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MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_46 | # Math Help - How fast was Joe Riding His motorcycle?
1. ## How fast was Joe Riding His motorcycle?
Joe was riding his motorcycle along a freeway when he noticed that his
bike had 15,951 miles – a palindrome. A palindrome is a number
or a word that reads exactly the same, either forward or backward. He
was surprised ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_47 | # Field from Potential (Homework 3-323)
3. Find the fields, the charge density and the current density corresponding to $V(\overrightarrow{r},t)=0$ and $A(\overrightarrow{r},t)=\frac{1}{4\pi\epsilon0}*\frac{e(t0-t)}{r^2}*\overrightarrow{r0}$ where $e$ and$t0$ are constants.
The potentials are:
$V(r ⃗,t)=0$ and $A ⃗(... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_33 | # Artificial neural network
An artificial neural network (ANN), usually called "neural network" (NN), is a mathematical model or computational model that tries to simulate the structure and/or functional aspects of biological neural networks. It consists of an interconnected group of artificial neurons and processes i... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_37 | # Frank Stephan: Covering the Recursive Sets
Invitation to the Logic Seminar at the National University of Singapore
Date: Wednesday, 14 October 2015, 17:00 hrs
Room: S17#04-06, Department of Mathematics, NUS
Speaker: Frank Stephan
Title: Covering the Recursive Sets
URL: http://www.comp.nus.edu.sg/~fstephan/logic... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_38 | # $G_{\infty}$ (also known as $E_2$)-operad in terms of trees
It's well known that the $$A_{\infty}$$ and $$L_{\infty}$$ operads, being resolutions of the associative and Lie operads, admit descriptions as free operads of certain trees.
The description I am referring to for the $$A_{\infty}$$ operad is described in V... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_40 | # INTRODUCTION TO YANGIAN SYMMETRY IN INTEGRABLE FIELD THEORY
@article{Mackay2004INTRODUCTIONTY,
title={INTRODUCTION TO YANGIAN SYMMETRY IN INTEGRABLE FIELD THEORY},
author={Niall J. Mackay},
journal={International Journal of Modern Physics A},
year={2004},
volume={20},
pages={7189-7217}
}
• N. Mackay
• Published 17 S... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_43 | # Thread: Algebra problem
1. ## Algebra problem
A computer expert can do a job in 6 hours. His secretary can do the same job in 7hrs. After the expert works on the job foe 2 hours, his secretary takes it and complete the job. How many hrs did it take her to complete the job?
after 2hrs the experthad completed 1/3 of... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2032 | Principal Ideals in Integral Domain
Jump to navigation Jump to search
Theorem
Let $\struct {D, +, \circ}$ be an integral domain.
Let $U_D$ be the group of units of $D$.
Let $\ideal x$ be the principal ideal of $D$ generated by $x$.
Let $x, y \in \struct {D, +, \circ}$.
Then:
Element in Integral Domain is Diviso... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2034 | # Show that cube of any positive integer is of the form $4m, 4m + 1$ or $4m + 3$, for some integer $m$.
#### Complete Python Prime Pack
9 Courses 2 eBooks
#### Artificial Intelligence & Machine Learning Prime Pack
6 Courses 1 eBooks
#### Java Prime Pack
9 Courses 2 eBooks
Given:
Positive integer $m$... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2035 | Basic Terms and Definitions
notes
A line with two end points is called a line-segment and a part of a line with one end point is called a ray. Note that the line segment AB is denoted by bar (AB) . The ray AB is denoted by vec (AB) , and a linbe is denoted by AB. However, we will not use these symbols, and will deno... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2036 | # What will come in the place of question mark (?) in the following question?$$? = \sqrt[5]{{{{\left( {243} \right)}^2}}}$$
1. 3
2. 7
3. 6
4. 8
5. 9
## Answer (Detailed Solution Below)
Option 5 : 9
Free
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1.6 Lakh Users
80 Questions 80 Marks 45 Mins
## Detailed Solutio... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2038 | » » » The average gradient of the rail line from the centre of Zafi to the bridge over...
# The average gradient of the rail line from the centre of Zafi to the bridge over...
### Question
The average gradient of the rail line from the centre of Zafi to the bridge over River Saga is approximately
A)
1:68
B)
1:65
C)... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2039 | ## How do you say that tree rings (are - will be) closer if there isn't much rain [in a year]?
5
Which of these sentences is true?
• If there is not much rain in a year, the rings in a tree are close together OR
• If there is not much rain in a year, the rings in a tree will be close together
If I removed "in a yea... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2041 | ## The Maximum Duration of Constant Consumption
At what rate should an essential non-renewable resource be depleted to sustain an economy for as long as possible?
Suppose the inputs of a closed economy consist of produced capital, a non-renewable resource and labour . Output is of a single good which can be either c... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2042 | ### Home > CALC > Chapter 6 > Lesson 6.5.1 > Problem6-170
6-170.
Use Newton's Method to calculate the x-intercept of the function y = 1 − ln(2x), correct to 5 decimal places. Homework Help ✎ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2043 | "All displacement vectors are bound ones. They are bound to those points whose displacement they represent. Free vectors are usually those representing global physical parameters, e. g. vector of angular velocity ω for Earth rotation about its axis." "Let v be the value of function $$\vec{v} = \vec{v} (t, P)$$ at the p... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2044 | During AMC testing, the AoPS Wiki is in read-only mode. No edits can be made.
# Difference between revisions of "1991 AHSME Problems/Problem 22"
## Problem
$[asy] draw(circle((0,6sqrt(2)),2sqrt(2)),black+linewidth(.75)); draw(circle((0,3sqrt(2)),sqrt(2)),black+linewidth(.75)); draw((-8/3,16sqrt(2)/3)--(-4/3,8sqrt(2)... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2045 | ## 15.49
$K = \frac{k_{forward}}{k_{reverse}}$
Moderators: Chem_Mod, Chem_Admin
soniatripathy
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am
### 15.49
I am confused on how intermediates play a part in rate laws. I thought that intermediates cannot be included in rate laws? If so, why is HoBr included in the rate law f... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2047 | # I Finite square well
1. Mar 19, 2017
### LagrangeEuler
I am not sure how is it possible that asymetric potential well does not have bond states if $E<U_1<U_2$. In symmetric case solution always exists. Why this is a case?
2. Mar 19, 2017
### Staff: Mentor
I may be misunderstanding the question here.... The asym... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2033 | # Math
1.Which solid has one base that is a triangle and three lateral surfaces that are triangles?
A:Triangular Pyramid***
B:Triangular Prism
C:Rectangular Prism
D:Rectangular Pyramid
2.A solid with two parallel and congruent bases cannot be which of the following:
A:Cone***
B:Prism
C:Cylinder
D:Cube
3.A cone has ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2037 | # naths
What is the equation of the line which has gradient 2, and passes through midpoint of (3,4) and (5,6)
1. 👍 0
2. 👎 0
3. 👁 208
1. midpoint is (4,5)
y - 5 = 2(x-4)
arrange it any way you have to
1. 👍 0
2. 👎 0
## Similar Questions
1. ### Algebra A (1510)
The "perpendicular bisector" of the line segment... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2040 | # Wrong condition for the convergence of the integral $\int_0^\infty t^a \exp(-i t^b) dt$
The integral $\int_0^\infty t^a \exp(-i t^b) dt$ converges for $-1 < a < b - 1$ or $b - 1 < a < -1$.
However,
Assuming[Element[a, Reals] && Element[b, Reals],Integrate[t^a Exp[I t^(-b)], {t, 0, Infinity}]]
gives
$\text{Condi... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2046 | BREAKING NEWS
Constructive function theory
## Summary
In mathematical analysis, constructive function theory is a field which studies the connection between the smoothness of a function and its degree of approximation.[1][2] It is closely related to approximation theory. The term was coined by Sergei Bernstein.
## E... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15040 | Home OALib Journal OALib PrePrints Submit Ranking News My Lib FAQ About Us Follow Us+
Title Keywords Abstract Author All
Search Results: 1 - 10 of 100 matches for " "
Page 1 /100 Display every page 5 10 20 Item
Christina Chen Mathematics , 2012, Abstract: Define a body A to be able to hide behind a body B if the ort... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15043 | Clu Linear Algebra Ch 1 S1 Examples
## Example Question
Solve each system by using elementary row operations on the equations or on the augmented matrix
(1)
\begin{matrix} x_1+5(x_2)=7 \end{matrix}
(2)
\begin{matrix} -2(x_1)-7(x_2)=-5 \end{matrix}
The matrix
(3)
\begin{matrix} 1 & 5 & | & 7 \\ -2 & -7 & | & -5 \\ ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15044 | # Thread: Series: Reasoning Test
1. ## Series: Ratio Test
What are the conditions of the test of reason does not apply to a series ?
2. I have no idea at all what you mean by "test of reason"!
Is this a language problem? Do you mean "ratio test"?
(Hey, makes sense- ratio- rational- reason!)
The ratio test for con... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15045 | ### Home > GC > Chapter 1 > Lesson 1.2.3 > Problem1-76
1-76.
On graph paper, graph the line through the point $(0, −2)$ with slope $\frac { 4 } { 3 }$.
1. Write the equation of the line.
$y=\frac{4}{3}x-2$
2. Translate the graph of the line up $4$ and to the right $3$ units. What is the result? Write the equation ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15046 | # A parallelogram has sides A, B, C, and D. Sides A and B have a length of 3 and
###### Question:
A parallelogram has sides A, B, C, and D. Sides A and B have a length of 3 and sides C and D have a length of 4 . If the angle between sides A and C is (7 pi)/18 , what is the area of the parallelogram?
#### Similar ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15047 | Article Contents
Article Contents
First-order entropies for the Derrida-Lebowitz-Speer-Spohn equation
• A logarithmic fourth-order parabolic equation in one space dimension with periodic boundary conditions is analyzed. Using a new semi-discrete approximation in time, a first-order entropy–entropy dissipation inequal... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15049 | Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
QUESTION
What would the nuclear equation be for the beta-decay of strontium-90?
Here's what I got.
Strontium-90, ""^90"Sr", undergoes beta minus decay, so your goal here will be to use what you know abou... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15050 | # Redemption: Part I
Back in my last post, I closed with a problem (The Redeemer) from the International Math Olympiad of 1997. Unlike the problem I posted from 1981 (Elementary, my dear Watson), I was actually walking by the time I met The Redeemer. In fact, I was in Mar del Plata, a beautiful seaside beach resort in... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15051 | # Difference between revisions of "2009 AMC 8 Problems/Problem 21"
## Problem
Andy and Bethany have a rectangular array of numbers with $40$ rows and $75$ columns. Andy adds the numbers in each row. The average of his $40$ sums is $A$. Bethany adds the numbers in each column. The average of her $75$ sums is $B$. What... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15052 | # Hon v ll få Sver ge att - Tandläkartidningen
Forskning vid Uppsala universitet - Uppsala universitet
15 kr. Slutsåld. Sajter elements of the second period from boron to oxygen form compounds ion con- centrations at a particular time, two will be joined with a double bond, acid, Linus Pauling pro- posed the theory o... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15053 | • To Do Lessons
Mathematics » Introducing Decimals » Ratios and Rate
Finding Unit Rates
This is a lesson from the tutorial, Introducing Decimals and we encourage you to log in or register before you continue, so that you can track your progress.
Finding Unit Rates
In the last example, we calculated that Bob was dr... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15054 | ## Third update of aggregate notes for phy1520, Graduate Quantum Mechanics.
I’ve posted a third update of my aggregate notes for PHY1520H Graduate Quantum Mechanics, taught by Prof. Arun Paramekanti. In addition to what was noted previously, this contains lecture notes up to lecture 13, my solutions for the third prob... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15055 | # Scheme-theoretically dense and associated points.
(Vakil 5.5.4) An open subscheme U of a scheme X is said to be scheme-theoretically dense if any function on any open set V is $0$ if it restricts to $0$ on $U \cap V$. If $X$ is locally Noetherian, then you can use the injection (5.5.3.1) (with $M = A$) to show that ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15048 | # Is the following function convex-\cap? How to maximize it?
This question got no answer or comments on Math Stackexchange:
Let $p=(p_1,\ldots,p_n)$ be a given nondegenerate (i.e., all $p_i> 0$) probability distribution on $n$ points. Define the following function $$\Phi(b_1,\ldots,b_n)=\frac{\left(\sum_{k=1}^n b_k \... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15041 | # How do you write the equation for a circle with center at (-1, -3) and a radius of 6?
May 10, 2016
${\left(x + 1\right)}^{2} + {\left(y + 3\right)}^{2} = 36$
The general equation for a circle is ${\left(x - h\right)}^{2} + {\left(y - k\right)}^{2} = {r}^{2}$ where the centre if the circle is $\left(h , k\right)$ an... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_15042 | Larry Riddle, Agnes Scott College
### Taylor series for $$f_\theta (r)$$ near r = 0 (for top part of tree)
Recall that $$f_\theta (r) = y_k - y_0$$ where y0 is the y-coordinate of the branch tip for the path (LR) and yk is the y-coordinate of the branch tip for the path Rk(LR), where k is the smallest integer such th... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14144 | # The critical random barrier for the survival of branching random walk with absorption
Abstract : We study a branching random walk on $\mathbb{R}$ with an absorbing barrier. The position of the barrier depends on the generation. In each generation, only the individuals born below the barrier survive and reproduce. Gi... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14145 | # Regression
It sometimes happens that we have only limited access to direct measurements of some variable of interest, but we have abundant data on some other, related variable. In such cases we can use the “other” variable as a proxy for our target variable. We attempt to determine the relationship between them, the... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14146 | # Vector Equation
I need some help with this problem can anyone give the solution and the formula needed / ways please ? I am stuck with this problem
(a) Find the vector equation for the plane containing the points $$(x, y, z) = (1, −2, 3)$$ and is parallel to the vectors $$u = i + 2k$$ and $$v = 3i + j + k$$. Then f... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14147 | Share
# Calculate the Mean, Variance and Standard Deviation of the Following Frequency Distribution. Class:1–1010–2020–3030–4040–5050–60frequency:112918453 - Mathematics
ConceptVariance and Standard Deviation Standard Deviation of a Discrete Frequency Distribution
#### Question
Calculate the mean, variance and stan... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14148 | ## e, f, and the remainder theoremSeptember 12, 2009
Posted by Akhil Mathew in algebra, algebraic number theory, commutative algebra, number theory.
Tags: , ,
1 comment so far
So, now to the next topic in introductory algebraic number theory: ramification. This is a measure of how primes “split.” (No, definitely wro... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14149 | Prompt Cards
These two group activities use mathematical reasoning - one is numerical, one geometric.
Consecutive Numbers
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Exploring Wild & Wonderful Number Patterns
EWWNP means Exploring Wild and Wonde... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14150 | # In modal logic, why are models ordered sets?
I just started undergrad math, so I only have a fuzzy idea of what a model is. I'm learning about modal logic in one of my classes. Our text describes modal logic as operating in a model defined as an ordered set < W, R, v> (correct me if I'm wrong), such that W is the se... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14151 | # zbMATH — the first resource for mathematics
On real forms of a complex algebraic curve. (English) Zbl 0992.14011
The authors consider the number of real forms of a complex algebraic curve $$X$$, i.e. the number of those non-isomorphic real algebraic curves whose complexifications are isomorphic to $$X$$. Let $$g\geq... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14152 | # A group isomorphic to its automorphism group
We consider a group $$G$$ and we look at its automorphism group $$\text{Aut}(G)$$. Can $$G$$ be isomorphic to
$$\text{Aut}(G)$$?
The answer is positive and we’ll prove that it is the case for the symmetric group $$S_3$$.
Consider the morphism $\begin{array}{l|rcl} \Phi :... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14154 | ## Isomorphismes entre espaces $$H_ 1$$.(French)Zbl 0509.46045
### MSC:
46J15 Banach algebras of differentiable or analytic functions, $$H^p$$-spaces 60G46 Martingales and classical analysis 46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces
### Keywords:
Hardy space; m... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14155 | Want to see correct answers?
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# Sixth Grade (Grade 6) Algebraic Expressions Questions
You can create printable tests and worksheets from these Grad... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14156 | ## One-way function is not injective when it is in NP
Let us $$\Sigma = \{0,1\}$$ and $$f: \Sigma^* \rightarrow \Sigma^* \in FP$$ for which is valid that $$\exists k: \forall x \in \Sigma^* : \lvert x \rvert ^ {1/k} \leq \lvert f(x) \rvert \leq \lvert x \rvert ^ k$$. Thus, we can say that the function $$f$$ is one-way... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14157 | Get Free NCERT Solutions for Class 10 Maths Chapter 6 Ex 6.1 PDF. Triangles Class 10 Maths NCERT Solutions are extremely helpful while doing your homework. Exercise 6.1 Class 10 Maths NCERT Solutions were prepared by Experienced LearnCBSE.in Teachers. Detailed answers of all the questions in Chapter 6 Maths Class 10 Tr... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14158 | # Math Help - Normal distribution question involving samples
1. ## Normal distribution question involving samples
Q: The mass of coffee in a randomly chosen jar sold by a certain company may be taken to have a normal distribution with mean 203g and standard deviation 2.5g. The random variable C denotes the mean mass ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14159 | # Cube Root of 343
The cube root of 343 is the number, which multiplied by itself three times, is 343. In other words, the cube of this number equals three hundred and forty-three. If you have been looking for cube root of three hundred and forty-three, then you are right here, too. On this page we also show you what ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_14153 | # Thread: Percentage Error calculation: what denominator to use for forecasting
1. ## Percentage Error calculation: what denominator to use for forecasting
Hi, please can someone advise what denominator i should use when calculating percentage error for forecasting purposes. Do I use forecast value or actual value. I... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2145 | # Find all continuous functions $f:\mathbb{R}\to\mathbb{R}$, that satisfy $f(xy)=f(\frac{x^2+y^2}{2})+(x-y)^2$
Find all continuous functions $f:\mathbb{R}\to\mathbb{R}$, that satisfy $f(xy)=f(\frac{x^2+y^2}{2})+(x-y)^2$
-
"Welcome to math.SE: since you are new, I wanted to let you know a few things about the site. Ti... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2146 | ## A Christmas Theorem
at 8:01 p.m. on 22. December, 2013
Theorem. Santa Claus exists.
Proof. Let be the sentence "If then Santa Claus exists." This looks a bit self-referential but actually such a sentence, or an equivalent one, is constructible by the Diagonalisation Lemma.
Now, is of the form where (the antecede... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2147 | # Problem with inelastic collision
1. Mar 22, 2014
### ShayanJ
Two masses $m_1$ and $m_2$ are closing each other with speeds $v_1$ and $v_2$. The coefficient of restitution is e. Calculate the amount of kinetic energy loss after caused by the collision.
I solved it in the center of mass coordinates($v_{cm}=u_{cm}=0$... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2148 | # j-james/math
All my math notes, now in Markdown.
View the Project on GitHub j-james/math
# Series
## Learning Targets
You should be able to
• Find Sums
• Write a series in summation / sigma notation
## Concepts / Definitions
A series is the sum of the terms of a sequence. A series can also be represented by u... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2149 | ## Sunday, April 22, 2012
### How do we find the Volume of pyramids and cones?
To find the volume of a pyramid ;
V= (1/3)B*H
Volume of a cone ;
V=(1/3) πr²h OR V= (1/3)BH
### How do you find the Surface Area and Volume of a sphere?
To find the Surface Area of a sphere you would have to use this formula ; $\!A... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2151 | Rate of change of volume of a rectangular box
1. Dec 9, 2012
wahaj
1. The problem statement, all variables and given/known data
How fast is the volume of a rectangular box changing when the length = 6 cm, width = 5 cm and depth = 4 cm and the length and height are increasing at a rate of 1 cm/s and width is decreas... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2152 | # The signage of a displacement vector?
Well, on my homework I had these two questions, but got a bit confused about what they are asking, and whether my answer is right or not.
1. What is the sign of the displacement if you are moving away from the origin?
2. What is the sign of the displacement if you are moving to... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2153 | # What is the length of side BC of the triangle? Explain how you arrived at your answer.
Dec 27, 2016
$B C = 28$
#### Explanation:
By the image, $A C = A B$, meaning $2 x + 7 = 4 x - 7$. Solving for $x$, we get
$2 x + 7 = 4 x - 7$
$\implies 2 x = 14$
$\implies x = 7$
Thus $B C = 4 x = 4 \left(7\right) = 28$ |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2155 | # How do you find the coordinates of the other endpoint of a segment with the given endpoint is K(5,1) and the midpoint is M(1,4)?
May 23, 2018
See a solution process below:
#### Explanation:
The formula to find the mid-point of a line segment give the two end points is:
$M = \left(\frac{\textcolor{red}{{x}_{1}} +... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2156 | # What does the derivative of velocity with respect to position mean?
According to a Physics book, for a particle undergoing motion in one dimension (like a ball in free fall) it follows that
$$\frac{dv}{ds} = \frac{dv}{dt} \frac{dt}{ds} = \frac{a}{v},$$
where $v$ is the velocity and $s$ is the position of the parti... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2157 | Sharon G.
# how to write a two column proof, proving corollary 4.4
learning about two column proofs and triangles |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2158 | # RMO 2015!! #2
Find the 10-digit positive integer satisfying :
1st digit denotes the number of 0's
2nd digit denotes the number of 1's
3rd digit denotes the number of 2's
...
10th digit denotes the number of 9's
× |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2144 | # Differential forms problem
1. Dec 9, 2009
### Fredrik
Staff Emeritus
Introduction to smooth manifolds, by John Lee, page 304. The right-hand side of (c) near the top of the page has a factor $\omega_I\circ F$. I've been doing the calculation over and over for hours now and I keep getting just $\omega_I$. Is that F... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2154 | # Encyclopedia Magnetica
### Site Tools
magnetic_monopole
# Magnetic monopole
Stan Zurek, Magnetic monopole, Encyclopedia Magnetica, E-Magnetica.pl
Magnetic monopole - a hypothetical entity proposed on the basis of theoretical calculations, and duality to electric monopoles.
* Helpful page? Support us! → All we... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2159 | # What is the “standard balls-in-boxes” argument?
I came across a question recently that I did not know how to do. It included a solution, and basically the question boiled down to how many positive integers are there with 10 or less digits such that the sum of its digits is equal to 9? The solution then finished by s... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_2150 | MathSciNet bibliographic data MR1913897 (2003g:11056) 11F85 (11F33) Schmidt, Ralf Some remarks on local newforms for $\rm GL(2)$$\rm GL(2)$. J. Ramanujan Math. Soc. 17 (2002), no. 2, 115–147. Links to the journal or article are not yet available
For users without a MathSciNet license , Relay Station allows linking fro... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18816 | # Angle between two orthogonal coordinate systems
1. Jun 23, 2014
### fannyfanfanz
If two orthogonal coordinate systems (xyz and x'y'z') share a common origin, and the angles between x and x', y and y', and z and z' are known. What is angle between the projection of z' on the xy plane and the x axis?
2. Jun 24, 201... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18817 | # quadrature formula for a lune
I have been reading about quadrature formulas in the complex plane.
On the set $\mathbb{D} = \{|z| < 1\}$ we have $\int_{\mathbb{D}} f(z) dA = \pi f(0)$. Standard result in Harmonic functions.
The sample paper shows for the limaçon, $\Omega = \{ z + \frac{1}{2}z^2: |z| < 1\}$ we have ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18818 | Find all School-related info fast with the new School-Specific MBA Forum
It is currently 10 Oct 2015, 13:08
### 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.
C... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18820 | # Discrete Math ( space ) Relations
What could be the domain name and variety of the subsequent relation? Example:
In a list of all real amounts this regard “is the same to” is surely an equivalence relation for a О 3rd r, the Implies a, t Means the suggests b Implies a new as well as a Is equal to n, m Is equal to c ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18824 | Under the auspices of the Computational Complexity Foundation (CCF)
REPORTS > KEYWORD > S_2^P:
Reports tagged with S_2^p:
TR04-001 | 11th December 2003
Lance Fortnow, Russell Impagliazzo, Chris Umans
#### On the complexity of succinct zero-sum games
We study the complexity of solving succinct zero-sum games,
i.e., t... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18825 | # Motion of masses connected by a string over a pulley
I am really sorry for late reply.
Let me try again:
(iv)
The two particles will experience same impulses.
Impulse A = m . Δva = $$m . (-v + \sqrt{\frac{2gh}{3}} )$$
Impulse B = 2m . Δvb = 2m . (v - 0)
Equating them:
$$m . (-v + \sqrt{\frac{2gh}{3}} ) = 2mv$$
$... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18826 | # Understanding $X \to X^{tt}$ from the Poincare bundle
Let $X$ be an abelian variety over $k$, $X^t = \text{Pic} _{X/k}^0$ its dual, and $\mathscr{P}$ be the Poincare bundle on $X \times X^t$.
View $\mathscr{P}$ as a family of line bundles on $X^t$ parameterized by $X$. This gives a morphism $\kappa : X \to X^{tt}$
... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18827 | # Undetermined Coeff.
1. Oct 6, 2008
### Unassuming
1. The problem statement, all variables and given/known data
(I am using b, for beta)
Let
$$f(t)=ce^{-\beta t}$$
with b a fixed number and c in R is arbitrary but given.
Write the general solution of
$$x'=-x+f(t)=-x+ce^{-\beta t}$$
Hint: Use undetermined coe... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18828 | Browse Questions
# If the lines $\large\frac{x-1} {-3} = \frac{y-2}{2k} = \frac{z-3}{2}$ and $\large\frac{x-1}{3k} = \frac{y-1}{1} = \frac{z-6}{-5}$ are perpendicular, find the value of $k$.
$\begin{array}{1 1} k = \large\frac{-10}{7} \\ k = \large\frac{10}{7} \\ k = \large\frac{-7}{10} \\ k = \large\frac{7}{10}\end{... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18829 | # maximum of a sequence of i.i.d. random variables
Let $X_i,i=1,2,...,$ be a sequence of i.i.d. random variables and $u_n$ be a sequence of positive real numbers. I was motivated by the fact that if
$$P(\max_{1\leq i\leq n}|X_i|\geq u_n)\to 0 \quad \text{as}\quad n\to\infty.$$
then
$$P(\max_{1\leq i\leq n}|X_i|\geq... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18830 | # Isomorphism between exterior algebras
Let V is a m-dimensional vector space and $$V^{*}$$ is dual vector space. How can define isomorphism between exterior algebra $$Λ(V)$$ and exterior algebra $$Λ(V^{*})$$ with use a volume element $$f\in Λ^{m}(V)$$?
• What are your thoughts on this? – giobrach May 31 at 16:03
• I... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18831 | # What is the difference between numerator and denominator?
The sum of the numerator and denominator of a positive fraction is 11. If 2 is added to both numerator and denominator, the fraction is increased by 1/24. What is the difference between the numerator and denominator of the fraction?
Do we have any shortcuts ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18819 | # Find the Determinant [[7,1,0],[7,-7,1],[6,-1,0]]
Set up the determinant by breaking it into smaller components.
Since the matrix is multiplied by , the determinant is .
The determinant of is .
The determinant of a matrix can be found using the formula .
Simplify the determinant.
Simplify each term.
Multiply by .
Mul... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18821 | # Equation involving difference of beta CDFs
Consider the expression $$I_{p}(\alpha,\beta+1) - I_{p}(\alpha+1,\beta) = c$$ where $$I_p(a,b)$$ is the regularized incomplete beta function.
Question: Given $$\alpha,\beta,$$ and $$c>0$$, what is $$p$$?
Attempt: I need to invert the CDF's, but the problem is the argument... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18823 | # Use SPSS to answer the following questions. (Hint: For instructions use the SPSS Instruction Manual posted...
###### Question:
Use SPSS to answer the following questions. (Hint: For instructions use the SPSS Instruction Manual posted to the module as a reference for all SPSS output). Paste all SPSS output into the ... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_18822 | # Use polynomial division to completely factor y=x^3+3x^2-13x-15by x+5a. y=(x+5)(x-3)(x-1)b. y=(x+5)(x-3)(x+1)c. y=(x+5)(x+3)(x+1)
###### Question:
Use polynomial division to completely factor y=x^3+3x^2-13x-15 by x+5 a. y=(x+5)(x-3)(x-1) b. y=(x+5)(x-3)(x+1) c. y=(x+5)(x+3)(x+1)
#### Similar Solved Questions
#####... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22512 | Integrable dynamical systems obtained by duplication
Annales de l'I.H.P. Physique théorique, Volume 57 (1992) no. 2, pp. 167-181.
@article{AIHPA_1992__57_2_167_0,
author = {Calogero, F. and Fran\c{c}oise, J.-P.},
title = {Integrable dynamical systems obtained by duplication},
journal = {Annales de l'I.H.P. Physique th\... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22514 | # Most efficient way to identify a circle
#### rashtastic
##### New member
A friend's hw problem (Prove any five points in the plane determines a possibly degenerate conic section) led us to a different problem that we found more interesting.
We can identify a circle with three points on the circle, or six parameter... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22516 | # 17.4 Dynamic tables
## 17.4-1
Suppose that we wish to implement a dynamic, open-address hash table. Why might we consider the table to be full when its load factor reaches some value $\alpha$ that is strictly less than $1$? Describe briefly how to make insertion into a dynamic, open-address hash table run in such a... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22517 | The value of the integral ∫01/2 1+3(x+1)2(1−x)61/4dx is__.
# The value of the integral ${\int }_{0}^{1/2} \frac{1+\sqrt{3}}{{\left(\left(x+1{\right)}^{2}\left(1-x{\right)}^{6}\right)}^{1/4}}dx$ is__.
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### Solution:
$\begin{array}{c}I=... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22519 | +0
# Find the length of an arc on a circle of radius 8 corresponding to an angle of (90/π)∘.
0
41
2
+106
Find the length of an arc on a circle of radius 8 corresponding to an angle of (90/π)∘
I keep getting the answer of 229.12 but it asks me to enter it as a fraction
Nov 5, 2019
#1
+105919
+2
Find the length of... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22520 | • Definition for "fourth dimension"
• Time seen as a coordinate measurement and required…
• Sentence for "fourth dimension"
• It is truly inane to travel…
• Quotes for "fourth dimension"
• "As we divest ourselves of once…"
• Hypernym for "fourth dimension"
• dimension
• Etymologically Related for "fourth dimension"
• f... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22521 | ## Pythagorus Theorem
For right-angled triangles, the Pythagorus Theorem lets us calculate a side length from any of the other two.
The Pythagorus Theorem is:
$a^2 + b^2 = c^2$
In the case of the 3, 4, 5 triangle (see previous section), then:
$3^2 + 4^2 = 5^2$
$9 + 16 = 25$
If we’re missing a side length, then w... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22522 | # Chapter 4 Box Problems
## Box A
### Problem b
Variable Definition
s.j.x.ij $\Sigma {jx}_{ij}$
n.i $n_i$
x.bar.i $\bar{x}_i$
n.i.2 $n_i^2$
WSS $\Sigma_j(x_{ij}-\bar{x}_{i.})^2$
WSS $\Sigma_j(x_{ij}-\bar{x}_{i.j})^{2}$
$\Sigma_j(x_{ij})$
grand.mean $\bar{x}_{..}$
delta.2 $(\bar{x}_i - \bar{x}_{..} )^{2}$
BSS $n_i(\b... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22523 | # Solve for X in the graph and matrix below
The following picture shows a graph, $G$, with vertices $V = {A, B, C, D, E}$ with edge set $E$. Some edge weights are shown, and others are not.
Also below is the resulting matrix $D$ from the Floyd-Warshall algorithm. In this matrix, $D[i][j]$ shows the distance between v... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22525 | # American Institute of Mathematical Sciences
April 2019, 12(2): 323-346. doi: 10.3934/krm.2019014
## On a Boltzmann equation for Haldane statistics
1 Mathematical Sciences, 41296 Göteborg, Sweden 2 Aix-Marseille University, CNRS, Centrale Marseille, I2M UMR 7373, 13453 Marseille, France
Received January 2018 Re... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22526 | # Evaluate integral of 2/(x^2-1) with respect to x
Since is constant with respect to , move out of the integral.
Factor the numerator and denominator of .
Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Write the fraction using partial fraction decompositi... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22527 | # wave-particle duality
I have been trying to understand "wave-particle duality" and other cases related to it. I am currently a college level student. I have few question which I am not getting answers clearly.
In double slit experiment, A particle behave like a wave, then how is "wave-particle duality" explained? I... |
MathCode-Pile_decontaminated_orig_math-related_devided_processed_train-00003-of-00114-e7fc257ef044bc03_doc_22513 | # Asymptotic behavior of the fundamental solution of Laplace's equations
Consider the fundamental solution of Laplace's equation: $$\Phi(x,y):= \begin{cases} \frac{1}{2\pi}\ln\frac{1}{|x-y|},\quad x,y\in{\mathbb R}^2\\ \frac{1}{4\pi}\frac{1}{|x-y|},\quad x,y\in{\mathbb R}^3. \end{cases}$$ Let $D\subset{\mathbb R^m} (m... |
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