x$ and $p$ be real numbers with $x \ge 1$ and $p \ge 2$ . Show that $(x - 1)(x + 1)^{p - 1} \ge x^p - 1$ .
I recently discovered this result. I am sure it is known, but it is new to me. It is quite easy to prove if $p$ is an integer, even a negative one. I have a proof in the general ... | {} |
# Properties
Label 1386.2.k.e Level $1386$ Weight $2$ Character orbit 1386.k Analytic conductor $11.067$ Analytic rank $1$ Dimension $2$ CM no Inner twists $2$
# Related objects
## Newspace parameters
Level: $$N$$ $$=$$ $$1386 = 2 \cdot 3^{2} \cdot 7 \cdot 11$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$... | {} |
# Pressure field
Pressure field is a two-component vector force field, which describes in a covariant way the dynamic pressure of individual particles and the pressure emerging in systems with a number of closely interacting particles. The pressure field is a general field component, which is represented in the Lagran... | {} |
List of Set Identities and Relations
Browse the List of Set Identities and Relations below. View Videos or join the discussion on this topic. Add List of Set Identities and Relations to your PopFlock.com topic list for future reference or share this resource on social media.
List of Set Identities and Relations
This a... | {} |
# Is this function injective on a simply connected domain?
Let $\mathbb{D}$ be the unit disk. I am trying to prove the following statement
Let $U\subsetneq \mathbb{C}$ be a simply connected domain. Then there exists an injective holomorphic map $F:U\rightarrow \mathbb{D}$.
The first part of the proof goes something ... | {} |
## What is ChemoSpec2D?
ChemoSpec2D is a collection of functions for exploratory chemometrics of 2D spectroscopic data sets such as COSY (correlated spectroscopy) and HSQC (heteronuclear single quantum coherence) 2D NMR (nuclear magnetic resonance) spectra. ChemoSpec2D deploys methods aimed primarily at classification... | {} |
# Graphs of rational functions
#### Everything You Need in One Place
Homework problems? Exam preparation? Trying to grasp a concept or just brushing up the basics? Our extensive help & practice library have got you covered.
#### Learn and Practice With Ease
Our proven video lessons ease you through problems quickly... | {} |
• ### First Results from CUORE: A Search for Lepton Number Violation via $0\nu\beta\beta$ Decay of $^{130}$Te(1710.07988)
April 1, 2018 hep-ex, nucl-ex, physics.ins-det
The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array r... | {} |
### Julia sets: True shape and escape time
• 303 Replies
• 10866 Views
0 Members and 1 Guest are viewing this topic.
• 3c
• Posts: 812
#### Re: Julia sets: True shape and escape time
« Reply #90 on: November 09, 2019, 07:11:59 PM »
"2+6+13"
z^4+A*z+c with
A=-0.40283203125+0.162109375*i
c=0.3046875+0.8125*i
at le... | {} |
CS 276 Lecture 5 (draft)
Summary
Having introduced the notion of CPA security in the past lecture, we shall now see constructions that achieve it. Such constructions shall require either pseudorandom functions or pseudorandom permutations. We shall see later how to construct such objects.
1. Pseudorandom Functions
... | {} |
RUS ENG JOURNALS PEOPLE ORGANISATIONS CONFERENCES SEMINARS VIDEO LIBRARY PACKAGE AMSBIB
General information Latest issue Archive Impact factor Search papers Search references RSS Latest issue Current issues Archive issues What is RSS
Eurasian Math. J.: Year: Volume: Issue: Page: Find
Eurasian Math. J.... | {} |
## Introduction
Recent developments in experimental neuroscience have considerably increased the availability of novel recordings and reconstructions shedding further light into the structure and function of the brain as well as many other systems. But understanding the complexities behind the relations between struct... | {} |
Lemma 10.129.2. Let $S$ be a finite type algebra over a field $k$. The set of primes $\mathfrak q$ such that $S_{\mathfrak q}$ is Cohen-Macaulay is open in $S$.
Proof. Let $\mathfrak q \subset S$ be a prime such that $S_{\mathfrak q}$ is Cohen-Macaulay. We have to show there exists a $g \in S$, $g \not\in \mathfrak q... | {} |
# Stellar Kinematics in Double-Barred Galaxies: The σ-Hollows
@article{LorenzoCaceres2008StellarKI,
title={Stellar Kinematics in Double-Barred Galaxies: The $\sigma$-Hollows},
author={Adriana de Lorenzo-C'aceres and Jes'us Falc'on-Barroso and Alejandro Vazdekis and Inst. de Astrof. de Canarias and ESA-Estec},
journal=... | {} |
## Fundamentals of Physics Extended (10th Edition)
Vector (a) moves over 4 to the right and 3 down. The magnitude is the hypotenuses of the triangle that is created. Pythagorean's Theorem can be used to find the missing side.---$4^{2}$ + $3^{2}$ =25 $\sqrt 25$ | {} |
Article
# Relativistic Corrections to the Sunyaev-Zeldovich Effect for Clusters of Galaxies. V. Effect of the Motion of the Observer
01/2005; DOI:doi:10.1051/0004-6361:20052923
Source: arXiv
ABSTRACT We extend the formalism of the relativistic thermal and kinematical Sunyaev-Zeldovich effects to the observer's syste... | {} |
# Definition:Null Set
## Definition
Let $\struct {X, \Sigma, \mu}$ be a measure space.
A set $N \in \Sigma$ is called a ($\mu$-)null set if and only if $\map \mu N = 0$.
### Family of Null Sets
The family of $\mu$-null sets, $\set {N \in \Sigma: \map \mu N = 0}$, is denoted $\NN_\mu$.
### Signed Measure
Let $\st... | {} |
## Algebra and Trigonometry 10th Edition
By squaring the binomial $u+v$: $(u+v)^2=(u+v)(u+v)=uu+uv+vu+vv=u^2+2uv+v^2$ By squaring the binomial $u-v$: $(u-v)^2=(u-v)(u-v)=uu-uv-vu+(-v)(-v)=u^2-2uv+v^2$ | {} |
# Obtaining Correct (Least Squares Sense) Affine Transform Parameters Between Two Images
I have two images that I want to compute the affine motion model parameters. The model that I use is $$x' = a_1x+a_2y+a_3$$ $$y' = a_4x+a_5y+a_6$$ To calculate those 6 parameters, I picked 6 points (overdetermined system) between ... | {} |
Scale, Meaning, Pattern, Form: Conceptual Challenges for Quantitative Literary Studies
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Scale, Meaning, Pattern, Form: Conceptual Challenges for Quantitative Literary Studies
Annotation
PII
S207987840001646-9-1
DOI
10.18254/S0001646-9-1
Publication type
Article
Status
Published
Authors
Ed... | {} |
# How do you refute these conjectures that seem imply contradictory statements?
I've formulated two conjectures that seems to imply a strong result when are combined with well known equivalences of the Riemann hypothesis, and I would like to know how get a disproof of such statements.
Let $S(n)=\sum_{k=1}^n\text{n mo... | {} |
# How does smoke move in the air and how can I direct it so it will go to a place I want it to go?
Let us assume there is a closed room with 2 people, only one of them is smoking cigarette.
What equation would describe the smoke from the cigarette spreading? Is it “diffusion”? If so, what are the parameters?
Is ther... | {} |
OpenStudy (anonymous):
Which notation is most universal for derivatives? f'(x0) or df/dx?
OpenStudy (anonymous):
Newton's f' notation is sometimes more convenient, but Leibniz's dy/dx (or df/dx) opens the door to the powerful world of differential equations, making it the more important version. You need to be famil... | {} |
# chainer.utils.type_check.Expr¶
class chainer.utils.type_check.Expr(priority)[source]
Abstract syntax tree of an expression.
It represents an abstract syntax tree, and isn’t a value. You can get its actual value with eval() function, and get syntax representation with the __str__() method. Each comparison operator ... | {} |
# Prove uniqueness of solution to a simple equation
1. Jan 12, 2009
### Irid
1. The problem statement, all variables and given/known data
Prove that the equation $$e^x = 1+x$$ admits the unique solution $$x_0 = 0$$.
2. The attempt at a solution
I think there should be a very simple proof based on monotonicity or ... | {} |
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Earlier today I saw the hundred bazillionth question about how to use the paste function. My initial response was “take a look at example(paste) to see how it works”.
Then I looked at example(paste), and it turns out that i... | {} |
# Calculating SNR of a complex-valued signal correctly
I have an array of complex-valued data. I would like to modify the array by injecting an artificial signal at a chosen Signal to Noise ratio.
I have seen the signal to noise ratio for complex-valued data calculated as:
$$SNR = \frac{}{}$$
Right now, I am assumi... | {} |
# Showing a vector field is not conservative
Let $f: R^n \to R^n$. $||x||$ is Euclidean norm. Define $f(x) = g(||x||)$. where $g: [0, \infty) \to R^n$ is differentiable on $(0, \infty)$. I want to show that $f$ is not conservative on $R^n$. ($g$ is not constant)
### MY Effort:
Write $f(x) = (f_1(x),...,f_n(x))$ and ... | {} |
REPORTS > 2017:
All reports in year 2017:
TR17-034 | 21st February 2017
Karl Bringmann, Christian Ikenmeyer, Jeroen Zuiddam
On algebraic branching programs of small width
In 1979 Valiant showed that the complexity class VP_e of families with polynomially bounded formula size is contained in the class VP_s of families... | {} |
# Chapter 7 - Summary Exercises - Performing Operations with Radicals and Rational Exponents - Page 477: 2
The given radical expression, $\sqrt[15]{x^5} ,$ is not simplified because the exponent in the radicand and the index of the radical have a $GCF$ equal to $5$.
#### Work Step by Step
$\bf{\text{Solution Outline... | {} |
# A parallel section functor for 2-vector bundles
## Christoph Schweigert and Lukas Woike
We associate to a 2-vector bundle over an essentially finite groupoid a 2-vector space of parallel sections, or, in representation theoretic terms, of higher invariants, which can be described as homotopy fixed points. Our main ... | {} |
# TexWorks on Windows 7 is not showing compile-time errors [closed]
If I compile a LaTeX file using TexWorks on Windows 7, if there is a problem with my LaTeX file, the compile time error is not shown in the console at the bottom of the window. Instead, compilation terminates. It will show overfull hbox errors, stuff ... | {} |
# Tag Info
92
I think this is the easiest option! --- title: "Title" author: "Me" header-includes: - \usepackage{bbm} output: pdf_document --- (Edited to have three, instead of four, hyphens to open and close the YAML front-matter)
54
Here's Pandoc-based solution. You will have to enable --shell-escape for this to ... | {} |
## E X Log
E X Log. 'log' is short for 'logarithm' ' ≈ ' means 'approximately equal to' 'ln' stands for natural log log e x is usually written as 'ln (x)' ln (9) = x is e x = 9 in natural logarithmic form notes a logarithm is the. Loge(x) is the same as ln(x).
The value of `1+(log_(e)x)+(log_(e)x)^(2)/(2!)+(log_(e)x)... | {} |
# Is the combine_results method deprecated in qiskit v0.20.0
According to the ManagedResults Documentation the class has a combine_results method, however when attempting to use it as follows:
job_set = IBMQJobManager().run(circs, backend=ibmq_backend, name='job-set-abc')
job_results = job_set.results()
job_results_c... | {} |
R Basic
R Basic Information Helpful Links As seen of all the high school sports all the times has been put beneath some bright lights, green lights. Everything in this world, from one man to the next, is by design, built into the world, and under the pressing sun. On the playing field there is a variety of things that... | {} |
# Particular Ehrenpreis factorization for covariance function
Let $$f:\mathbb{R}^d\to\mathbb{R}$$ be a smooth compactly supported covariance function of a stationary random fields (hence positive definite).
Is there a compactly supported function $$g:\mathbb{R}^d\to \mathbb{C}$$ such that $$g\ast g=f$$ ?
Using Fouri... | {} |
When we want to store data persistently, using relational databases is often the safest choice, not only because of the richness and stability of today’s relational databases, but also because the support for relational databases in different communities is very complete. In this article, we will analyze an important c... | {} |
My bibliography Save this paper
# Monotone Methods for Equilibrium Selection under Perfect Foresight Dynamics
## Author
Listed:
• Josef Hofbauer
• Daisuke Oyama
• Satoru Takahashi
## Abstract
The paper studies equilibrium selection in supermodular games based on a class of perfect foresight dynamics, introduced b... | {} |
# Why do ethers resist oxidation?
To put it simply, ethers resist oxidation to the point where strong $C - O$ bonds are cleaved, and reformed.
The ether linkage, the $C - O - C$ bond, is strong as bonds go. Of course, we can form $C = O$ bonds, but we can only do so if we break the $C - C$ and $C - O$ skeleton. | {} |
## real analysis – Can we construct a computable sequence of trigonometric polynomials that converges pointwise to a given continuous function defined on the Torus?
Consider any continuous function $$f$$ on an $$m$$-dimensional Torus $$mathbb{T}^m$$. Can we construct a sequence of band limited functions (trigonometric... | {} |
# Getting Started / Basic Structures
The basic data type in PCL 1.x is a :pcl:PointCloud<pcl::PointCloud>. A PointCloud is a C++ class which contains the following data fields:
• Specifies the width of the point cloud dataset in the number of points. width has two meanings:
• it can specify the total number of point... | {} |
# Colección
Música » My Heart To Joy »
## The Hours Change So We Don't Have To
9 scrobblings | Ir a la página del tema
Temas (9)
Tema Álbum Duración Fecha
The Hours Change So We Don't Have To 1:49 9 Abr 2012, 22:46
The Hours Change So We Don't Have To 1:49 9 Abr 2012, 22:37
The Hours Change So We Don't Have To 1:49... | {} |
# Why does branching decrease density and melting point?
The general explanation given is that the chains are further apart, so the intermolecular forces are less, and as they are further apart, they occupy more volume, and the density is lesser. But the length of each chain (and thus its mass) also increases, so how ... | {} |
## Give an example of matrix space x
Always be careful of the order in which you multiply matrices. For instance, if you are given B and C and asked to solve the matrix equation AB = C for A, you. Get an answer for 'Give an example of a non-diagonalizable 4x4 matrix with eigenvalues: -1, -1, 1, 1.' and find homework h... | {} |
My Math Forum Cost Retail At Method
Algebra Pre-Algebra and Basic Algebra Math Forum
May 24th, 2013, 05:02 PM #1 Newbie Joined: May 2013 Posts: 23 Thanks: 0 Cost Retail At Method Spring Dress shop's inventory at cost on January 1 was $39,000. Its retail is$59,000. During the year, Spring purchased additional merc... | {} |
location: Publications → journals
Search results
Search: MSC category 11P05 ( Waring's problem and variants )
Expand all Collapse all Results 1 - 2 of 2
1. CJM 2002 (vol 54 pp. 417)
Wooley, Trevor D.
Slim Exceptional Sets for Sums of Cubes We investigate exceptional sets associated with various additive p... | {} |
# Question #7023b
Oct 24, 2016
So there are $6 \cdot 7 = 42$ ways
(2)The number of ways is $\frac{10 \cdot 9}{1 \cdot 2} = 45$ ways | {} |
# American Institute of Mathematical Sciences
2018, 14(1): 249-265. doi: 10.3934/jimo.2017045
## A mean-field formulation for multi-period asset-liability mean-variance portfolio selection with probability constraints
1 School of Mathematical Sciences, South China Normal University, Guangzhou 51061, China 2 Departm... | {} |
Another day with a section of convoluted validation rules and a series of items to be validated. Today’s rules apply to a string, and I’ll actually use a recursive algorithm to generate a single regex string that can then be applied to each input to check validity. It gets slightly more difficult in the second part, wh... | {} |
# Styling the print headers and footers
#### Paul Walk
11 Dec, 2013 04:09 PM
I appreciate the addition of headers and footers for printing (actually I use them for producing paginated PDFs rather than printing as such, but same difference).
What I would like is the ability to apply simple styling to these - font an... | {} |
### Mach Number
• Differentiate between various processes of expansion and compression
• Determine the sonic velocity in a fluid.
• Describe the effect of Mach number in flow.
The local speed of sound in an ideal gas is given by:
$c = \sqrt{kRT}$
where,
c = local speed of sound
k = ratio of specific heats = $\dfr... | {} |
Fulfilling Pythagoras' Dream using Nonstandard Models of Arithmetic and/or Surreal Numbers
Pythagoras and his followers believed that the Universe was made of numbers. Specifically, they thought that if you compared any magnitudes of the same kind, say the lengths of two objects, you would always get a whole number ra... | {} |
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
One of the first steps of data analysis is the descriptive analysis; this helps to understand how the data is distributed and provides important information for further steps. This set of exercises will include functions use... | {} |
### Home > GB8I > Chapter 9 Unit 10 > Lesson INT1: 9.1.3 > Problem9-38
9-38.
On graph paper, plot and connect the points to form quadrilateral $QUOP$ if its vertices are $Q(5, 4)$, $U(2, 4)$, $O(–1, 10)$, and $P(6, 10)$.
1. Calculate the perimeter of $QUOP$. Write your answer with appropriate precision.
When findin... | {} |
# When do real analytic functions form a coherent sheaf?
It is known that, in general, the sheaf of real analytic functions on a real analytic manifold is not coherent. However, there are some examples, where we have coherence: for example, if $X$ is a complex analytic manifold, then the sheaf of real analytic functio... | {} |
• 论文 •
### Abrupt Climate Changes of Holocene
WANG Shaowu1, 2, GE Quansheng3, WANG Fang3, WEN Xinyu1, HUANG Jianbin2
1. (1. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China; 2. Center for Earth System Science, Tsinghua University, Beijing 100084, China; 3. I... | {} |
# Four-loop renormalization of QCD with a reducible fermion representation of the gauge group: anomalous dimensions and renormalization constants
Chetyrkin, K G; Zoller, M F (2017). Four-loop renormalization of QCD with a reducible fermion representation of the gauge group: anomalous dimensions and renormalization con... | {} |
## Elementary Technical Mathematics
If we have proportion in the form of $\frac{a}{b}$= $\frac{c}{d}$ which is equivalent to a:b =c:d Given, proportion $\frac{1}{2}$ = $\frac{3}{6}$ a) Means of a proportion is b and c. So for the given proportion means are 2 and 3 b.) Extremes of the proportion are a and d. So extreme... | {} |
# Model/hyperparameter selection
Usefulness: 🔧
Novelty: 💡
Uncertainty: 🤪 🤪 🤪
Incompleteness: 🚧 🚧 🚧
Choosing which of an ensemble of models to use, or, which is the same things more or less, the number of predictors, or the regularisation. This is a kind of complement to statistical learning theory where you h... | {} |
Question: How to select the genes mapped to an enriched KEGG pathway (kegga)
0
2.8 years ago by
mat14940
mat14940 wrote:
Hello,
I used the kegga function to gather pathway enrichment for my dataset. I would like to obtain a data frame (or any possible format) containing which genes are "up" and "down" for a given ke... | {} |
# Is it possible to get the original number from DecimalForm?
Bug introduced in 5.2 or earlier and persisting through 12.0 [CASE:4315787]
Wrong behavior of NumberForm (DecimalForm outputs the same) is confirmed by Wolfram techical support [CASE:4315787].
I'm trying to implement an efficient TSV exporter based on the... | {} |
Vector Problem
Printable View
• August 28th 2008, 10:51 AM
Dubulus
Vector Problem
Given the vectors a=<8,6,8> and b=<1,2,-1>, express a as a sum of a vector parallel to b and a vector perpendicular to b.
Thanks!
• August 28th 2008, 10:58 AM
Plato
$a = \frac{{a \cdot b}}{{b \cdot b}}b + \left[ {a - \frac{{a \cdot b}}... | {} |
# scipy.special.gammainc#
scipy.special.gammainc(a, x, out=None) = <ufunc 'gammainc'>#
Regularized lower incomplete gamma function.
It is defined as
$P(a, x) = \frac{1}{\Gamma(a)} \int_0^x t^{a - 1}e^{-t} dt$
for $$a > 0$$ and $$x \geq 0$$. See [dlmf] for details.
Parameters:
aarray_like
Positive parameter
xarr... | {} |
Feynman rule involving derivative of a field.
1. Jul 21, 2008
arroy_0205
Can anybody help me by explaining how to write down the Feynman rule corresponding to a term like
$$ieA^{\mu}\phi^{\ast}\partial_{\mu}\phi$$
I am confused about the presence of the derivative term. Terms have usual meaning.
2. Jul 21, 2008
Co... | {} |
## DMOPC '20 Contest 7 P3 - Senpai and Art
View as PDF
Points: 20 (partial)
Time limit: 2.0s
Memory limit: 256M
Author:
Problem type
It's Senpai's turn to draw now! Senpai starts with an initially empty canvas, represented by an array of length all with layers of paint. In one brush stroke, he can add layer of pain... | {} |
# Domain (ring theory)
In mathematics, and more specifically in algebra, a domain is a ring such that ab = 0 implies that either a = 0 or b = 0.[1] That is, it is a ring which has no left or right zero divisors. (Sometimes such a ring is said to "have the zero-product property.") Some authors require the ring to be no... | {} |
# Multispecies coalescent process
Multispecies Coalescent Process is a stochastic process model that describes the genealogical relationships for a sample of DNA sequences taken from several species.[1][2] It represents the application of coalescent theory to the case of multiple species. The multispecies coalescent r... | {} |
# Getting Started
### Note
Accordions are currently supported for HTML5 and Zendesk outputs.
Accordions are sections of content that can be expanded or collapsed. They are useful when:
• You have long, complex procedures. You can break the procedure down into sub-sections, and make each sub-section an accordion. Th... | {} |
## Basic College Mathematics (10th Edition)
Use unit fractions to convert 125 lb to kilograms. $125lb\times\frac{0.45kg}{1lb}=56.25$ | {} |
Access to the full content is only available to members of institutions that have purchased access. If you belong to such an institution, please log in or find out more about how to order.
### Contents
• content locked
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• content locked
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# M... | {} |
The Riemann zeta function and differential operators
I've revisited an old post of mine--Dirac's Delta Functions and Riemann's Jump Function J(x) for the Primes--dealing with Riemann's "jump" or "staircase" function (aka, Π(x)) that has unit steps for each prime along the horizontal axis and smaller steps of size $$1/... | {} |
# Formulating a Mixed Integer Programming Problem
1. Nov 9, 2012
### I Like Pi
1. The problem statement, all variables and given/known data
Not sure if this type of math goes in this section, but I have a quick question regarding a MIP problem. It's simple to grasp, but I'm not sure whether or not I am formulating t... | {} |
Function Class¶
class rocketpy.Function.Function(source, inputs=['Scalar'], outputs=['Scalar'], interpolation=None, extrapolation=None)[source]
Class converts a python function or a data sequence into an object which can be handled more naturally, enabling easy interpolation, extrapolation, ploting and algebra.
Conv... | {} |
# Math Help - Help
1. ## Help
If a1,a2,...an are in A.P. where ai>0 then value of
1/(sq root a1+sq root a2) + 1/(sq root a2+sq root a3) +.......... 1/sq root an-1 + sq root an = ??
I did not knw how to write it in proper form but hope u understand my question
2. Originally Posted by cnpranav
If a1,a2,...an are in A... | {} |
×
# Orthocentre Problem
If $$x, y, z$$ are the distances of the vertices of the points $$A,B$$ and $$C$$ respectively in $$ΔABC$$ from the orthocentre, then simplify the expression:
$$\frac{a}{x}+\frac{b}{y}+\frac{c}{z}$$
Note by Krishna Jha
3 years, 8 months ago
Sort by:
We know that : $$x = 2RcosA$$ , $$y = 2Rc... | {} |
# For all matrices A exists unique matrix B with $B^2=A$ in a sufficient neighborhood.
Show existence of $$\epsilon > 0, \delta > 0$$ such that for all $$A\in U_\epsilon(Id_n)$$ exists unique $$B \in U_\delta(Id_n)$$ with $$B^2=A$$.
$$U_\epsilon(Id_n):=\{X \in M_{n\times n}| \Vert X-Id_n \Vert < \epsilon; \Vert \cdot... | {} |
# The direction of motion of a projectile becomes horizontal at maximum height. Why?
This is because the projectile is under the influence of gravity which acts vertically downwards. The projectile has two components of velocities. One is vertical component $(v\cos\theta)$ and other is horizontal component $(v\sin\the... | {} |
# Proof- Question about Rolle's Theorem
1. Nov 19, 2009
### fireb
1. The problem statement, all variables and given/known data
Consider a differentiable curve r: [a,b]-> R(3) such that r(a)= r(b). show that there is a value t belongs [a,b] such that r(t) is orthogonal to r(prime)(t).
2. Relevant equations
3. The ... | {} |
# Base
Bases are the cornerstone of your faction in Alpha Centauri. These manufacture your units, collect your energy for your economy and research, provide votes for supreme leader, and provide some defensive assistance. If playing with Do Or Die, taking all of a faction's basses results in game over for that faction... | {} |
# Getting into Linux Kernel Development 【Share】
Ref:
https://www.cyphar.com/blog/post/getting-into-linux-kernel-development
I don't know about you, but I've always found the idea of operating system kernels to be some mysterious and esoteric programming skill. Its importance cannot be overstated of course, but I've ... | {} |
# Example of unit testing R code with testthat
Here’s a little example of using Hadley Wickham’s testthat package for unit testing R code.
The function below computes the real roots of a quadratic. All that really matters for our purposes is that the function can return 0, 1, or 2 numbers and it could raise an error.... | {} |
# Solve the initial value problem $xyy' + xy' = 1$ and $y(1) = 0$
I can solve the differential equation, which is $$y + y^{2}/2 = \ln(x) + C$$.
But I cannot solve the IVP because I can't isolate for $$y$$ and find the value of $$C.$$
We have (just reproducing your work for completeness, and combining some of the com... | {} |
# \pagestyle does not work as expected
I'm using the fancyhdr package and I have defined headers & footers for the fancy page style using the fancypagestyle command. I have also defined a new page style, tocstyle, using the same command.
Defined in this order:
\pagestyle{fancy}{%
\def\footnotelayout{\color{darkgrey}... | {} |
# Low temperature quantum bounds on simple models
### Submission summary
As Contributors: Silvia Pappalardi Arxiv Link: https://arxiv.org/abs/2106.13269v5 (pdf) Date accepted: 2022-06-21 Date submitted: 2022-04-25 10:08 Submitted by: Pappalardi, Silvia Submitted to: SciPost Physics Academic field: Physics Specialtie... | {} |
Geometry:what is the opposite of a sphere?& what shape maximises surface area/volume?
01-31-2019, 06:07 PM (This post was last modified: 01-31-2019 06:15 PM by StephenG1CMZ.)
Post: #1
StephenG1CMZ Senior Member Posts: 870 Joined: May 2015
Geometry:what is the opposite of a sphere?& what shape maximises surface area/vo... | {} |
# zbMATH — the first resource for mathematics
Solutions to a three-point boundary value problem. (English) Zbl 1222.34022
Authors’ abstract: By using the fixed-point index theory and the Leggett-Williams fixed-point theorem, we study the existence of multiple solutions to the three-point boundary value problem
$u'''(t... | {} |
/ TensorFlow
A Guide to TensorFlow: Building a Neural Network (Part 7)
Series Introduction
This blog is a part of "A Guide To TensorFlow", where we will explore the TensorFlow API and use it to build multiple machine learning models for real-life examples. Uptil now we've learnt how to build simple machine learning ... | {} |
# the inner product of 2 vectors in complex vector space
Let us consider two vectors $u$ and $v$ are in the complex vector space. The inner product of these two vectors is defined by
$u\cdot v=(u_1^*\cdot v_1, u_2^*\cdot v_2,\cdots\cdots, u_n^*\cdot v_n)$
How can this definition be proved? How did we even get to thi... | {} |
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