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MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17120 | # Kruskal-Katona type question for union-closed families of sets
Question : Let $n,k$ be two positive integers with $n \geq k$. Let $\mathcal{F}$ be a family of $C(n,k)$ sets, each of size $k$, and let $<\mathcal{F}>$ denote the union-closed family generated by $\mathcal{F}$, i.e.: $<\mathcal{F}>$ consists of all thos... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17121 | ## anonymous one year ago Let f(x) = 4x2 + x + 1 and g(x) = x2 – 2. Find g(f(x)). Show each step of your work. Help please
1. anonymous
@marihelenh can you help me with this one too?
2. anonymous
@freckles
3. marihelenh
You would replace what you have for f(x) into the x position of g(x). $\left( 4x ^{2}+x+1 \rig... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17122 | # If $A=\begin{bmatrix}1&2\\3&-5\end{bmatrix}$ then $A^{-1}$=
$\begin{array}{1 1}(A)\;\begin{bmatrix}-5&-2\\-3&1\end{bmatrix}\\(B)\;\begin{bmatrix}5/11&2/11\\3/11&-1/11\end{bmatrix}\\(C)\;\begin{bmatrix}-5/11&-2/11\\-3/11&1/11\end{bmatrix}\\(D)\;\begin{bmatrix}5&2\\3&-1\end{bmatrix}\end{array}$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17123 | # Buying pants at the mall
Originally posted on What's new:
The classical inverse function theorem reads as follows:
Theorem 1 ($latex {C^1}&fg=000000$ inverse function theorem) Let $latex {\Omega \subset {\bf R}^n}&fg=000000$ be an open set, and let $latex {f: \Omega \rightarrow {\bf R}^n}&fg=000000$ be an continuo... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17124 | It is currently 11 Dec 2017, 18:03
### 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.
Customized
for You
we will pick new questions that match your level based o... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17125 | # 11. Consider the titration of 25.00 mL of 0.200 M methyl amine (CH3NH2). The titrant is...
###### Question:
11. Consider the titration of 25.00 mL of 0.200 M methyl amine (CH3NH2). The titrant is 0.120 M HCI. Calculate each of the following: a. the initial pH of the base. b. the pH at 5.00 mL added acid c. the pH a... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17126 | # Moving the branch cut of the complex logarithm
The complex logarithm is defined as $\log z:=\operatorname{Log} |z|+i\arg z$ , with the branch cut on the non-negative real axis.
Determine a branch of $f(z)=\log(z^3-2)$ that is analytic at $z=0$ and find $f(0)$ and $f'(0)$.
So, I would need to choose a branch of the... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17127 | # Suppose x and y are two arbitrary, distinct (unequal) real numbers. Prove that there exists a rational number q between x and y.
I thought this proof was much simpler than it actually is. I used an Axiom that states, "if $p$ and $q$ are real numbers, then there is a number between them, i.e: $$\frac{(p + q)}{2}$$ My... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17128 | • # question_answer Among $[Ni{{(CO)}_{4}}],{{[NiC{{l}_{4}}]}^{2-}},[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl,$ $N{{a}_{3}}[Co{{F}_{6}}],N{{a}_{2}}{{O}_{2}}$ and $Cs{{O}_{2}}$ the total number of paramagnetic compounds is A) 2 B) 3 C) 4 D) 5
Compound/ Ion of compound Magnetic nature 1. $[Ni{{(CO)}_{4}}]$ Diamagnetic 2. ${... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17129 | author = "Abreu, L. D."
1
Found 7 documents, displaying page 1 of 1
## Completeness criteria for sequences of special functions
Author(s) : Abreu, L. D.
Description : Two Lp completeness criteria for sequences of functions written in the form f(lnx), where ln is the nth zero of another function g, are obtained. The ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17130 | # Differentiating $90 + 45 \cos(t^2/18)$ using the chain rule?
Can someone please explain to me how to differentiate this function?
$$90 + 45 \cos(t^2/18)$$
I know you use the chain rule, but I can't get the final result correct.
-
$$\zeta(t)=90+45\cos\left(\frac{t^2}{18}\right)$$ \require{cancel}\begin{align} \fr... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17131 | # Start a new discussion
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MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17132 | # If a definite integral produces a finite value, does that mean it's convergent?
$\int{_0^5\frac{x}{x-2}dx}$
This integral produces a finite value of 5+ln(9/4). However, according to Wolfram Alpha, it diverges (http://www.wolframalpha.com/input/?i=integral+of+x%2F%28x-2%29+from+0+to+5). How can I tell that this inte... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17133 | # 13.6 Binomial theorem (Page 3/6)
Page 3 / 6
## Key equations
Binomial Theorem ${\left(x+y\right)}^{n}=\sum _{k-0}^{n}\left(\begin{array}{c}n\\ k\end{array}\right){x}^{n-k}{y}^{k}$ $\left(r+1\right)th\text{\hspace{0.17em}}$ term of a binomial expansion $\left(\begin{array}{c}n\\ r\end{array}\right){x}^{n-r}{y}^{... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17134 | Home » Math Theory » Numbers » Cardinal Numbers
# Cardinal Numbers
## Introduction
In mathematics, we come across different types of sets of numbers that have their own characteristics. One such type of number is the cardinal numbers. So, what are these numbers and how are they used? Let us find out.
## History of ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_17135 | ### Home > PC > Chapter 5 > Lesson 5.1.2 > Problem5-22
5-22.
Find a function that has a vertical asymptote at $x=−7$ and a horizontal asymptote at $y=5$.
Your function should be in the form:
$y=\frac{1}{x-h}+k$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20208 | # Combinatorics using averages
How many solutions exist for $$x+2y+4z=100$$ in non-negative integers?
The author, Martin Erickson, in his book, Aha! Solutions, published by MAA, gives the following brief solution :
There are $$26$$ choices for $$z$$, namely, all integers from $$0$$ to $$25$$. Among these choices, th... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20209 | Question
# Which of the following images is that of a desert?
Solution
## The correct option is A Deserts are large dry areas which have very little vegetation. They are usually covered with sand. The below given image is that of a desert.
Suggest corrections |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20210 | # How do you solve 1/2x + 1/3y = 5 and 1/4x + y = 10 using substitution?
May 26, 2018
$x = 4 , y = 9$
#### Explanation:
From the second equation we get
$y = 10 - \frac{1}{4} x$
plugging this in the first one
$\frac{1}{2} x + \frac{1}{3} \left(10 - \frac{1}{4} x\right) = 5$
$\frac{1}{2} x + \frac{10}{3} - \frac{1}{... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20211 | ## Not signed in
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MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20212 | <img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
# 4.5: The Binomial Probability Distribution
Difficulty Level: At Grade Created by: CK-12
## Learning Objectives
• Know the characteristics of a binomial random variable.
• Understand ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20213 | ## Second derivative of an integral
Good day,
I don't understand the following:
$$\frac{d^{2}}{dt^{2}}\int_{0}^{t}(t-\epsilon )\phi (\epsilon)d\epsilon=\phi''(t)$$
All I know is:
$$\frac{d^{2}}{dt^{2}}\int_{0}^{t}(t-\epsilon )\phi (\epsilon)d\epsilon=\frac{d^{2}}{dt^{2}}\int_{0}^{t}t \cdot \phi (\epsilon)d\epsilon... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20214 | ## Ramanujan Misterious PI formula..
Is there any mathematical explanation to the incredible fast converging formula by Ramanujan?:
$$\frac{2\sqrt{2}}{9801} \sum^\infty_{k=0} \frac{(4k)!(1103+26390k)}{(k!)^4 396^{4k}}=\frac{1}{\pi}$$
or simply "ocurred to him" and put it on a paper.
PhysOrg.com science news on Phys... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20215 | # High School Math : How to find the volume of a prism
## Example Questions
### Example Question #1 : How To Find The Volume Of A Prism
Find the volume of the following triangular prism.
Explanation:
The formula for the volume of a triangular prism is:
Where is the length of the triangle, is the width of the tr... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20216 | Hot Topics
# IL state football champs to be crowned this weekend
#### Voxitatis has applied a modified version of its mathematical model to predict all eight football titles in Illinois, but, like last year, we are waiting until after the Class 8A game is played to publish those predictions.
Our reason for doing thi... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20217 | <meta http-equiv="refresh" content="1; url=/nojavascript/"> Whole Number Exponents ( Read ) | Arithmetic | CK-12 Foundation
You are viewing an older version of this Concept. Go to the latest version.
# Whole Number Exponents
%
Progress
Practice Whole Number Exponents
Progress
%
Whole Number Exponents
Have you ever b... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20218 | ## Chapter 14 # 107
$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$
Tim Foster 2A
Posts: 73
Joined: Fri Sep 29, 2017 7:07 am
### Chapter 14 # 107
Why do we use E(naught)=lnK for this problem, instead of E=E(naught)-lnQ in which Enaught would be zero (PH7)
I paraphrased the equations because I'm lazy |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20219 | A calculus of the absurd
10.4 Planes
This is a Further Maths topic.
TODO
In the meantime, http://www.mit.edu/~hlb/1802/pdf/MIT18_02SC_notes_6.pdf was pretty helpful. |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20220 | An ideal in a Noetherian ring is nilpotent if each element of the ideal is nilpotent.
Lemma 10.32.5. Let $R$ be a Noetherian ring. Let $I, J$ be ideals of $R$. Suppose $J \subset \sqrt{I}$. Then $J^ n \subset I$ for some $n$. In particular, in a Noetherian ring the notions of “locally nilpotent ideal” and “nilpotent i... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20221 | Of Two Time Indices
In the appendix to a paper I am currently co-authoring, I recently wrote the following within a parenthetical excursus:
When talking of dynamical systems, our probability assignments really carry two time indices: one for the time our betting odds are chosen, and the other for the time the bet con... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20222 | # Example 410 x r n with x y iff x i y i i 1 n is a
• Notes
• 119
This preview shows page 37 - 40 out of 119 pages.
##### We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
The document you are viewing contains questions related to this textbook.
Chapter 6 /... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_20223 | # Newbie
• August 15th 2012, 10:03 AM
Rpuxster
Newbie
So glad I found this site .... I have alot of questions, so please be patient with me :P ... so here goes, how do you denote the square root cubed?
Found this .... though.
$\sqrt{y=1}$
• August 15th 2012, 12:28 PM
HallsofIvy
Re: Newbie
Quote:
Originally Posted by... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_384 | # Testing $H_0: \beta_1 = \beta_2$ in a model $Y = \alpha + \beta_1x_1+ \beta_2x_2 + \varepsilon$
Consider a linear regression model $$Y = \alpha + \beta_1x_1+ \beta_2x_2 + \varepsilon$$, and suppose we are interested in testing $$H_0: \beta_1 = \beta_2$$. These slopes are two population slopes.
This means that under... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_385 | # zbMATH — the first resource for mathematics
## Akahira, Masafumi
Compute Distance To:
Author ID: akahira.masafumi Published as: Akahira, Masafumi; Akahira, M.
Documents Indexed: 130 Publications since 1975, including 9 Books Reviewing Activity: 54 Reviews Biographic References: 1 Publication
all top 5
#### Co-Au... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_386 | # What is the axis of symmetry and vertex for the graph y= -7x^2 +2x?
Jul 7, 2018
$x = \frac{1}{7} , \text{ vertex } = \left(\frac{1}{7} , \frac{1}{7}\right)$
#### Explanation:
$\text{calculate the zeros by letting y = 0}$
$- 7 {x}^{2} + 2 x = 0$
$x \left(- 7 x + 2\right) = 0$
$x = 0 , x = \frac{2}{7} \leftarrow... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_387 | # Applying Initial Conditions
#### MathematicalPhysics
I need to find all the separated solns of
$$x^2 \frac{\partial^2 u}{\partial x^2} + x\frac{\partial u}{\partial x} + \frac{\partial^2 u}{\partial y^2} = 0$$
in the strip $${(x,y) : 0 < y < a, -\infty < x < \infty }$$
the separated solns must also satisfy u = 0 ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_388 | # 78 of 100: Visualizing Algebra
Algebra Level 1
What equation does this image correspond to?
The same setup can also be used to give a general formula using $n.$
× |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_389 | # How do you combine like terms in (6+ 8i ) + ( 1- 9i )?
May 18, 2018
$\left(7 - i\right)$
#### Explanation:
$\left(6 + 8 i\right) + \left(1 - 9 i\right)$
$\left(6 + 8 i + 1 - 9 i\right)$
$\left(6 + 1 + 8 i - 9 i\right)$
$\left(7 - i\right)$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_390 | # Coefficients from Stone Weierstrass versus Fourier Transform
Usually one shows the density of the functions $\sin(kx)$ in $L^2([0,1])$ using the Fourier transform. This in fact comes from the Stone-Weirstrass theorem however and then uses the density of continuous functions in $L^2([0,1])$.
However, the Stone Weirs... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_391 | # Change of basis matrix verification
Let $B$ and $C$ be two bases. To find the change of basis matrix $\phi_{B,C}$, I compute $\phi_{SB,B}$ and $\phi_{SB,C}$. Create the new matrix $T=[\phi_{SB,B}|\phi_{SB,C}]$. Reducing it to reduced row echelon form, should yield $T=[I|\phi_{B,C}$, right? Is there a way to verify t... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_392 | ## College Algebra (6th Edition)
$y=\displaystyle \frac{1}{3}x-2$ $y=\displaystyle \frac{1}{3}x+2$
A graphical solution to a system of linear equations is a point of intersection of two lines. If the solution set is empty, the lines do not intersect. They are parallel. From the graph, the pair of parallel lines have e... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_393 | Atomic Number The mass number is the total number of an atom’s protons and neutrons. Which isotope of hydrogen is present in heavy... What is the most common isotope of silicon? Learn what an ion is and how it forms. for any atom with a + or - charge, # protons will not = # electrons. The atomic number of Pb from the p... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_394 | Approximating erf by tanh - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-22T19:14:24Z http://mathoverflow.net/feeds/question/117735 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/117735/approximating-erf-by-tanh Approximating erf by tanh Aryeh Kontorovich 201... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_395 | # How do you find the value of 16^(1/4)?
May 16, 2018
2
#### Explanation:
${16}^{\frac{1}{4}} =$
$\sqrt[4]{16} =$
$\sqrt[4]{2 \cdot 2 \cdot 2 \cdot 2} =$
$2$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_396 | # Can you find the solution?
Algebra Level 5
The number of solutions (x, y, z) to the system of equations $x+2y+4z=9$ $4yz+2xz+xy=13$ $xyz=3$ such that at least two of x, y, z are integers is $Note-\:\:Its\:\:an\:\:old\:\:KVPY\:\:question$
×
Problem Loading...
Note Loading...
Set Loading... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_397 | # Ngô Quốc Anh
## September 9, 2016
### Benefits of “complete” and “compact” for analysis on Riemannian manifolds
Filed under: Riemannian geometry — Tags: — Ngô Quốc Anh @ 10:08
When working on Riemannian manifolds, it is commonly assumed that the manifold is complete and compact. (The case of non-compactness is al... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_398 | ## The smoothness of solutions to nonlinear variational inequalities.(English)Zbl 0278.49011
Consider a variational inequality: $u\in K\quad\text{and}\quad \int_\Omega Au(v-u)\,dx\geq \int_\Omega f(v-u)\quad \forall v\in K$ where $$K=\{v: v\geq \psi \;\text{in}\;\Omega\;\text{and}\;v=0\;\text{on}\;\partial\Omega\}$$ a... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_399 | ### Body-centered cubic problems
Problem #1: The edge length of the unit cell of Ta, is 330.6 pm; the unit cell is body-centered cubic. Tantalum has a density of 16.69 g/cm3.
(a) calculate the mass of a tantalum atom.
(b) Calculate the atomic weight of tantalum in g/mol.
Solution:
1) Convert pm to cm:
330.6 pm x 1... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3472 | # What is a primitive point on an elliptic curve?
While working with elliptic curves for cryptography reasons, I found the notion of a primitive point, but no definition.
For example, $P(0,6)$ is a primitive point on the elliptic curve $y^2\equiv x^3+2x+2 \mod 17$. What does that mean? How can I tell if a point is pri... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3473 | ### The equation of a tangent which is parallel to a given line
Thứ sáu - 31/01/2020 11:06
This article shows how to write the equation of a tangent which is parallel to a given line.
The following facts are regularly used.
$(i)$ If $\left( d \right)$ has its equation of form $\left( d \right):y = kx + b$, then its ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3474 | Tuesday
March 3, 2015
# Homework Help: Calculus
Posted by John on Monday, March 4, 2013 at 12:30am.
Given that \displaystyle \int_0^4 x^3\sqrt{9+x^2} dx = a, what is the value of \lfloor a \rfloor?
• Calculus - Steve, Monday, March 4, 2013 at 4:44am
I get 14
Related Questions
Calculus - Given that \displaystyle \... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3475 | ## Sunday, 31 January 2016
### On This Day in Math - January 31
Joost Bürgi nich at Kepler monument
The capacity to blunder slightly is the real marvel of DNA.
Without this special attribute, we would still be anaerobic bacteria
and there would be no music.
The 31st day of the year; 31 = 22 + 33, i.e., The elevent... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3476 | This is an old version, view current version.
## 11.1 Suffix Marks Type of Function
The suffix is determined by the type of function according to the following table.
function outcome suffix
log probability mass function discrete _lpmf
log probability density function continuous _lpdf
log cumulative distribution fun... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3477 | Language: Search: Contact
Zentralblatt MATH has released its new interface!
For an improved author identification, see the new author database of ZBMATH.
Query:
Fill in the form and click »Search«...
Format:
Display: entries per page entries
Zbl 1175.34035
Zhou, Jianwen; Li, Yongkun
Existence and multiplicity of s... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3478 | # Bianchi Identity-where did I go wrong?
zn5252
hello ,
In the Bianchi Identities of the second kind, we have ∇a Rbcde + ∇b Rcade + ∇c Rabde ≡ 0
but since ∇c Rabde = - ∇c Rbade
we get :
in the last term, we exchange the c and the b indices and we would arrive at:
∇a Rbcde = 0 .
but this incorrect ? did I do something ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3479 | # How do you factor x^2+ 11x = 180?
May 24, 2015
First subtract $180$ from both sides to get:
${x}^{2} + 11 x - 180 = 0$
Noticing that the coefficient of ${x}^{2}$ is $1$ and the signs of the other two coefficients, this may factorize as:
$\left(x + a\right) \left(x - b\right) = {x}^{2} + \left(a - b\right) x - a ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3480 | # Lesson 21
One Hundred and Eighty
## 21.1: What Went Wrong? (10 minutes)
### Warm-up
The purpose of this activity is for students to analyze a proof and decide whether each step makes sense. By finding the error in this proof students reinforce their understanding that corresponding angles are only congruent when ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3481 | # How to characterize the properties, as opposed to predicates expressing such properties, of mathematical objects?
More Abstract Background for my Question
Assuming a sort of realism about mathematical objects, there is an intuitive notion of the properties a mathematical object instantiates which is non-linguistic.... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3482 | GMAT Question of the Day - Daily to your Mailbox; hard ones only
It is currently 16 Aug 2018, 12:47
### 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... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3483 | Short-time dynamics of finite-size mean-field systems
# Short-time dynamics of finite-size mean-field systems
Celia Anteneodo Departmento de Física, PUC-Rio and National Institute of Science and Technology for Complex Systems, Rua Marquês de São Vicente 225, Gávea, CEP 22453-900 RJ, Rio de Janeiro, Brazil Ezequiel... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3484 | # Higher Derivatives of Exponential Function
## Theorem
Let $\exp x$ be the exponential function.
Then:
$\map {\dfrac {\d^n} {\d x^n} } {\exp x} = \exp x$
### Corollary
Let $c$ be a constant.
Then:
$\map {\dfrac {\d^n} {\d x^n} } {\map \exp {c x} } = c^n \map \exp {c x}$
## Proof
Proof by induction:
For all ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3485 | How much lift does the wing attach fitting actually carry?
How do I calculate the lift force that the the bolt that join the wings to the fuselage of a strutted or braced airplane carry?
I know in a cantilever airplane,the bolts have to carry all of the lift load on a wing but how about a strutted airplane - how do t... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3486 | # Thread: 15.2.63 Reverse the order of integration in the following integral
1. ## 15.2.63 Reverse the order of integration in the following integral
$\textsf{Reverse the order of integration in the following integral and find the value of }$
\begin{align*}\displaystyle
I&=\int_0^3 \int_y^{3} x^2 e^{xy} dxdy
\end{ali... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_3487 | # Chapter 4 - Section 4.1 - Angles and Radian Measure - Exercise Set - Page 532: 30
#### Work Step by Step
To convert degrees to radians, multiply degrees by $\frac{\pi radians}{180°}.$ So 76° = 76$^{\circ}$ x $\frac{3.142}{180°}$ = 1.33 radians.
After you claim an answer you’ll have 24 hours to send in a draft. An ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14160 | # Kerodon
$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$
Notation 5.1.1.11. Let $q: X \rightarrow S$ be a right fibration of simplicial sets, and let $e: s \rightarrow s'$ be an edge of the simplicial set $S$. We will often use the symbol $e^{\ast }$ to denote a morphism of Kan complexes $X_{s'} \rightarrow X_{s}$ which i... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14161 | # In Q. No. 14, write the sign of c.
Question:
In Q. No. 14, write the sign of c.
Solution:
The parabola $y=a x^{2}+b x+c$ cuts $y$-axis at point P which lies on $\mathrm{y}$-axis. Putting $x=0$ in $y=a x^{2}+b x+c$, we get $y=c$. So the coordinates of P are $(0, c)$. Clearly, P lies on OY. Therefore $c>0$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14162 | # Homework Help: Photoelectric effect and Rydberg's formula
1. Sep 29, 2009
### iuchem16
A peak in the energy spectrum is seen at 134.2 keV when using a germanium detector. In coincidence with this, an x-ray corresponding to the 2s to 1s electronic transition in germanium is detected. Find the energy (in keV) of the... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14163 | # Question No.4
#### Topic : Solving Pipe Networks using Quantity Balance Method
If in the network shown in the following figure the flow to C is regulated by a valve to 100 lit/sec, calculate the effect on the flows to the other reservoirs; determine the head loss to be provided by the valve.
Data :
Pipe Length (... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14164 | # Mirror Image
## Deriving Gibbs distribution from stochastic gradients
Stochastic gradients is one of the most important tools in optimization and machine learning (especially for Deep Learning – see for example ConvNet). One of it’s advantage is that it behavior is well understood in general case, by application of... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14165 | # Why/When we need the axiom schema of replacement?
In a quite informal way the axiom schema of replacement says that
Let $X$ be a set.
Let $\phi(x,y)$ a formula s.t. for each $x$ in $X$ there exists an unique set $y$ satisying $\phi$.
Then there exists the family $Y$ composed by all such $y$.
Therefore even if I ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14166 | # a solid right cylinder is 18 cm high and the radius of the base is 7 cm .two equal right cones are drilled on the plane faces of the cylinder , height of each cone being1/3rd the height of the cylinder and the radius of base of each cone being equal to base of the cylinder . find the total surface area of the remain... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14167 | # Leonhard Euler
Jump to navigation Jump to search
Main Article
Discussion
Related Articles [?]
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Citable Version [?]
This editable, developed Main Article is subject to a disclaimer.
Leonhard Paul Euler (15 April 1707 - 18 September 1783) was a pioneering Swiss mathematician a... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14168 | # Distance covered by point on the rim
Given a circular wheel that is rotating at the rate of 25 revolutions per minute. If the radius of the wheel is 50 cms, what could be the distance covered by a point on the rim in one second (Given the π = 3.1416)
Any takes? Thanks.
-
Just use conversion factors. One revolution... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14169 | # If 1 2 3 12 x A é ù = ê ú ë û – and 1 y B x é ù ê ú = ê ú ê ú ë û be such that 6 AB 8 é ù = ê ú ë û , then:
Question:
If $A=\left[\begin{array}{ccc}1 & 2 & x \\ 3 & -1 & 2\end{array}\right]$ and $B=\left[\begin{array}{l}y \\ x \\ 1\end{array}\right]$ be such that $\mathrm{AB}=\left[\begin{array}{l}6 \\ 8\end{array}... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14170 | +0
0
281
3
The vertex of the right isosceles triangle is the center of the square. What is the area of the overlapping region?
May 27, 2021
#1
0
The area of the overlapping region is 20.
May 27, 2021
#2
0
Could you explain your reasoning a bit to help me understand?
Guest May 27, 2021
#3
+26321
+1
$$\begin{arr... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14171 | ## BdMO National Higher Secondary 2014/2
Discussion on Bangladesh Mathematical Olympiad (BdMO) National
samiul_samin
Posts: 1007
Joined: Sat Dec 09, 2017 1:32 pm
### BdMO National Higher Secondary 2014/2
Closing his eyes Tawsif begins to plca knights on a Chess board of $21\times 23$.After plcing how many knights Ta... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14172 | Address 4615 70th Ave, Kenosha, WI 53144 (262) 652-2626 http://www.tg3electronics.com/contact-us
# linear fit standard error Somers, Wisconsin
Previous company name is ISIS, how to list on CV? There is no contradiction, nor could there be. It is sometimes useful to calculate rxy from the data independently using this... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14173 | # Derivation of nonlinear Gibbs measures from many-body quantum mechanics
```@article{Lewin2014DerivationON,
title={Derivation of nonlinear Gibbs measures from many-body quantum mechanics},
author={Mathieu Lewin and Phan Th{\`a}nh Nam and Nicolas Rougerie},
journal={arXiv: Mathematical Physics},
year={2014}
}```
• Pub... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00004-of-00114-3158c787ea8296d3_doc_14174 | Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles an... |
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