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9,900 | ## Gaussian Moments
### Gaussian Mean
The mean of a distribution is defined as its first-order moment:
(D.42)
To show that the mean of the Gaussian distribution is , we may write, letting ,
since .
### Gaussian Variance
The variance of a distribution is defined as its second central moment:
(D.43)
where is t... | 585 |
9,901 | # Why can't my implementation of the Actor-Critic algorithm achieve good results in the 2048 game?
I implemented the Actor-Critic with n-step TD prediction to learn to play the 2048 game
For the environment, I don't use this 2048 implementation. I use a simple one without any graphical interface, just pure matrices. ... | 327 |
9,902 | # In the Following Data, One of the Values of Y is Missing. Arithmetic Means of X and Y Series Are 6 and 8 (A) Estimate the Missing Observation. (B) Calculate Correlation Coefficient. - Mathematics and Statistics
Sum
In the following data, one of the values of Y is missing. Arithmetic means of X and Y series are 6 an... | 571 |
9,903 | # Freeze-in Production of Sterile Neutrino Dark Matter in U(1)$_{\rm B-L}$ Model
27 Sep 2016 Biswas Anirban Gupta Aritra
With the advent of new and more sensitive direct detection experiments, scope for a thermal WIMP explanation of dark matter (DM) has become extremely constricted. The non-observation of thermal WIM... | 171 |
9,904 | Certain decompositions of matrices over abelian rings.(English)Zbl 1458.16044
Summary: A ring $$R$$ is (weakly) nil clean provided that every element in $$R$$ is the sum of a (weak) idempotent and a nilpotent. We characterize nil and weakly nil matrix rings over abelian rings. Let $$R$$ be abelian, and let $$n\in\math... | 301 |
9,905 | # newbie differentation
#### lukebushnell
hi im a newbie to mathes and have been doing calculus recently ive. Been given two formulas and need to differentiate themthem and solve the equation, ive had a good attempt at them. i would just like to confirm if they are corret.
#### Ackbeet
MHF Hall of Honor
Your first ... | 260 |
9,906 | # Compilation fails with "! Missing \endcsname inserted."
Hi I've got a strange problem. I've defined a new command to print Linux commands line in the document:
\documentclass[12pt,a4paper]{article}
\usepackage{listings}
\newcommand{\shellcmd}[1]
{
\begin{lstlisting}
{#1}
\end{lstlisting}
}
\begin{document}
\shellc... | 564 |
9,907 | This site is supported by donations to The OEIS Foundation.
# Legendre symbol
The Legendre symbol ${\displaystyle \scriptstyle \left({\frac {a}{p}}\right)\,}$, introduced by Adrien-Marie Legendre in 1798, is a multiplicative arithmetic function that gives 0 if ${\displaystyle a}$ is divisible by the odd prime ${\disp... | 316 |
9,908 | Enter the total cost of the energy and the total amount of BTUs into the calculator to determine the cost per BTU.
## Cost Per BTU Formula
The following equation is used to calculate the Cost Per BTU.
CBTU = TC / E
• Where CBTU is the cost per BTU ($/btu) • TC is the total cost ($)
• E is the total amount of energy ... | 296 |
9,909 | # Sets of students, unions, complements, intersections
There are 93 students in the class; 42 like Math, while 41 like English. If 30 students don't like either subject, how many students like both?
A.10
B.20
C.41
D. The answer cannot be determined from the data given.
• use venn diagram – NewGuy Mar 18 '18 at 19... | 326 |
9,910 | # Thread: Cross and Dot Products
1. ## Cross and Dot Products
Find the cross product axb and verify it is orthogonal to both a and b
a = <e^2t, 1, e^-t>
b = <e^t, 2, e^-t>
I calculated the cross product to be <-e^-t, e^t - 1, 2e^2t - e^t> and tried dotting it with a and b. Problem is, I don't get 0 in either case. ... | 594 |
9,911 | # Enterprise
The value of annual production enterprise is 7.1 million USD. The average annual growth rate is 1.5%.
What will be value of production at the end of the fifth year?
x = 7.649 mil
### Step-by-step explanation:
Did you find an error or inaccuracy? Feel free to write us. Thank you!
Tips to related onli... | 978 |
9,912 | Main Article
Discussion
Related Articles [?]
Bibliography [?]
Citable Version [?]
An advanced level version of Non-Borel set.
Usually, it is rather easy to prove that a given set is Borel (see below). It is much harder to prove that the set A is non-Borel; see Non-Borel_set/Advanced if you are acquainted with desc... | 685 |
9,913 | Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/40365
DC FieldValueLanguage
dc.contributor.authorLongstaff, E. S.-
dc.contributor.authorCasewell, Sarah L.-
dc.contributor.authorWynn, G. A.-
dc.contributor.authorMaxted, P. F. L.-
dc.contributor.authorHelling, C.-
dc.date.accessioned20... | 807 |
9,914 | MathSciNet bibliographic data MR2983134 34C37 (37J45 70H05 70K44) Janczewska, Joanna; Maksymiuk, Jakub Homoclinic orbits for a class of singular second order Hamiltonian systems in \${\Bbb R}\sp 3\$${\Bbb R}\sp 3$. Cent. Eur. J. Math. 10 (2012), no. 6, 1920–1927. Article
For users without a MathSciNet license , Relay ... | 146 |
9,915 | 1. ## Primes p 123456789
Hi
Prove that there exist infinitely primes p such that the decimal representation contain the digits 123456789.
(Excuse-me my bad English, I don't speak that language)
2. I suppose you're expected to use Dirichlet's theorem on arithmetic progressions? Take a look at the following sequence:... | 324 |
9,916 | American Institute of Mathematical Sciences
April 2008, 2(2): 249-286. doi: 10.3934/jmd.2008.2.249
Spectral invariants in Lagrangian Floer theory
1 Department of Mathematics and Statistics, Université de Montréal, CP 6128 Succ. Centre Ville, Montréal, QC H3C 3J7, Canada
Received June 2007 Revised September 2007... | 593 |
9,917 | SICP - Solution: Exercise 1.26
# SICP - Solution: Exercise 1.26
## Exercise 1.26 #
Louis Reasoner is having great difficulty doing Exercise 1.24. His fast-prime? test seems to run more slowly than his prime? test. Louis calls his friend Eva Lu Ator over to help. When they examine Louis’s code, they find that he has ... | 463 |
9,918 | Variables in Types in type theory
I'm slowly grasping this, though the different formulations of type theory make it difficult.
In http://imps.mcmaster.ca/doc/seven-virtues.pdf types can only be formed from *, i, and a->b when a and b are Types.
In http://www.youtube.com/watch?v=IWuWpLTiM3g (9:00) types can be const... | 437 |
9,919 | # A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% of bromine. The molecular weight of the compound is 187.9. What is the molecular formula of the compound? (Atomic weight: H = 1.008, C = 12.0, Br = 79.9)
Sep 11, 2017
$\text{Molecular formula}$ $\equiv$ ${C}_{2} {H}_{4} B {r}_{2}$
#### Explanat... | 541 |
9,920 | # Interpolation of 4D data on a triangular grid
I need to interpolate a function defined on a triangular surface (grid). The grid is defined as
l=50;
Ω =
Flatten[
Table[
{(i1 - 9/10)/(2*l),
(i2 - 9/10)/(2*l),
1 - (i1 - 9/10)/(2*l) - (i2 - 9/10)/(2*l)},
{i1, 1, 2*l}, {i2, 1, 2*l - i1 + 1}],
0];
The grid thus consist... | 778 |
9,921 | # What is this oxidation number of CH_3OH and CH_2O?
Given that oxidation number is an empirical concept; the oxidation number of $C$ in methanol is $- I I$; in formaldehyde it is $0$.
On the Pauling scale, we can quote the electronegativities of $C , H , \mathmr{and} O$ as $2.55 , 2.20 , 3.44$. The means that the oxi... | 212 |
9,922 | # Given $G = (V,E)$, a planar, connected graph with cycles, Prove: $|E| \leq \frac{s}{s-2}(|V|-2)$. $s$ is the length of smallest cycle
Given $G = (V,E)$, a planar, connected graph with cycles, where the smallest simple cycle is of length $s$. Prove: $|E| \leq \frac{s}{s-2}(|V|-2)$.
The first thing I thought about wa... | 476 |
9,923 | # Hokkaido Mathematical Journal
### No.1
YOSHIKAWA Atsushi,
Construction of a parametrix for the Cauchy problem of some weakly hyperbolic equation II
Hokkaido Mathematical Journal, 7 (1978) pp.1-26
E. Harald,
The $A(p,q)$ algebras and singular measures with Fourier transforms in $L(2,q),q>2$
Hokkaido Mathematical Jou... | 559 |
9,924 | Economics, Short Run Perfect Competition
assume you own a computer shop and that you sell 1200 computers a year at this store. The selling price of the computer is $900 in a perfectly competitive market. Assume your ATC is$1000 and that your AVC is $750 while your AFC is$250. Should you continue this business in the s... | 345 |
9,925 | +0
+1
58
3
+230
The diagonals of a regular hexagon have two possible lengths. What is the ratio of the shorter length to the longer length? Express your answer as a common fraction in simplest radical form.
Sep 5, 2020
#1
+183
+3
The diagonals of a regular hexagon have two possible lengths. What is the ratio of th... | 391 |
9,926 | ## Introductory Algebra for College Students (7th Edition)
$x^4-4x^2y^2+4y^4$
Using $(a\pm b)^2=a^2\pm2ab+b^2$ or the square of a binomial, the square of the given expression, $(x^2-2y^2)^2 ,$ is \begin{array}{l}\require{cancel} (x^2)^2-2(x^2)(2y^2)+(2y^2)^2 \\\\= x^4-4x^2y^2+4y^4 .\end{array} | 151 |
9,927 | # An artificial satellite of mass m moves in an orbit whose radius is n times the radius of earth. Assuming the resistance to the motion is proportional to square of velocity ie $F= av^2$ where a is a constant. How long will the satellite take to fall to earth. M-mass of earth R- radius of earth
$(a)\;\frac{m}{a} \bigg... | 193 |
9,928 | # Changes
$\frac{\partial M}{\partial y} = \frac{\partial N}{\partial t}$
To find the solution of this equation, we assume that the solution is φ = constant. We can re-write a different form of this equation by substituting $\frac{\partial \phi}{\partial t} = M$ and $\frac{\partial \phi}{\partial y} = N$. This yie... | 128 |
9,929 | # Infimum and Supremum (of sets) - Formal Concept Analysis
I am taking a course of Introduction to Formal Concept Analysis and I have an uncertainty about the definition of supremum (least comum superconcept) and infimum (greatest comum subconcept) of formal concepts:
$$(A_1,B_1)\wedge(A_2,B_2)=(A_1\cap A_2,(B_1\cup ... | 472 |
9,930 | # How do you solve (5n - 1) (n+1) = 0 by factoring?
Aug 17, 2015
The solutions are
color(blue)(n=1/5, n=-1
#### Explanation:
(5n−1)(n+1)=0
This is the factorised form for the equation $5 {n}^{2} + 4 n - 1 = 0$
Since we already have the factors we simply equate them to the R.H.S:
5n−1=0, color(blue)(n=1/5
n+1=0... | 142 |
9,931 | / hep-ex CERN-EP-2016-263
Measurements of top quark spin observables in $t\bar{t}$ events using dilepton final states in $\sqrt{s} = 8$ TeV $pp$ collisions with the ATLAS detector
Pages: 50
Abstract: Measurements of top quark spin observables in $t\bar{t}$ events are presented based on 20.2 fb$^{-1}$ of $\sqrt{s} = ... | 383 |
9,932 | Question
# Which is or are the correct for filament of bulb?A. Low melting pointB. High melting pointC. Made of tungstenD. Made of nichrome
The metal tungsten has the resistivity of $4.8 \times {10^{ - 8}}\;\Omega m$ and the melting point is $3422{\;^ \circ }C$. Hence, it is the suitable material for filament of bulb... | 243 |
9,933 | # Lagrangian of 2 masses connected by a spring
Given: 2 masses are connected by a spring and are sliding down a frictionless inclined plane. They also have a nonzero angular momentum about their COM.
My attempt:
$$L_{com}=T_{com}-U_{com}$$
$$=\frac{1}{2}mv^2-mgh$$
$$=\frac{1}{2}(m_1+m_2)v^2-(m_1+m_2)g(b\sin(\alpha... | 742 |
9,934 | # Rank Condition in 2 Country EZ Model
Wealth.mod (1.7 KB)
Hi Everyone. I am using dynare to solve a simple two country EZ model closely related to Colacito and Croce (2007). It’s a two country endowment economy set up where both country endowments are driven by two state variables (country specific and global), both... | 798 |
9,935 | # Making the left-hand side of a double spread always print the same within part of a document
I wish to print the actual running text* of part of a document only on the right-hand side pages of double spreads, while the left-hand side repeats the same every time because the reader will want to be able to refer to the... | 565 |
9,936 | # Homework Help: Bcs theroy, just an easy algebraic manipulation
1. Sep 24, 2010
### Derivator
bcs theroy, just an "easy" algebraic manipulation
Hi folks,
i'm sitting here for hous and I'm wondering, how one can find formula 3.35' on page 61 in Tinkham's book: http://books.google.de/books?id=k6A...superconductivit... | 374 |
9,937 | # Math Help - Geometry Question
1. ## Geometry Question
If C is the curve parameterised by
t à (cost, sint, cosht):[-pi,pi] à reals ^3
Reparameterise C by arclength?
2. $
s=\int _{- \pi}^t \sqrt{x'^2t)+y'^2(t)+z'^2(t)}dt
$
$
s=\int _{- \pi}^t \sqrt{sin^2 p+cos^2 p+sinh^2 p} \; dp=\int _{- \pi}^t \sqrt{1+sinh^2 p} \... | 280 |
9,938 | location: Publications → journals → CMB
Abstract view
# The stable and unstable types of classifying spaces
Published:1997-09-01
Printed: Sep 1997
• Hyang-Sook Lee
Format: HTML LaTeX MathJax PDF PostScript
## Abstract
The main purpose of this paper is to study groups $G_1$, $G_2$ such that $H^\ast(BG_1,{\bf Z}/p)... | 201 |
9,939 | RUS ENG JOURNALS PEOPLE ORGANISATIONS CONFERENCES SEMINARS VIDEO LIBRARY PACKAGE AMSBIB
General information Latest issue Archive Impact factor Subscription Search papers Search references RSS Latest issue Current issues Archive issues What is RSS
Diskretn. Anal. Issled. Oper.: Year: Volume: Issue: Page:... | 294 |
9,940 | • 论文 •
### 强化大周期统计设计意识，推动大周期设计制度的建立
• 出版日期:2013-11-15 发布日期:2013-11-04
### Strengthening the large period statistical design awareness and promote the establishment of a large period design system
Li Qiang
• Online:2013-11-15 Published:2013-11-04
Abstract: It’s important for statistical design to enhance the abili... | 245 |
9,941 | # Threshold Secret Sharing Requires a Linear Size Alphabet
Andrej Bogdanov
## Affiliation:
The Chinese University of Hong Kong
Shatin, NT
Hong Kong SAR
The Peoples Republic of China
## Time:
Wednesday, 2 March 2016, 16:00 to 17:00
## Organisers:
Abstract: A $t$-out-of-$n$ threshold secret sharing scheme is a pro... | 326 |
9,942 | # Total number of paths between any two nodes - Graph vs. Complete Binary Tree
In a graph, the total number of paths between any two nodes, is given by $n!$. Proof is in this link
In a Complete Binary tree, the total number of paths from root to leaf is basically, the number of leaves, which is $2^{\log_2n - 1}$ and ... | 494 |
9,943 | 1. ## Cyclic groups?
(a) Define what it means for s group to be cyclic.
(b) Give an example of an infinite cyclic group
(c) Determine whether the group U[15] = {1,2,4,7,8,11,13,14}, where multiplication is mod 15, is cyclic.
2. Originally Posted by Jason Bourne
(a) Define what it means for s group to be cyclic.
Tha... | 313 |
9,944 | # Help showing this is an equivalence relation
I need help with question as following:
1. $X= \mathbb{Z}\times \mathbb{Z}$ I need to define the relation $R$ on $X$ as follows:
$(X_1,X_2)R(Y_1,Y_2) \longleftrightarrow (X_1)^2+(X_2)^2=(Y_1)^2+(Y_2)^2$
Can you prove it using (X)R(Y) ?
-
@akerman What parts are you ha... | 383 |
9,945 | # Approximation for the following integral needed
I have following integral $$\int_0^{\infty}e^{-ax-bx^m}dx$$ where $a>0, b>0, m>1$. I can get an approximation for the above integral when $b$ is small. However, I want to get an expression for the case when $b$ is large. Any help in this regard will be highly appreciat... | 464 |
9,946 | Free Version
Easy
# Flux of Charged Isolated Conductor
EANDM-UQICK1
Consider a charged conducting sphere with $r=0.5$m with a surface charge density $\sigma= + 9.2\mu C/m^2$.
What is the electric flux at the surface of the sphere?
A
$3.6\times 10^{5} Nm^2/C$
B
$2.6\times 10^{5} Nm^2/C$
C
$2.6\times 10^{7} Nm^... | 165 |
9,947 | # Q : 3 Raju bought a book for Rs $\small 35.65$. He gave Rs 50 to the shopkeeper. How much money did he get back from the shopkeeper?
Answers (1)
P Pankaj Sanodiya
Total money Raju gave to shopkeeper = Rs 50
The price of the book = Rs 35.65
Money shopkeeper will return Raju = Rs 50.00 - Rs 35.65
= Rs 14.35
He... | 132 |
9,948 | CryptoDB
Paper: Pairing Calculation on Supersingular Genus 2 Curves
Authors: Colm O hEigeartaigh Michael Scott URL: http://eprint.iacr.org/2006/005 Search ePrint Search Google In this paper we describe how to efficiently implement pairing calculation on supersingular genus~2 curves over prime fields. We find that pai... | 268 |
9,949 | #### Volume 18, issue 5 (2018)
Recent Issues
The Journal About the Journal Subscriptions Editorial Board Editorial Interests Editorial Procedure Submission Guidelines Submission Page Ethics Statement Author Index To Appear ISSN (electronic): 1472-2739 ISSN (print): 1472-2747 Other MSP Journals
The profinite completi... | 282 |
9,950 | # Thread: Families of curves... what is b?
1. ## Families of curves... what is b?
Find a formula for a curve of the form for with a local maximum at and points of inflection at and .
2. Hello, purplegirl1818!
$\displaystyle \text{Find a formula for a curve of the form: }\:y \:=\:e^{-\frac{(x-a)^2}{b}}\;\text{ for }... | 879 |
9,951 | Intro to Differential Equations
This is the first in a series of posts I plan on writing about Engineering Mathematics. It assumes prior knowledge of Calculus.
An equation that contains derivatives of one or more functions is called a differential equation. Consider the equation
$$y=e^x$$
The derivative of y with r... | 244 |
9,952 | # Double Integral Calculator
A calculator for double integrals is presented.
## Double Integral
Double integral of the form $\displaystyle \int_{y_1}^{y_2} \int_{x_1}^{x_2} f(x,y) dx dy$
are calculated using the calculator below. The limits of integration may be real numbers or letters such as $a, b ,...$ as param... | 640 |
9,953 | # A 10-lane Olympic-sized swimming pool contains 2 x 10^6 kg of water. If the water is at 0°C, how many kilojoules of energy must be removed to freeze the water in this pool? DeltaH_(fus) for H_2O = 334 J/g
Dec 16, 2016
You must remove 7 ×10^8color(white)(l) "kJ" of energy.
#### Explanation:
The opposite of "enthal... | 379 |
9,954 | Timezone: »
Poster
Regret Circuits: Composability of Regret Minimizers
Gabriele Farina · Christian Kroer · Tuomas Sandholm
Tue Jun 11 06:30 PM -- 09:00 PM (PDT) @ Pacific Ballroom #150
Regret minimization is a powerful tool for solving large-scale problems; it was recently used in breakthrough results for large-scal... | 664 |
9,955 | ### JEE Mains Previous Years Questions with Solutions
4.5
star star star star star
1
### JEE Main 2013 (Offline)
The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
A
– 5.1 eV
B
–10.2 eV
C
+ 2.55 eV
D
– 2.55 eV
## Explanation
Ionization potential of Na means energy r... | 716 |
9,956 | # Documentation
Mathlib.Tactic.Recover
Get all metavariables which mvarId depends on. These are the metavariables which occur in the target or local context or delayed assignment (if any) of mvarId, plus the metvariables which occur in these metavariables, etc.
Equations
• = do let __do_lift ← pure __do_lift.snd
au... | 192 |
9,957 | # Study of $\Upsilon$ production and cold nuclear matter effects in pPb collisions at $\sqrt{s_{NN}}=5~\mathrm{TeV}$
LHCb Collaboration; Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2014). Study of $\Upsilon$ production and cold nuclear matter effects in pPb collisions at $\sqrt{s_{... | 782 |
9,958 | ## Delta G
$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$
$\Delta G^{\circ}= -RT\ln K$
$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$
Sophie 1I
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am
### Delta G
In a sample of 1 mol of gas initially at 1atm and 298K t... | 403 |
9,959 | AC Sonometer
# Our Objective:
To determine the frequency of alternating current using a sonometer.
# The Theory:
A sonometer is an apparatus used to study the transverse vibrations of stretched strings. It is in the form of a hollow wooden rectangular box. On the wooden rectangular box there are two bridges and a p... | 792 |
9,960 | Predictive Hacks
The fair premium in lottery games can be defined as the expected pay-off. For example, consider the game where you roll the die once and you get paid the face value in dollars. So, if you roll 1 you get $1, if you roll 2 you get$2, and so on. Then, the fair price to enter the game is the expected payo... | 396 |
9,961 | # The Bengfort Toolkit
Programming life has finally caused me to give into something that I’ve resisted for a while: the creation of a Bengfort Toolkit and specifically a benlib. This post is mostly a reminder that this toolkit now exists and that I spent valuable time creating it against my better judgement. And as a... | 633 |
9,962 | Thread: laplace transforms View Single Post
Recognitions: Gold Member Science Advisor Staff Emeritus The point is that all three methods: a)$$\displaystyle \mathcal{L}[e^{at}f(t)] = F(s-a),$$ where F(s) is the Laplace transform of t. b)$$\displaystyle \mathcal{L}[tf(t)]= -F'(s)$$ where F(s) is the Laplace transform of... | 168 |
9,963 | Access Harvard FASRC through vscode without entering password & two step code every time
Access Harvard FASRC through vscode without entering password & two step code every time
I usually get annoyed when I need to enter the password and two step verification every time when I need to connect to the server via vscode... | 242 |
9,964 | # Program Synthesis with Pragmatic Communication (@ arXiv 2020)
### Yewen Pu, Kevin Ellis, Marta Kryven, Josh Tenenbaum, Armando Solar-Lezama
Here's the deal. In program synthesis based on input-output examples, there's an obvious problem of massive ambiguity. For example, what is a function that takes the number 2 a... | 208 |
9,965 | • ### A CsI low temperature detector for dark matter search(1602.08884)
Feb. 29, 2016 physics.ins-det
Cryogenic detectors have a long history of success in the field of rare event searches. In particular scintillating calorimeters are very suitable detectors for this task since they provide particle discrimination: th... | 200 |
9,966 | # Homework Help: Velocity of a trolley on an inclined plane with a twist
1. Mar 2, 2010
### sriram_15_93
A friend asked me how to solve this problem:
There is a trolley of mass M$$_{o}$$kg on a fixed inclined plane, whose angle of inclination is $$\theta$$. The block is at a height Hmetres, at the top of the inclin... | 350 |
9,967 | # Not Participating? You're Still Invited To Hack&Roll 2012 (Free Food, Free Hacking!)
## Posted on Feb 16 by ejames
Hi everyone!
You’ve probably realized by now that we’ve got a 24 hour hackathon going on at COM1 Basement, on the 19th to 20th February (that’s this Sunday to Monday).
We know that some of you can’t ... | 535 |
9,968 | # How should I design my particle system to make it easy to add new particle effect types?
Recently I started designing a particle system for a game I develop. But I have some issues with it. I mean, it works but I have a feeling that my design isn't good enough.
So, basically I have a Particle class which contains t... | 907 |
9,969 | # Thread: 7x-6x = 0 ?
1. ## 7x-6x = 0 ?
13x -2(3x -4) = 6(x +2) -4 =
13x -6x +8 = 6x +12 -4 =
7x +8 = 6x +8 =
7x +8 -8 = 6x +8 -8 =
7x - 6x = 6x -6x =x
x or 0 ?
2. Originally Posted by Leona_Marie
13x -2(3x -4) = 6(x +2) -4 =
13x -6x +8 = 6x +12 -4 =
7x +8 = 6x +8 =
7x +8 -8 = 6x +8 -8 =
7x - 6x = 6x -6x =x
x or 0 ?... | 348 |
9,970 | # Zero section of quasi-coherent bundle
Let $$S$$ be a scheme and let $$\mathcal{E}$$ be a quasi-coherent $$\mathcal{O}_S$$-module. Then we can construct a graded quasi-coherent $$\mathcal{O}_S$$-algebra $$\mathscr{A}:= Sym(\mathcal{E})$$ and define the quasi-coherent bundle $$\mathbb{V}(\mathcal{E}) := Spec(Sym(\math... | 889 |
9,971 | # Practice Questions on Permutation-CombinationAptitude Questions and Answers
## Moderate Permutation-Combination Question - 41
Q41. Ten coins are tossed simultaneously. In how many of the outcomes will the third coin turn up a head?
A. $2^{10}$ B. $2^9$ C. $3 × 2^8$ D. $\text{None of these}$
## Moderate Permutati... | 518 |
9,972 | David Lewis
2021-12-23
Identify the functions represented by the following power series. $\sum _{k=0}^{\mathrm{\infty }}{\left(-1\right)}^{k}\frac{{x}^{k}}{{3}^{k}}$
limacarp4
Expert
Given series
$\sum _{k=0}^{\mathrm{\infty }}{\left(-1\right)}^{k}\frac{{x}^{k}}{{3}^{k}}$
The Power series representation of ${\left... | 334 |
9,973 | # If a triangle has sides of length 8cm, 8cm, and 5cm, how do I find the measure of the angle between the two equal sides?
Nov 15, 2015
Use the cosine rule to find the angle as $36 , {42}^{\circ}$.
#### Explanation:
The cosine rule states that for a triangle of sides $a , b , \mathmr{and} c$, and with angle $\theta... | 242 |
9,974 | # zbMATH — the first resource for mathematics
Local properties of algebraic group actions. (English) Zbl 0722.14032
Algebraische Transformationsgruppen und Invariantentheorie, DMV Semin. 13, 63-75 (1989).
[For the entire collection see Zbl 0682.00008.]
Let G be a connected linear algebraic group and X be a normal G-va... | 272 |
9,975 | Please Note: Since switching off collaborative editing leads to an unstable operation of Confluence, this feature must remain enabled. For this reason, the problem of editing an earlier version of a page still exists. Therefore, please check the content of the edited version of a page with the currently displayed conte... | 724 |
9,976 | # How do I re-attach this FFC cable to this connector?
While trying to detach the cable, I pushed out the black part, which came out from the opposite side of where the cable enters the connector.
The cable was previously tightly clipped in place and came loose after the black part came out.
How do I re-attach the c... | 369 |
9,977 | # Proof about floor function: $\lfloor x\rfloor+\lfloor x + \frac{1}{n} \rfloor+\cdots + \lfloor x + \frac{(n-1)}{n} \rfloor = \lfloor nx \rfloor$ [duplicate]
How can we prove that $$\left\lfloor x\right\rfloor + \left\lfloor x + \frac{1}{n} \right\rfloor + \left\lfloor x + \frac{2}{n} \right\rfloor + \cdots + \left \... | 817 |
9,978 | varimax
0th
Percentile
Keywords
multivariate
Usage
varimax(x, normalize = TRUE, eps = 1e-5)
promax(x, m = 4)
Arguments
x
A loadings matrix, with $p$ rows and $k < p$ columns
m
The power used the target for promax. Values of 2 to 4 are recommended.
normalize
logical. Should Kaiser normalization be performed? If ... | 522 |
9,979 | A way to rotate a tachyon plot
I can rotate a plot3d using the Java viewer, and then take an image. I'd like to use tachyon, but then how do I choose the right angle to take the picture?
I'd like to rotate the whole plot, or in other words, "place the camera in an arbitrary position"?
edit retag close merge delete
... | 955 |
9,980 | Corpus ID: 12784656
Controlling for Latent Homophily in Social Networks through Inferring Latent Locations
@article{Shalizi2016ControllingFL,
title={Controlling for Latent Homophily in Social Networks through Inferring Latent Locations},
author={C. Shalizi and Edward McFowland},
journal={ArXiv},
year={2016},
volume={... | 320 |
9,981 | Thomas Prellberg
The Combinatorics of the leading root of Ramanujan’s function
When/Where:
August 21, 2015, 1:55 — 2:45pm at LIT 368.
Abstract:
I consider the leading root $$x_0(q)$$ of Ramanujan’s function
$$\sum\limits_{n=0}^\infty\frac{(-x)^nq^{n^2}}{(1-q)(1-q^2)\ldots(1-q^n)}$$.
I prove that its formal power s... | 234 |
9,982 | # Mathematics: Multiplicity and Curve Sketching
## Roots of multiplicity r
• A root of a polynomial is a value of $$x$$ for which $$P(x)=0$$
• For example, $$P(x)=x^2+6x+9$$ can be expressed as $$(x+3)^2$$
• In this case, $$-3$$ is a root of multiplicity 2 of $$P(x)$$
• Roots of multiplicity 1 are also known as “sing... | 318 |
9,983 | # Bistatic Doppler shift
Bistatic Doppler shift
Bistatic Doppler shift is a specific example of the Doppler effect that is observed by a radar or sonar system with a separated transmitter and receiver. The Doppler shift is due to the component of motion of the object in the direction of the transmitter, plus the comp... | 844 |
9,984 | # GRBModel()
Filter Content By
Version
Languages
### GRBModel()
Constructor for GRBModel. The simplest version creates an empty model. You can then call addVar and addConstr to populate the model with variables and constraints. The more complex constructors can read a model from a file, or make a copy of an existing... | 352 |
9,985 | 1. Sep 16, 2007
### Jacobpm64
1. The problem statement, all variables and given/known data
Assign a grade of A (excellent) if the claim and proof are correct, even if the proof is not the simplest or the proof you would have given. Assign an F (failure) if the claim is incorrect, if the main idea of the proof is inco... | 711 |
9,986 | How can I flush left text in the align environment?
I have the following code:
\begin{align*}
m^+\cdot k^+ &= m^+\cdot k+m^+ &\text{by M2}\\
&= m\cdot k+k+m^+ &\text{since $k\in B$}\\
&= m\cdot k+(k+m^+) \\
&= m\cdot k+(k^{+}+m) &\text{by the second result}\\
&= m\cdot k+m+k^+ &\text{commutativity of addition}\\
&= m... | 558 |
9,987 | # How does the scalarproduct look like, popular kernel functions compute
So far as I understood kernels, they compute a dot product of the vectors
$k(x_i,x_j) = \langle\phi(x_i),\phi(x_j)\rangle$
where $\phi$ goes from original lower dimensional space to a higher dimensional space. The most popular ones are the poly... | 462 |
9,988 | # NEET Physics Nuclei Questions Solved
The nucleus ${}_{92}{}^{234}\mathrm{U}$ splits exactly in half in a fission reaction in which two neutrons are released. The resultant nuclei are
(a) ${}_{46}{}^{116}\mathrm{Pd}$ (b) ${}_{45}{}^{117}\mathrm{Rh}$
(c) ${}_{45}{}^{116}\mathrm{Rh}$ (d) ${}_{46}{}^{117}... | 165 |
9,989 | # How do you express 275 mmHg in atm. and Pascal?
#### Risposta:
1 "atm" = 760 mm*Hg = 101.32 kPa
#### Spiegazione:
Of course, pressure is not measured in millimetres of mercury, but in force per unit area. If you go thru the math, and I don't propose to do so, it turns out that a column of mercury 760 mm high exer... | 404 |
9,990 | # Linear algebra: Projections
Let $P$, $Q:E\rightarrow E$, be projections and $PQ=QP$, show that $N(P)+N(Q)=N(PQ)$, $N(P)$ stands for Kernel of $P$
As $P$, $Q$ are projections and $PQ=QP$ then $PQ$ is a projection, so $E= N(PQ)\oplus \text{Im}(PQ)$ and also $E=N(P)\oplus \text{Im}(P)=N(Q)\oplus \text{Im}(Q)$. It's ea... | 830 |
9,991 | menu
Hit Return to see all results
Chapter 11.4, Problem 21E
BuyFindarrow_forward
### Mathematical Applications for the ...
11th Edition
Ronald J. Harshbarger + 1 other
ISBN: 9781305108042
#### Solutions
Chapter
Section
BuyFindarrow_forward
### Mathematical Applications for the ...
11th Edition
Ronald J. Harshbar... | 695 |
9,992 | ## Calculus with Applications (10th Edition)
$$f(x)=\frac{\ln x}{ x^{2}} ; \quad\quad[1,4]$$ The critical number in the given interval is: $e ^{\frac{1}{2}}$. The absolute maximum, $0.18393$ occurs when $x=e ^{\frac{1}{2}}$ and the absolute minimum, $0$ occurs when $x=1.$
$$f(x)=\frac{\ln x}{ x^{2}} ; \quad\quad[1,4]$... | 765 |
9,993 | # Kerodon
$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$
Remark 3.5.1.8. Every simplicial set $X$ can be realized as a union $\bigcup _{X' \subseteq X} X'$, where $X'$ ranges over the collection of finite simplicial subsets of $X$ (to prove this, we observe that every $n$-simplex $\sigma$ is contained in a finite simplici... | 217 |
9,994 | # How many molecules are there in 24 grams of FeF_3?
Jan 11, 2017
$1.2 \times {10}^{23}$ molecules.
#### Explanation:
The SAME number of molecules are in ANY “mole” of a compound or element. So, you only need to multiply the number of moles given by Avogadro's Number to find how many molecules there are.
Moles are... | 252 |
9,995 | # zbMATH — the first resource for mathematics
Convergence of an explicit finite volume scheme for first order symmetric systems. (English) Zbl 1030.65110
The aim of this paper is to derive an $$o(h^{1/2})$$ error estimate for classical upwind, explicit in time, finite volume scheme for linear first order symmetric sys... | 185 |
9,996 | # Will the following reaction take place? "Mg + PbCl"_2"rarr"MgCl"_2 + "Pb"
Jun 8, 2015
Yes.
#### Explanation:
In a single replacement (displacement) reaction involving metals, an elemental metal replaces a metal in a compound. The general equation is A + BX $\rightarrow$ B + AX, where A and B are metals.
In order... | 229 |
9,997 | # Chapter 4 Stoichiometry: Quantitative Information about Chemical Reactions - Study Questions - Page 179h: 95
Sn
#### Work Step by Step
Number of moles of $O$: $(0.452-0.356)\ g\div 15.9994\ g/mol= 6.00\ mmol$, $3.00\ mmol$ of M Atomic weight of M: $0.356\ g\div 0.003\ mol= 118.7\ g/mol$, closest to Sn
After you c... | 147 |
9,998 | MRCZ meta-compressed image file-format library
## Project description
MRCZ is a highly optimized compressed version of the popular electron microscopy MRC image format. It uses the Blosc meta-compressor library as a backend. It can use a number of high-performance loseless compression codecs such as ‘lz4’ and ‘zstd’,... | 131 |
9,999 | # Softball Bat Speed vs Bat Weight
1. Jun 21, 2011
### arsenal1021
Ok So I have been wondering this for awhile.
Could someone help me find an equation to figure this out.
I play slowpitch softball and was curious about swing speed and the weight of the bat.
If we keep the mass of the ball constant (.198 kg), and t... | 594 |
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