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Introduction
Many stock assessment methods use linear regression e.g. for calibration when using CPUE as trends of relative abundance or as part of emprirical harvest control rules. Regression models, however, are vulnerable to abnormal points, which may cause bias, affect estimation accuracy and result in poor predic... | {} |
Mathematics
OpenStudy (anonymous):
OpenStudy (e.mccormick):
One thing about the multiplicative inverses is if you multiply them you get the identity.
OpenStudy (anonymous):
could you show me? I'm still a lil confused with this
OpenStudy (e.mccormick):
Well, do you know how to do matrix multiplication?
OpenStudy ... | {} |
## Boundedness of weak solutions to some linear elliptic equations with measure data.(English)Zbl 1212.35179
Summary: We prove boundedness of weak solutions $$u$$ to some linear elliptic equations in divergence form $-\operatorname {div}(a(x)Du(x))=\mu .$ On the right-hand side we have a Radon measure $$\mu$$ with a s... | {} |
# AN ANALYSIS OF THE FAR INFRARED SPECTRUM OF ACETONE
Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/12461
Files Size Format View
1991-RF-14.jpg 87.35Kb JPEG image
Title: AN ANALYSIS OF THE FAR INFRARED SPECTRUM OF ACETONE Creators: Smeyers, Y. G.; Senent, M. L.; Moule, D. C. Is... | {} |
# Calculate Gradients and Hessians Using Symbolic Math Toolbox™
This example shows how to obtain faster and more robust solutions to nonlinear optimization problems using `fmincon` along with Symbolic Math Toolbox functions. If you have a Symbolic Math Toolbox license, you can easily calculate analytic gradients and H... | {} |
A photon is a particle of electromagnetic radiation that has zero mass and carries a quantum of energy. In 1905, Albert Einstein (1879-1955) proposed that light be described as quanta of energy that behave as particles. The threshold frequency depends on the metal or material of the cathode. The photoelectric effect wa... | {} |
[PLACE-HOLDER POST, COPYRIGHT LILIAN WENG] How to train large and deep neural networks is challenging, as it demands a large amount of GPU memory and a long horizon of training time. This post reviews several popular training parallelism paradigms, as well as a variety of model architecture and memory saving designs to... | {} |
What is the best way Reinforcement learning, RNN or others to predict the best action we have to take to maximize sales?
I have a dataset composed of few features :
customerId, actionDay1, SalesDay1, actionDay20, SalesDay20, actionDay30, SalesDay30
action can be :
• call
• email
• face 2 face
• nothing
sales : amo... | {} |
?
Free Version
Easy
# How Much Flux?
APPH12-MDVG2R
A circular loop of wire with a radius of 0.100 m is in a magnetic field of 0.200 T.
What is the maximum magnetic flux through the loop?
A
0.00 Wb
B
1.26x${ 10 }^{ -1}$ T ${m}^{2}$
C
2.00x${ 10 }^{ -2 }$ T ${m}^{2}$
D
6.28x${ 10 }^{ -3}$ T ${m}^{2}$ | {} |
# Loss due to contraction vs loss due to expansion
#### ling233
I was told that the friction loss due to expansion is bigger than the friction loss due to contraction because of flow separation , is it true ? why ?
bump bump bump | {} |
# Is there any easy way to parallel gröbnerbasis computations in sage?
Hi, I have a problem I am currently working on where I wish to eliminate variables from a system of polynomials. I have managed to do it in several cases, but for large systems to check my hypothesis the memory usage becomes very large, and the com... | {} |
# Abstract:
Distributivity of fuzzy implications over different fuzzy logic connectives have a very important role to play in efficient inferencing in approximate reasoning, especially in fuzzy control systems (see \cite{Combs_Andrews_1998,Jayaram2008} and \cite{Baczynski_Jayaram_2008}). Recently in some consideration... | {} |
# How to calculate air resistance of penny dropped from Empire State Building?
If a penny is dropped from the Empire State Building, then its speed, without taking air resistance into consideration, is
$\sqrt{\left(32\frac{\textrm{ft}}{\textrm{s}^2}\right)(1454\textrm{ ft})}=216.3\frac{\textrm{ft}}{\textrm{s}}$, or $... | {} |
### Jonathan Borwein, CARMA, University of Newcastle, Australia
Visual Theorems in Mathematics
Long before current graphic, visualisation and geometric tools were available, John E. Littlewood (1885-1977) wrote in his delightful A mathematician's miscellany (Methuen 1953):
"A heavy warning used to be given [by lectur... | {} |
CoCalc Public Filesclean / Project / Project1 / Project V1 PR.ipynb
Author: Kendahl Ott
Views : 51
Compute Environment: Ubuntu 18.04 (Stable)
# Predicting the movement of air particles by the Lorenz Equation
#### Introduction
For centuries, being able to predict the weather is something that has been of great intere... | {} |
# Software Foundations Reading Note 2: Proof by Induction
## Overview
This module mainly introduces proof by induction in Coq. In addition to that, it talks about Coq's syntax for proofs within proofs, and about formal vs. informal proofs.
## Proof by Induction
Proof by induction is an important proof technique tha... | {} |
# hybridisation of no2 using formula
How to explain molecular geometry without the help of VSEPR, valence bond, or hybridization theories? You can also find hybridization states using a steric number, so let's go ahead and do that really quickly. Nitrogen dioxide is a chemical compound with the formula NO 2.It is one ... | {} |
## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
The maximum number of real zeros is $6$. The number of positive real zeros is either 2 or 0. The number of negative real zeros is either 2 or 0.
We should remember that the maximum number of zeros of a polynomial function ... | {} |
Infinite towers & solutions to Lambert W-function - Printable Version +- Tetration Forum (https://math.eretrandre.org/tetrationforum) +-- Forum: Tetration and Related Topics (https://math.eretrandre.org/tetrationforum/forumdisplay.php?fid=1) +--- Forum: Mathematical and General Discussion (https://math.eretrandre.org/t... | {} |
Dynamical Systems Seminar: Hasina Akter (UNT): Real Analyticity of Hausdorff Dimension of Julia Sets of Parabolic Polynomials $f_{\lambda}(z)=z(1-z-\lambda z^2 )$, GAB 461 | Department of Mathematics
# Dynamical Systems Seminar: Hasina Akter (UNT): Real Analyticity of Hausdorff Dimension of Julia Sets of Parabolic Pol... | {} |
• For Contributors +
• Journal Search +
Journal Search Engine
ISSN : 1229-3431(Print)
ISSN : 2287-3341(Online)
Journal of the Korean Society of Marine Environment and Safety Vol.27 No.2 pp.211-218
DOI : https://doi.org/10.7837/kosomes.2021.27.2.211
# Suppression of Coupled Pitch-Roll Motions using Quasi-Sliding Mode C... | {} |
# Example: Function visualization
Published 2014-03-15 | Author: Christian Feuersänger
We want to visualize two functions. The first function is given by means of a data table. The second function is given by means of a math expression. We would like to place the two results side-by-side, and we would like to have “p... | {} |
GMAT Question of the Day - Daily to your Mailbox; hard ones only
It is currently 12 Dec 2018, 18:00
### GMAT Club Daily Prep
#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customize... | {} |
# Tag Info
8
It depends what you're doing, and indeed most of the quantum optics literature dismisses the term as it does not contribute to the dynamics. However, it is important that beginning students form an intuition for how and where zero-point energies come in, and why they are necessary. Take a look at the eig... | {} |
## Some $$\Omega$$-theorems for the Riemann zeta-function.(English)Zbl 0606.10031
Several new Omega results involving the functions $S(T)=(1/\pi) \arg \zeta (1/2+iT),\quad S_ 1(T)=\int^{T}_{0}S(t) dt$ are proved. As is well-known [see Chapter IX of E. C. Titchmarsh, The theory of the Riemann zeta-function (1951; Zbl 0... | {} |
# Earned Value Management PMP Exam Questions
Welcome to your Earned Value Management Quiz!
email
Name
1.
A project is estimated to cost $50,000 with a timeline of 50 days. After 25 days, the project manager finds that 80% of the project is complete and Actual costs are$50,000. What is the Cost Performance Index (CPI)... | {} |
Transport planners and researchers very frequently want to assess the quality of the GTFS feeds they have produced and consumed. Are the feeds structured according to the best practices agreed by members of the larger GTFS community? Are tables and fields adequately formatted? Is the information described in the feed r... | {} |
Geometry
.
INTRODUCTION
Lstening to a mathdoc, I got knowledge about geometry that connected the geometry of Euclide to that of Gauss and Riemann. They said:
“The properties of space were first described by the mathematician euclid over 2 000 years ago in his legendary text the elements in it he laid down a set o... | {} |
## Tuesday, October 1, 2019
### Dealing with aggregates: I don't like tedious work
I used to study nanoparticles (NPs) self-assembly in polymer matrices before 2017 by coarse-grained simulation method. Analyzing morphologies of self-assemblies is a tedious work: one needs to repeatedly watch frames from simulation tr... | {} |
## Files in this item
FilesDescriptionFormat
application/pdf
4240.pdf (19kB)
AbstractPDF
## Description
Title: TEMPERATURE DEPENDENCE OF THE INTENSITY OF THE VIBRATION-ROTATIONAL IR BAND ν2 OF THE H2O TRAPPED IN AN XENON MATRIX Author(s): Semiankou, Aliaksandr Contributor(s): Shastin, Alex ; Pitsevich, George ; P... | {} |
# How do you find the constant of variation K for the inverse variation and write the inverse variation equation given x= 1/2 y= 14?
Nov 20, 2017
$y = \frac{7}{x}$
#### Explanation:
$\text{the initial statement is } y \propto \frac{1}{x}$
$\text{to convert to an equation multiply by k the constant}$
$\text{of vari... | {} |
Appalachian set theory
# Simon Thomas : "Countable Borel equivalence relations"
## Description
This workshop will present an introduction to recent work on countable Borel equivalence relations, a very active area of descriptive set theory which interacts nontrivially with such diverse areas of mathematics as model ... | {} |
# Proof of the Intermediate Value Theorem
Theorem: Let $f$ be continuous on $[a,\,b]$ and assume $f(a)<f(b)$. Then for every $k$ such that $f(a)<k<f(b)$, there exists a $c\in[a,\,b]$ such that $f(c)=k$.
proof: $f$ continuous at $a\implies$ for $\varepsilon=k-f(a)>0$, $\exists\delta>0$ s.t. $$|f(x)-f(a)|<\varepsilon=k... | {} |
# Why does Biot-Savart's Law seem to fail when the current element is directed perpendicular to the position vector from the point concerned?
To see why I think the law fails, please check the following situation.
The law states that $d\mathbf B=k\dfrac{id\mathbf l \times \mathbf r}{r^3}$.
Consider a current element... | {} |
## Notes to Anaphora
1. For example, the beginning of the entry for “anaphora” in the Supplement to the Macmillan Encyclopedia of Philosophy (London: Macmillan, 1996) reads
The study of anaphora (from Greek, “carry back”) is the study of the ways in which occurrences of certain expressions, particularly pronouns, dep... | {} |
>**Puzzle 92.** What's a \$$\mathbf{Cost}\$$-functor?
**Definition.** Let \$$\mathcal{X}\$$ and \$$\mathcal{Y}\$$ be \$$\mathbf{Cost}\$$-categories. A \$$\mathbf{Cost}\$$-functor from \$$\mathcal{X}\$$ to \$$\mathcal{Y}\$$, denoted \$$F\colon\mathcal{X}\to\mathcal{Y}\$$, is a function
$F\colon\mathrm{Ob}(\mathcal{X})... | {} |
# Viewpoint: Double Magic Coincidence in an Optomechanical Laser Cavity
, FOTON Laboratory, Université Européenne de Bretagne, CNRS-INSA-UR1, F-35708 Rennes, France
Published January 14, 2013 | Physics 6, 6 (2013) | DOI: 10.1103/Physics.6.6
#### Strong Optical-Mechanical Coupling in a Vertical GaAs/AlAs Microcavi... | {} |
As shown in the figure below, two concentric conducting spherical shells, centered at $r = 0$ and having radii $r = c$ and $r = d$ are maintained at potentials such that the potential $\text{V(r)}$ at $r = c$ is $V_{1}$ and $\text{V(r)}$ at $r = d$ is $V_{2}$. Assume that $\text{V(r)}$ depends only on $r$, where $r$ is... | {} |
# Proving pointwise convergence of series of functions
Show that $1/(1+x)+2x/(1+x^{2})+\cdots+mx^{m-1}/(1+x^m)+\cdots=1/(1-x)$ where $m= 2^{n−1}$ and $−1 < x < 1$, in the sense of pointwise convergence.
I have tried to bound this by Wierestrass M-Test but haven't found one, also this test doesn't tell you about the l... | {} |
## 3.1 General
### 3.1.1 Indirect
• If we assume suspect A did not commit the crime, his behavior in the following days is very unusual, so let’s act as if A is the perpetrator.
• We have only two suspects. The likelihood that suspect A committed the crime is small, so we turn attention to suspect B even though we do... | {} |
+0
# integrating w substitution
+1
41
2
20 (x/sqrt(1+2x^2))dx
I got 1 as my final answer....but I'm not sure if thats correct. Even if it is right, would someone be able to go through this problem step by step?
also if anyone could help me with this following problem:
3π^2 π/2 cosx/sin^2(x)dx
thank you!!!
Mar 2... | {} |
Salta al contenuto principale
GIOVANNI PERRONE
Network Positions and the Probability of Being Acquired: An Empirical Analysis in the Biopharmaceutical Industry
• Autori: Mazzola, E.; Perrone, G.; Kamuriwo, D.
• Anno di pubblicazione: 2016
• Tipologia: Articolo in rivista (Articolo in rivista)
Abstract
This paper e... | {} |
# List of Plain TeX macros [duplicate]
Where can I get a list of all Plain TeX macros. In the TeXbook, it is said that Plain TeX adds about 600 macros (to the ~300 TeX primitives). Where are they listed (with their documentation)? | {} |
# First page number is not appearing
The first page number is not appearing however the subsequent page numbers are. It is just the first page number that doesn't appear and I am not sure why.
\documentclass[twocolumn,prb,amsmath,amssymb,amsfonts]{revtex4-2}
\usepackage{graphicx}
\usepackage{gensymb}
\begin{document... | {} |
Solving Options¶
Locking routes¶
It is possible to constrain the problem with partial routes if preassignments are known. There are two possibilites : either a complete route is known, and it should not be optimized, either only a partial route is known, and it may be extended. Such routes are given to the solver wit... | {} |
## How much O2 will be left?
For those who haven’t noticed. There is currently a discussion about melting permafrost on Azimuth. If frozen soil is melted then usually greenhouse gases are going to be emitted. So in this context (comment on Azimuth) I was raising again the question to which extend the melting of permaf... | {} |
Under the auspices of the Computational Complexity Foundation (CCF)
REPORTS > KEYWORD > ISOLATION LEMMA:
Reports tagged with Isolation Lemma:
TR06-062 | 24th April 2006
Subhas Kumar Ghosh
#### Unique k-SAT is as Hard as k-SAT
In this work we show that Unique k-SAT is as Hard as k-SAT for every $k \in {\mathds N}$. T... | {} |
# 4-sphere
## Is there an algorithm to determine if a triangulated 4-manifold is combinatorially equivalent to the 4-sphere? ★★★
Author(s): Novikov
\begin{problem} Is there an algorithm which takes as input a triangulated 4-manifold, and determines whether or not this manifold is combinatorially equivalent to the 4-... | {} |
# Section 1.6 - More Equations: Rational equations that reduce to linear or quadratic, Odd roots, Radicals, Rational exponents, Quadratic in form
Section Objectives
1. Determine the values of the variable that are restricted from a rational expression.
2. Solve rational equations that reduce to linear or quadratic.
3... | {} |
GMAT Question of the Day - Daily to your Mailbox; hard ones only
It is currently 17 Oct 2019, 16:50
### GMAT Club Daily Prep
#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customize... | {} |
# Properties
Label 392.3.g.m Level 392 Weight 3 Character orbit 392.g Analytic conductor 10.681 Analytic rank 0 Dimension 8 CM no Inner twists 2
# Related objects
## Newspace parameters
Level: $$N$$ $$=$$ $$392 = 2^{3} \cdot 7^{2}$$ Weight: $$k$$ $$=$$ $$3$$ Character orbit: $$[\chi]$$ $$=$$ 392.g (of order $$2$$... | {} |
Definitions
# Coefficient
[koh-uh-fish-uhnt]
In mathematics, a coefficient is a constant multiplicative factor of a certain object. For example, in the expression 9x2, the coefficient of x2 is 9.
The object can be such things as a variable, a vector, a function, etc. In some cases, the objects and the coefficients ... | {} |
# Symmetric structures in L_p spaces
Jeudi, 20. octobre 2022 - 13:30 - 14:30
Orateur:
Ismael Cano
Résumé:
In this talk, we will review some classical results on the
classification of symmetric structures in Lebesgue spaces. This will
lead to the introduction of some embedding problems in the theory of
$L_p$ spaces,... | {} |
# 101. A Maximum entropy approach to the identification of productive technology spillovers
ESTEBAN FERNÁNDEZ VÁZQUEZ – BART LOS. 2007. A MAXIMUM ENTROPY APPROACH TO THE IDENTIFICATION OF PRODUCTIVE TECHNOLOGY SPILLOVERS. Pellervo Economic Research Institute Working Paper No. 101. p. 25. Pellervon taloudellisen tutkim... | {} |
# newinstall.sh: no longer install the lsst package
XMLWordPrintable
#### Details
• Type: Improvement
• Status: Invalid
• Resolution: Done
• Fix Version/s: None
• Component/s:
• Labels:
None
• Team:
SQuaRE
#### Description
Why does newinstall.sh need to install the lsst package?
From a discussion in the dm-square... | {} |
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
I’m starting to get familiar with ggplot2, and I really like it. I just found a very quick way to use several dataframes within the same plot, provided that the dataframes share columns names.
One obvious application is the... | {} |
# Regular octahedron: Surface area and volume
The octahedron is a polyhedron of eight faces, regular when all the faces are equilateral triangles.
The following expressions are used to find the area and volume of the octahedron $$A=2 \cdot \sqrt{3} \cdot a^2 \\ V=\dfrac{\sqrt{2}}{3} a^3$$
a) Define the dimensions of... | {} |
# Finding two vertices of a rectangle given two vertices and angle?
I have a rectangle where I know the coordinates of the opposite diagonal corners. I also know the angle that the rectangle is rotated. I would like to solve to find the coordinates of the other two vertices or opposite corners.
To help illustrate I a... | {} |
# Revision history [back]
### Different values in /cmd_vel/angular/z and /odom/.../angular/z
Hello. I am new in the use of ROS-Gazebo simulation. I'm using simulation with model p3dx in ROS Indigo and Gazebo 2.x in Ubuntu 14.04 64bits. I'm struggling with the difference between: a) the cmd_vel.angular.z values (value... | {} |
# is there a numerical basis based on $\pi$? [closed]
I have a question, is it possible to use $\pi$ as a single unit like we get $3,14$ as $1$, and use it to develope a new numerical basis based on $\pi$ in which number $2$ will be $\pi \cdot 2$ , and if so does it exist? in this new basis can $\pi$ has an exact amou... | {} |
## Doctoral Dissertations
#### Title
Biological treatment of waste semi-synthetic metalworking fluid using a fluidized-bed bioreactor
January 1997
#### Keywords
Engineering, Chemical|Engineering, Environmental
Ph.D.
#### Abstract
A fluidized bed bioreactor (FBB) was studied to treat wastewater originating from ... | {} |
# Mean calculator
## Introduction to Mean Median Mode
Mean median mode helps to simplify large sets of numbers by calculating the center values. In general mathematics and statistics, range and standard deviation is used to examine the variability of data. For this standard deviation calculator using mean can be very... | {} |
# Riemann manifold
Let's suppose we have $N$ a compact Riemann manifold and a smooth function f on N. Prove that $\nabla f= 0$ at 2 or more points.
I am not very sure that this question is correct because I don't see how the fact that N is Riemannian fits.
-
Awesome related fact (due to Reeb): If you can cook up suc... | {} |
# Non-symmetric $A^T=A$
Wikipedia says that symmetric matrices are square ones, which have the property $A^T=A$. This assumes that one can have non-square $A^T=A$ and, because it does not satisfy the first property of symmetry, it is not symmetric. So, there can be non-symmetric $A^T=A$ matrices and the definition is ... | {} |
# zbMATH — the first resource for mathematics
A note on the simplicity of skew polynomial rings of derivation type. (English) Zbl 1117.16016
Summary: In earlier papers we have obtained necessary and sufficient conditions for the simplicity of an iterated skew polynomial ring defined over a ring $$R$$ with respect to a... | {} |
# Large sieve
2010 Mathematics Subject Classification: Primary: 11N35 [MSN][ZBL]
A method developed by Yu.B. Linnik in 1941 which permits one to sift out in sequences of increasing numbers the residues to be discarded. Its essence may be explained as follows. Consider a given sequence of positive integers $n_1,\ldots... | {} |
GMAT Question of the Day - Daily to your Mailbox; hard ones only
It is currently 18 Nov 2018, 00:14
### GMAT Club Daily Prep
#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customize... | {} |
You can learn more about from the following articles –, Copyright © 2021. It expresses the profit in terms of dollars as well as the percentage of the Returns on Investment (ROI). It allows us to compare different types of investments over the same time frame, making it easy to see which investments are most profitable... | {} |
# If $K$ is Hermitian and positive definite, then $K(z,w) = \sum \psi_n(z) \overline{\psi}_n(z)$ for $\psi_n$ analytic in some region of the plane.
While reading Zeros of Gaussian Analytic Functions and Determinantal Point Processes by Hough et al., I came across the following statement:
Since $K$ is Hermitian and po... | {} |
# 19.2 Electric potential in a uniform electric field (Page 3/5)
Page 3 / 5
## Section summary
• The voltage between points A and B is
$\begin{array}{c}\left(\begin{array}{c}{V}_{\text{AB}}=\mathrm{Ed}\\ E=\frac{{V}_{\text{AB}}}{d}\end{array}}\text{(uniform}\phantom{\rule{0.25em}{0ex}}E\phantom{\rule{0.25em}{0ex}}... | {} |
# Equivalence of norms between two Banach spaces
I just learnt open mapping theorem. And I met a statement online asserting that
If $X$,$Y$ are Banach space, and $T:X\to Y$ be a continuous bijection, then norms for $X,Y$ are equivalent.
Can we define equivalence of norms between two different spaces? And since the m... | {} |
J Radiat Prot > Volume 35(2);2010 > Article
$^{23}Na$(p, $gamma$)$^{24}Mg$ 및 $^{27}Al$(p, $gamma$)$^{28}Si$반응을 이용한 HPGe 검출기의 응답함수 박상태; Response Function of HPGe Detector using $^{23}Na$(p, $gamma$)$^{24}Mg$ and $^{27}Al$(p, $gamma$)$^{28}Si$ Reaction Park, Sang-Tae; ABSTRACT In the present work, peak relative efficien... | {} |
# Internal Energy Changes in Adiabatic Reactor
If we consider adiabatic reactor (one which doesn't exchange energy and matter with surroundings) with some reaction in liquid phase, energy balance for such reactor is written as heat of reaction being equal to time derivative of enthalpy at any point in time. Since reac... | {} |
# Giving raises
Alignments to Content Standards: N-Q.A.2 N-Q.A
A small company wants to give raises to their 5 employees. They have $10,000 available to distribute. Imagine you are in charge of deciding how the raises should be determined. 1. What are some variables you should consider? 2. Describe mathematically dif... | {} |
Why is $\cos(x)-i\sin(x) = \cos(-x)+i\sin(-x)=\operatorname*{cis}(-x)$?
I do not understand why: $$\cos(x)-i\sin(x) = \cos(-x)+i\sin(-x)$$
The last step i understand. (It is one of the solutions of a quadratic equation if it matters)
• Because $\cos x$ is an even function, i.e., $f(x)=f(-x)$ is the definition for su... | {} |
Free Version
Difficult
# Coefficient of Variation - Mean Score on the SAT
STATS-0LAJEV
The mean score on the SAT is $1509$ with a standard deviation of $312$. The mean ACT score is $21$ with a standard deviation of $4.7$.
Relative to its mean, which test has more variability in its scores?
A
The SAT, with a coeff... | {} |
# Thread: use cramer's rule to determine what values of (variable) yield.....
1. ## use cramer's rule to determine what values of (variable) yield.....
Ok well.......
the system:
x- y+ 3z= -8
2x+ 3y- z= 5
3x+ 2y+ 2kz= -3k
So using cramer's rule i first had to find the determinants.
They are as follows:
D=10k-10
... | {} |
Some help needed
1. Sep 7, 2005
2. Sep 8, 2005
Neitrino
Sorry but,
Could at least tell me why my question is not getting any replies???
Im very wondered.... its too nonsensical ? If so what do I say wrong?
3. Sep 8, 2005
snooper007
I think the expresion $$<0|\phi(x)\phi(y)|0>$$
survives $$<0|a_p a_q^\dag|0>$$ m... | {} |
Ask questions and get helpful responses.
# Statistics
In the Dominican Republic in August, the distribution of daily high temperature is approximately normal with mean 86 degrees Fahrenheit (°F). Approximately 95% of all daily high temperatures are between 83°F and 89°F. What is the standard deviation of the distribu... | {} |
### EXPORTNDF
Create NDFs holding final model values
#### Description:
Specify a value of 1 or 0 to export all or none of the model components after the final iteration. You can also specify a comma-separated list of component names, enclosed in parentheses, to be exported. Note that you can specify additional compo... | {} |
Article
# Quantum oscillations in electron doped high temperature superconductors
• ##### Sudip Chakravarty
Physical review. B, Condensed matter (Impact Factor: 3.77). 12/2009; DOI: 10.1103/PhysRevB.82.094515
Source: arXiv
ABSTRACT Quantum oscillations in hole doped high temperature superconductors are difficult to ... | {} |
dm_validate() checks the internal consistency of a dm object.
## Usage
dm_validate(x)
x
An object.
## Value
Returns the dm, invisibly, after finishing all checks.
## Details
In theory, with the exception of new_dm(), all dm objects created or modified by functions in this package should be valid, and this funct... | {} |
# A deep thought puzzle
Thursday 9th December 2021
One number is removed from the set of consecutive integers from $$1$$ to $$n$$. The average of the remaining numbers is $$40$$. Which integer was removed? (A hint for students can be found at the end of this article!)
What do you call problems that can be simply exp... | {} |
# I Parametrization manifold of SL(2,R)
#### Wledig
I'm reading a book on Lie groups and one of the first examples is on SL(2,R). It says that every element of it can be written as the product of a symmetric matrix and a rotation matrix, which I can see, but It also makes the assertion that the symmetric matrix can b... | {} |
RUS ENG JOURNALS PEOPLE ORGANISATIONS CONFERENCES SEMINARS VIDEO LIBRARY PACKAGE AMSBIB
General information Latest issue Archive Search papers Search references RSS Latest issue Current issues Archive issues What is RSS
J. Comp. Eng. Math.: Year: Volume: Issue: Page: Find
Engineering Mathematics Simul... | {} |
In each of the following systems of equations determine whether the system has a unique solution,
Question:
In each of the following systems of equations determine whether the system has a unique solution, no solution or infinitely many solutions. In case there is a unique solution, find it
$2 x+y=5$
$4 x+2 y=10$
... | {} |
1. ## Continuous functions subring?
Let T be the ring of all continuous functions from R to R and let S={f belonging to T such that f(2)=0} Is S a subring of T? Give a proof.
I believe it is.
Closed under addition by letting f belong to T so that f(2)=0 and g belong to T so that g(2)=0. By prop. of cont. functions (... | {} |
SumTools[Hypergeometric] - Maple Programming Help
Home : Support : Online Help : Mathematics : Discrete Mathematics : Summation and Difference Equations : SumTools : SumTools/Hypergeometric/AreSimilar
SumTools[Hypergeometric]
AreSimilar
test if two hypergeometric terms are similar
Calling Sequence AreSimilar(S, ... | {} |
# Shock polar
The term shock polar is generally used with the graphical representation of the Rankine-Hugoniot equations in either the hodograph plane or the pressure ratio-flow deflection angle plane. The polar itself is the locus of all possible states after an oblique shock.
## Shock Polar in the ${\displaystyle (... | {} |
# July 15, 2019 The Data Science Life Cycle
In my initial post for the data science blog series on Topcoder, I gave a general introduction to data science, data analytics, and Python. The first article contains links to all of the resources referenced in each subsequent article. You are encouraged to follow the links ... | {} |
# Difference between minimizing and maximizing functions
Could someone please explain the difference between minimizing and maximizing functions or give me some links to explain the difference in very very very simple terms?
I have searched online and I found the following link:
Maximizing and Minimizing a function
... | {} |
# Runaway argument? with \newcommand[2]
I have a date (in the format YYYY.MM.DD) and a time (format HH:MM).
From these, I want to compute a kind of TimeStamp/Total of minutes.
\documentclass{article}
\makeatletter
% Timestamp
\newcommand{\timeStamp}[2]{%{#1-Date (YYYY.MM.DD)}{#2-Time (HH:MM)}
\expandafter\timeStam... | {} |
# The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 5...
## Question:
The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 5 cm, what are the dimensions of the rectangle in centimeters?
## Dimensions of a Rectangle:
Lengths and width... | {} |
# Thread: closure containing smallest closed set
1. ## closure containing smallest closed set
Prove: If $S \subset \bold{R}$, then $\bar{S}$ is the smallest closed set containing $S$.
So $\bar{S} = S \cup S'$. We want to show that if $T$ is any closed set and $S \subset T$, then $\bar{S} \subset T$.
So do proof by ... | {} |
# How do you simplify 5(3+12) + 42(23-4) using PEMDAS?
Jul 27, 2016
See explanation
#### Explanation:
We must use the PEMDAS method. Let's solve for the parentheses first:
$3 + 12 = 15$
$23 - 4 = 19$
We now have $5 \left(15\right) + 42 \left(19\right)$
Next is multiplication:
$5 \cdot 15 = 75$
$42 \cdot 19 = 7... | {} |
Planck Length
1. Apr 5, 2006
Harmony
Is it appropriate, if I defined Planck Length as the smallest distance possible for a matter to travel?
2. Apr 6, 2006
Meir Achuz
No. The PL is a combination of units, but not an absolute minimum, except in some highly speculatiove theories.
3. Apr 6, 2006
Harmony
Thanks. I... | {} |
# Csc
## Description
The csc(x) function returns value of cosecant for each value of the given x. This and other trigonometric functions can take values in radians, degrees, and gradian. The units are determined by the system.math.angularunits object property (which can also be set in the Options dialog box).
## Syn... | {} |
# Liouville-type theorems and existence of solutions for quasilinear elliptic equations with nonlinear gradient terms
@article{Chang2022LiouvilletypeTA,
title={Liouville-type theorems and existence of solutions for quasilinear elliptic equations with nonlinear gradient terms},
author={Caihong Chang and Bei Hu and Zhen... | {} |
Home > Standard Error > Standard Error Vs Standard Deviation
# Standard Error Vs Standard Deviation
If those answers do not fully address is key to understanding the standard error. 31, 32, 33, 34, 38, 40, 40, 48, 53, 54, and 55. The researchers report that candidate A is expected to receive 52%of the SD and the samp... | {} |
# What are some useful robust and scalable approaches towards anomaly detection of a time series data?
What are some useful robust and scalable approaches/methods towards anomaly detection of a time series data? I am mainly looking for some practical approaches carried out using Python, R, Java, etc. Albeit, I am also... | {} |
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