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# Messy
You are fed up with your messy room, so you decided to clean it up.
Your room is a bracket sequence $s=s_{1}s_{2}\dots s_{n}$ of length $n$. Each character of this string is either an opening bracket ‘(‘ or a closing bracket ‘)’.
In one operation you can choose any consecutive substring of $s$ and reverse it... | {} |
# Convex not strictly convex!
Update:
Linear programming problems (LP) have a convex space, precisely vector space, such as a convex feasible region as pointed out by @prubin. Also, they may have either unique or multiple solutions. (there are already other types).
On the other hand, there is still a concept named s... | {} |
### Supervised Neural Networks for RFI Flagging
#### Abstract
Neural network (NN) based methods are applied to the detection of radio frequency interference (RFI) in post-correlation, post-calibration time/frequency data. While calibration does affect RFI for the sake of this work a reduced dataset in post-calibratio... | {} |
# Special relativity particle creation
A photon hits a proton that is at rest (In the lab system) which creates a pion, so now there are only the proton and pion. The question is what minimal energy can you give a photon such that this reaction is possible?
I tried using conservation of energy and momentum however th... | {} |
# Areas Inside a Rectangle
Geometry Level 4
$$ABCD$$ is a rectangle with point $$E$$ on line segment $$AB$$ and point $$F$$ on line segment $$BC$$ such that $$[ADE] = 7$$, $$[BEF] = 11$$ and $$[DCF] = 9$$. Then $$[DEF] = a\sqrt{b}$$, where $$a$$ and $$b$$ are integers and $$b$$ is not a multiple of the square of any ... | {} |
# Thread: Rings- a^2 = a then R must be commutative
1. ## Rings- a^2 = a then R must be commutative
Hi, just need a hint with this one...
Let R be a ring such that a^2 = a for every a in R. Show that R must be commutative
Oh and also having some trouble with...
Show that $\bb{Z}_{n}$ is a field if and only if n is... | {} |
# Monitoring of the thermal neutron flux in the LSM underground laboratory
3 CSNSM INSTR
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
5 CSNSM PS1
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière, CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract... | {} |
# How are problems classified in Complexity Theory?
I'm reading Sipser's Introduction to the Theory of Computation (3rd edition). In chapter 0 (pg. 2), he says we don't know the answer to "what makes some problems computationally hard and others easy," however, he then states that "researchers have discovered an elega... | {} |
| | | |
## Characterizations of Curves According to Frenet Frame in Euclidean 3-Space
#### Osman Çakır [1] , Süleyman Şenyurt [2]
##### 25 42
In this paper, we investigate the conditions of being an harmonic curve and research differential equations characterizing any differentiable curve in Euclidean 3-space. By m... | {} |
The University of Southampton
University of Southampton Institutional Repository
# Complements versus substitutes and trends in fertility choice in dynastic models
Jones, Larry E. and Schoonbroodt, Alice (2010) Complements versus substitutes and trends in fertility choice in dynastic models International Economic Rev... | {} |
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Kalecgos
How can we computationally account for anisotropic reflections? I suppose this would just mean a BRDF which is not uniform with respect to the surface orientation (in the way that Matt described in class, e.g. rotating the surface around its normal... | {} |
# Latex: Add Image Above the Title
I have an Image, and I would like to add the image above the Title. The Downbelow Code gives the entire page to the Image. I want the image and the Title, Autother to be displayed on the same page
\includegraphics[width=0.1\textwidth]{images/Company_Groups.jpg}~\\[1cm]
\title{xxxxxx... | {} |
# Potential Function Chasing - Rotation
This topic is 4463 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.
## Recommended Posts
Hi. I am attempting to use Lenard-Jones potential function to do chasing/obstacle avoidance AI for a space game. The potential functions... | {} |
# Math Help - trigonometry equationsss =(
1. ## trigonometry equationsss =(
hii guyz, i would REALLY like some help for these trig equation questions
thank you sooo much if you can helpp me !
if secx - tanx = 3/5, show that sinx = 8/17
if tanx = t, express sin2x and cos2x in terms of t. Find the values for t for wh... | {} |
# Coin Flips and Hypothesis Tests
Here's a problem I thought of that I don't know how to approach:
You have a fair coin that you keep on flipping. After every flip, you perform a hypothesis test based on all coin flips thus far, with significance level $\alpha$, where your null hypothesis is that the coin is fair and... | {} |
The internet document class takes a different approach to the other programmes we’ve used so far. It is a LaTeX document class used with
\documentclass[<options>]{internet}
<options> can specify an output format like xhtml or epub or markdown amongst others. The document is then compiled to pdf, and text is extracte... | {} |
NPartitionPairs() calculates the number of terminal arrangements matching a specified configuration of two splits.
NPartitionPairs(configuration)
## Arguments
configuration
Integer vector of length four specifying the number of terminals that occur in both (1) splits A1 and A2; (2) splits A1 and B2; (3) splits B1 a... | {} |
# gcd_array¶
tenpy.tools.math.gcd_array(a)[source]
Return the greatest common divisor of all of entries in a | {} |
# The Coordinates of a Point on X-axis Which Lies on the Perpendicular Bisector of the Line Segment Joining the Points (7, 6) and (−3, 4) Are - Mathematics
MCQ
The coordinates of a point on x-axis which lies on the perpendicular bisector of the line segment joining the points (7, 6) and (−3, 4) are
• (0, 2)
• (3, ... | {} |
Question
# In an A.P if the $12^{th}$ term is -13 and the sum of its first four terms is 24. Find the sum of its first ten terms.
Hint: Assume an A.P series with ‘a’ as its first term and the difference between the consecutive terms be ‘d’. Our $12^{th}$ term of the A.P is -13. So, we can write it in mathematical for... | {} |
# Conformal map in 3D
I'm looking for a method to transform a three dimensional geometry. This geometry has a rotational symmetry, so the $r$- and $z$-coordinates are all the same over $\phi$. I want to transform this cylindrical geometry in a linear geometry (something like $z\rightarrow x$, $r\rightarrow y$ and $\ph... | {} |
# TeXlive 2016 error with literat (Literaturnaya) font
It is so strange that no questions on the whole website are dedicated to the Literaturnaya font (despite its frequent use in Russian documents 10 years ago or so), and only two questions reference it!
On a system with a freshly installed and updated TeXLive 2016,... | {} |
# Prove $f(z)=\int_{[0,1]}\frac{1}{1-wz}dw$ is holomorphic in the open unit disk.
Define $f:D[0,1] \rightarrow \mathbb C$ through $$f(z)=\int_{[0,1]}\frac{1}{1-wz}dw$$ The integration path is from 0 to 1 along the real line.
Prove that $f$ is holomorphic in the open unit disk $D[0,1]$.
I was trying to use the Cauchy... | {} |
# Angular Velocity/Spinning Disk
1. Jun 16, 2012
### SalsaOnMyTaco
1. The problem statement, all variables and given/known data
Ive been working on this two last questions and I cant seem to get the right set up.
A disk with a diameter of 0.04 m is spinning with a constant velocity about an axle perpendicular to th... | {} |
# All Questions
19 views
### A condition where a person doesn't feel pain
Congenital insensitivity to pain is a rare condition where a person cannot feel pain (physical). Is there any condition relates to emotional pain or any pain not related to physical that a person ...
23 views
### Was the anthropological “Negr... | {} |
Last edited by Tuktilar
Sunday, May 3, 2020 | History
3 edition of Cosmological constant and the evolution of the universe found in the catalog.
# Cosmological constant and the evolution of the universe
## by RESCEU International Symposium (1st 1995 Tokyo, Japan)
• 210 Want to read
• 24 Currently reading
Published... | {} |
Nonlinear ODEs with stable limit cycles
It’s not obvious when a nonlinear differential equation will have a periodic solution, or asymptotically approach a periodic solution. But there are theorems that give sufficient conditions. This post is about one such theorem.
Consider the equation
x” + f(x) x‘ + g(x) = 0
wh... | {} |
# Classical limit of a quantum system
If we have a one dimensional system where the potential
$$V~=~\begin{cases}\infty & |x|\geq d, \\ a\delta(x) &|x|<d, \end{cases}$$
where $a,d >0$ are positive constants, what then is the corresponding classical case -- the approximate classical case when the quantum number is la... | {} |
zbMATH — the first resource for mathematics
An update on the four-color theorem. (English) Zbl 0908.05040
K. Appel and W. Haken [Bull. Am. Math. Soc. 82, 711-712 (1976; Zbl 0331.05106)] announced a proof of the four-color theorem in 1976, providing an expanded version of that proof in 1989 [Every planar map is four co... | {} |
# How can nitrogen achieve a +V oxidation state?
You mean how can nitrogen achieve a $+ V$ oxidation state.
Consider the nitrate ion, $N {O}_{3}^{-}$. Here, nitrogen has a formal $+ V$ oxidation state (i.e. 3xx-2+N_("ON")=-1). Nitrogen also bears this oxidation state in the NEUTRAL GAS ${N}_{2} {O}_{5}$. Our ideas of ... | {} |
# Taylor Expansion (multivariate)
• Apr 6th 2011, 07:34 PM
Krahl
Taylor Expansion (multivariate)
Hi, I need some help understanding the taylor expansion of a function $g_0(\phi,c,T)$. I'm particularly confused with the 3rd term on the RHS. Why is there a partial derivative there? When I expand it, I get the same as wh... | {} |
# Sparse FGLM algorithms
1 PolSys - Polynomial Systems
LIP6 - Laboratoire d'Informatique de Paris 6, Inria de Paris
Abstract : Given a zero-dimensional ideal $I \subset \kx$ of degree $D$, the transformation of the ordering of its \grobner basis from DRL to LEX is a key step in polynomial system solving and turns out ... | {} |
Math log proof
1. Apr 18, 2004
gnome
Would someone please show me why
$${ a^{log_cb} = b^{log_ca}$$
for all a, b and c.
2. Apr 18, 2004
deltabourne
I don't know if this is really a proof.. but just take the log of both sides:
$${ a^{log_cb} = b^{log_ca}$$
$$log_c { a^{log_cb} = log_c b^{log_ca}$$
$$({log_cb})({... | {} |
Certain Unix and Windows terminals, and also certain R GUIs, e.g. RStudio, support styling terminal output using special control sequences (ANSI sequences).
num_ansi_colors() detects if the current R session supports ANSI sequences, and if it does how many colors are supported.
## Usage
num_ansi_colors(stream = "aut... | {} |
# Normalizing a wavefunction
1. Feb 19, 2014
### fuserofworlds
I was reviewing the infinite square well, using D.J. Griffiths, and came across this small point of confusion. The time-independent solution is shown to be Asin(kx), where the constant A is determined by normalization. Then, in assembling the complete (t... | {} |
# Tag Info
Accepted
### What is Importance Sampling?
Short answer: Importance sampling is a method to reduce variance in Monte Carlo Integration by choosing an estimator close to the shape of the actual function. PDF is an abbreviation for Probability ...
• 3,512
Accepted
### How physically-based is the diffuse and... | {} |
# integral meaning math
Riemann Integral is the other name of the Definite Integral. Two definitions: • being an integer (a number with no fractional part) Example: "there are only integral changes" means any change won't have a fractional part. A derivative is the steepness (or "slope"), as the rate of change, of a c... | {} |
Leetcode - Determine if String Halves Are Alike Solution
# Leetcode - Determine if String Halves Are Alike Solution
You are given a string s of even length. Split this string into two halves of equal lengths, and let a be the first half and b be the second half.
Two strings are alike if they have the same number of ... | {} |
# Differential impedance calculation: reference plane doubt
I'm calculating the width and spacing for my differential signals to meet impedance requirements.
My pcb stackup has embedded layers that I want to use for differential signals, looks like the next table:
...
-------------
GND Layer 35um
-------------
Core ... | {} |
���˘B#�4�A���g�Q@��D � ]�_�^#��k��� 680.6 777.8 736.1 555.6 722.2 750 750 1027.8 750 750 611.1 277.8 500 277.8 500 277.8 Sorry, preview is currently unavailable. 2 MARKOV CHAINS: BASIC THEORY which batteries are replaced. Solution. 277.8 500 555.6 444.4 555.6 444.4 305.6 500 555.6 277.8 305.6 527.8 277.8 833.3 555.6 w... | {} |
# Euler equation through tangency conditions
I am rather new to economics in general and to the Neoclassical Growth Model in particular and I was wondering if there was a way to get the Euler equation for consumption without using the Lagrangian multiplier? Assuming no corner solutions, let's say the agent solves $$\m... | {} |
## Precalculus (6th Edition) Blitzer
The $\text{sine}$ of $t$ is the $y$-coordinate of the point P$\left( x,y \right)$ on the unit circle. Thus, $\sin t=y$. | {} |
## anonymous one year ago Find an exact value. cos 165°
1. Nnesha
whats two number you can add to get 165? and those two number suppose to be on the unit circle
2. Nnesha
then use formula $\large\rm cos(a+b)=\cos a \times \cos b - \sin a \times \sin b$
3. anonymous
90 & 75 ?
4. Nnesha
well 75 is not on the unit... | {} |
# Derivative of squared Frobenius norm of a matrix
In linear regression, the loss function is expressed as
$$\frac1N \left\|XW-Y\right\|_{\text{F}}^2$$
where $X, W, Y$ are matrices. Taking derivative w.r.t $W$ yields
$$\frac 2N \, X^T(XW-Y)$$
Why is this so?
Let
$$\begin{array}{rl} f (\mathrm W) &:= \| \mathrm X... | {} |
Limma DEG analysis experiment with partial paired design + batch effect
1
3
Entering edit mode
@englishserver-15152
Last seen 20 days ago
Iran
Hi! While re-analyzing GSE65106 from GEO, I have constructed a table containing a subset of samples, as follows:
> a # see below for dput(a)
accession cond donor batch pair
... | {} |
# American Institute of Mathematical Sciences
• Previous Article
Decay of solutions for a system of nonlinear Schrödinger equations in 2D
• DCDS Home
• This Issue
• Next Article
Stability and convergence at infinite time of several fully discrete schemes for a Ginzburg-Landau model for nematic liquid crystal flows
Dec... | {} |
# minted and Unicode: symbols missing
Code:
\documentclass{article}
\usepackage{minted}
\begin{document}
\begin{minted}[mathescape,
linenos,
numbersep=5pt,
gobble=2,
frame=lines,
framesep=2mm]{csharp}
string title = "This is a Unicode π in the sky"
/*
Defined as $\pi=\lim_{n\to\infty}\frac{P_n}{d}$ where $P$ is the ... | {} |
## Stream: maths
### Topic: polynomial.map
#### Kevin Buzzard (Oct 14 2020 at 18:06):
polynomial.map has type (R →+* S) → polynomial R → polynomial S. Is there any reason this is not a semiring hom? I was trying to remove a deprecated import; the issue is map.is_semiring_hom, the "old-fashioned" proof (i.e. just wha... | {} |
# 24 Game
(Redirected from Robert Sun)
The 24 Game is an arithmetical card game in which the objective is to find a way to manipulate four integers so that the end result is 24. For example, for the card with the numbers 4, 7, 8, 8, a possible solution is ${\displaystyle (7-(8\div 8))\times 4=24}$.
The game has been... | {} |
# Capture The Flag in class
2018-01-15 #ctf #teaching
Some topics are hard to teach, security is typically one of them. I used to give some lectures about web security, and then do some supervised class work, but it was not very efficient.
On the other hand, we (computer science department) organized some national c... | {} |
News
# A-Power Announces License Agreement To Produce & Sell Fuhrlander’s 2.5MW Wind Turbine
January 28, 2008 by Jeff Shepard
A-Power Energy Generation Systems Ltd. announced that its Chinese operating subsidiary, Liaoning GaoKe Energy Group ("GaoKe"), has entered into a license agreement with Fuhrlander AG of Germa... | {} |
# T_NAKÄ[uO
## GlM[E^ʃe\̌iSj
<< 쐬 F 2012/06/20 00:01 >>
OL܂łɋ߂WATʃ ̍Wϊ߂Ă܂B ܂OƂāA $\left ( T_{\mu \nu }\left ( x \right ) \right )_{P}= \left \{Ag_{\alpha \beta ,\mu \nu }+Bg_{\mu \nu,\alpha \beta } +C\left ( g_{\mu \alpha ,\nu \beta } +g_{\nu \alpha ,\mu \beta }\right ) \right \}\eta ^{\alpha \beta }$ $+\eta ... | {} |
Can you write 67 in the form $$x^2 + 7 y^2$$? By brute force, we find $$67 = 2^2 + 7 \times 3^2$$, so the answer is yes. But what if I ask the same question about a larger prime like 1234577?
We’ll soon learn $$1234577 = x^2 + 7 y^2$$ only if 7 is quadratic residue modulo 1234577. Using quadratic reciprocity, we find ... | {} |
# Kerodon
$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$
Corollary 7.2.2.7. Let $\operatorname{\mathcal{C}}$ be an $\infty$-category containing an object $C \in \operatorname{\mathcal{C}}$ and let $e: A \rightarrow B$ be a left cofinal morphism of simplicial sets. Suppose we are given a diagram $f: B... | {} |
Domains:
Many JavaScript built-in functions support an arbitrary number of arguments.
For instance:
• Math.max(arg1, arg2, ..., argN) -- returns the greatest of the arguments.
• Object.assign(dest, src1, ..., srcN) -- copies properties from src1..N into dest.
• ...and so on.
In this chapter we'll learn how to do th... | {} |
# Diagonalization method by Cantor (2)
I asked a while ago a similar question about this topic. But doing some exercises and using this stuff, I still get stuck. So I have a new question about this topic. (Here is the link for the previous question: Cantor diagonalization method for subsequences).
Now my new question... | {} |
# MakeUnaryCompiledFunction(S, D, I)¶
compiledFunction(expr, x) returns a function f: D -> I defined by f(x) == expr. Function f is compiled and directly applicable to objects of type D.
unaryFunction(a) is a local function | {} |
Help in proving the identity $\frac d {dt}n_s = - \kappa_st$
I want to prove the identity $\frac d {dt}n_s = - \kappa_st$, where $n_s$ is the signed normal, $t$ is the tangent and $k_s$ is the signed curvature of a unit speed plane curve $\gamma$.
I know that $t \cdot n_s = 0$ so by differentiating I get $\frac d {ds... | {} |
Change the chapter
Question
How far apart are two conducting plates that have an electric field strength of $4.50\times 10^{3}\textrm{ V/m}$ between them, if their potential difference is 15.0 kV?
$3.33\textrm{ m}$
Solution Video
# OpenStax College Physics Solution, Chapter 19, Problem 16 (Problems & Exercises) (0:39)... | {} |
# Tag Info
7
you are missing a big factor, the plates are not moving due to the momentum of an initial impulse. They are being actively moved by the push and pull of mantle convection. Much like how icebergs are pulled along by ocean currents. the iceberg analog however breaks down because icebergs melt before they c... | {} |
# How to work around incorrect tooltips in plots exported to HTML
This is an issue that I always wanted to investigate but haven't gotten around to solving yet: The tooltips for contour lines in a plot like this can be very useful in the Notebook interface:
ContourPlot[3 x y^2 - x^3, {x, -1, 1}, {y, -1, 1},
ContourSh... | {} |
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# queue of unique_ptr issue
This topic is 754 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.
## Recommended Posts
Hi,
I'm building a simple engine, and my Node class has a member
queue<unique_ptr<Action>> m_actions
that maintains a que... | {} |
# Nonparametric ICC
Anyone can suggest me a nonparametric version of the intraclass correlation coefficient (ICC)? My model have the following details: two-way random effects model, consistency, average ratings as unit. I am using irr R-cran package.
thank you
-
The ICC is not, in itself, a parametric statistic. You... | {} |
# Testing your PHP Codebase with EnhancePHP
You know it; I know it. We should be testing our code more than we do. Part of the reason we don’t, I think, is that we don’t know exactly how. Well, I’m getting rid of that excuse today: I’m teaching you to test your PHP with the EnhancePHP framework.
## Meet EnhancePHP
I... | {} |
# Curve fitting with two exponential functions
(Bodhibrata Mukhopadhyay) #1
Kindly help me in fitting a function which is formed by the sum of two exponentials to a given data set using cvx.
Given data set (x_i,y_i) i=1,2,…100 ;
Function expression = a_1 e^{b_1}x + a_2 e^{b_2}x
Cost function : \epsilon (a_1,b_1,a_2... | {} |
Which of the following sets of quantum numbers are not permitted?
$1 : \text{ } 2 , 1 , 1 , - \frac{1}{2}$ $2 : \text{ } 2 , 2 , 1 , + \frac{1}{2}$ $3 : \text{ } 3 , 2 , 0 , - \frac{1}{2}$ $4 : \text{ } 4 , 3 , 2 , - \frac{1}{2}$ $5 : \text{ } 4 , 2 , - 3 , + \frac{1}{2}$
Mar 25, 2018
Here's what I got.
Explanation... | {} |
# Interesting modulus
Algebra Level 3
Find the sum of all the integral roots of the equation $|x −1|+|x|+|x +1|=x +2.$
× | {} |
# Solving separable differential equations by formal computations When solving a separable differential equation we move from the original equation N(y)(dy)/(dx)=M(x) to N(y)dy=M(x)dx Then we integrate both sides. My question is how precise is the expression N(y)dy=M(x)dx ? is it a formal writing to simplify computatio... | {} |
The Riemann Hypothesis [duplicate]
(EDIT: I've marked this question as answered in order that I can go away and come up with a better one. Thanks to everybody for the helpful answers.)
Is it possible to describe the RH in language comprehensible to a non-mathematician?
In my experience (as a non-mathematician) the a... | {} |
# Load and Use a Trained Policy¶
In this section you will learn how to extract a trained policy from an experiment snapshot, as well as how to evaluate that policy in an environment.
## Obtaining an experiment snapshot¶
Please refer to this page for information on how to save an experiment snapshot. The snapshot con... | {} |
## Gibbs Free Energy: Spontaneous versus Unstable?
$\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)$
Cowasjee_Sanaea_3E
Posts: 27
Joined: Fri Jul 22, 2016 3:00 am
### Gibbs Free Energ... | {} |
For example look at -sin (t). Also related to the tangent approximation formula is the gradient of a function. Send us a message about “Introduction to the multivariable chain rule” Name: Email address: Comment: Introduction to the multivariable chain rule by Duane Q. Nykamp is licensed under a Creative Commons Attribu... | {} |
# Just how do I make use of (n) curses in Ruby?
I would certainly such as to create a progression bar to show the standing of an a set work in Ruby.
I've read some tutorials/ libraries on making use of (n) curses, none of which were specifically handy in clarifying just how to create an " computer animated" progressi... | {} |
# A train starts from station A with uniform acceleration $\alpha$ for some distance and then goes with uniform retardation $\beta$ for some more time to come to rest at station B.The distance between station A and B is 4 km. and the train takes 4 minutes to complete this journey. If $\alpha$ and $\beta$ are in $km/min... | {} |
# Physics 202 at Portland State 2014
start
## Announcements
past announcements have moved to sidebar and can be found here.
### Final exam solutions
Are added to D2L under “Sample and Past Exams and Solutions” — Nicholas Kuzma 2014/03/24 17:14
### End-of-class Email
Dear Class,
The first term of my engagement a... | {} |
# Difference between revisions of "2006 AMC 10B Problems/Problem 7"
## Problem
Which of the following is equivalent to $\sqrt{\frac{x}{1-\frac{x-1}{x}}}$ when $x < 0$?
$\mathrm{(A) \ } -x\qquad \mathrm{(B) \ } x\qquad \mathrm{(C) \ } 1\qquad \mathrm{(D) \ } \sqrt{\frac{x}{2}}\qquad \mathrm{(E) \ } x\sqrt{-1}$
## So... | {} |
Home » » The scores of 16 students in a Mathematics test are 65, 65, 55, 60, 60, 65, 60, ...
# The scores of 16 students in a Mathematics test are 65, 65, 55, 60, 60, 65, 60, ...
### Question
The scores of 16 students in a Mathematics test are 65, 65, 55, 60, 60, 65, 60, 70, 75, 70, 65, 70, 60, 65, 65, 70. What is t... | {} |
# All Questions
26 views
62 views
### What's the true reason behind thermal expansion?
Thermal expansion is a normal concept everyday. There are 2 explanations: 1, thermal expansion result in stress, then result in deformation 2, thermal expansion result in deformation, then result in ...
11 views
### How to calcu... | {} |
# Thread: Optimization and Calculus problem: Rate of change of oil slick?
1. ## Optimization and Calculus problem: Rate of change of oil slick?
The more i read the question to this problem, the more i understand what it is asking. However, i cannot develop an equation to solve for the rate of change.
Q: A circular o... | {} |
# How does adding a primitive root of unity to a number field effect the ring of integers?
We know that if $$xi$$ is a primitive $$n^text{th}$$-root of unity, then the ring of integers $$mathcal{O}_{mathbb{Q}(xi)}$$ of $$mathbb{Q}(xi)$$ is $$mathbb{Z}(xi)$$.
Can we generalise this result to say much about the ring of... | {} |
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You are viewing an older version of this Concept. Go to the latest version.
# Inscribed Angles in Circles
## Angle with its vertex on a circle and sides that contain chords.
%
Progress
Practice Inscribed Angles in Circles
Progress
%
Inscribed Angles
### Vo... | {} |
# Trait accessing variables of classes using it
I just tried PHP Traits for the first time, to keep my code DRY :
<?php
namespace Acme\DemoBundle\Model;
trait CheckPermissionTrait
{
protected function checkPermission($object_id) {$judge = $this->container->get('acme_judge');$user = $this->container->get('security.c... | {} |
# Template for endianness-free code, data always packed as BIG-Endian
It's been a while since I've been properly grilled about my code.
I had this Idea which should probably never make it into production code but still I couldn't find anything seriously wrong with it at a glance...
#ifndef BITFIELDMEMBER_H
#define B... | {} |
# Question #c9a04
Aug 27, 2017
Permanganate anion is usually oxidized to COLOURLESS $M {n}^{2 +}$
#### Explanation:
And we would represent this reaction by the 5 electron reduction.....
${\underbrace{M n {O}_{4}^{-}}}_{\text{deep purple}} + 8 {H}^{+} + 5 {e}^{-} \rightarrow M {n}^{2 +} + 4 {H}_{2} O$
VERY concent... | {} |
# Area of a parallelogram, vertices $(-1,-1), (4,1), (5,3), (10,5)$.
I need to find the area of a parallelogram with vertices $(-1,-1), (4,1), (5,3), (10,5)$.
If I denote $A=(-1,-1)$, $B=(4,1)$, $C=(5,3)$, $D=(10,5)$, then I see that $\overrightarrow{AB}=(5,2)=\overrightarrow{CD}$. Similarly $\overrightarrow{AC}=\ove... | {} |
# What is branch factor for beam search in RNNs like TensorFlow's Magenta?
TensorFlow's Magenta melody generation module has a parameter for branch_factor1. What is it?
Branch factor in beam search refers to average number of branches at each level of a search tree. When predicting a sequence in an LSTM model, such a... | {} |
If we pute let $\mathbb{F}{q}$ \mathbb{F}_{q}$ be the finite field with$q$elements, is there a local field$F$with residue field $\mathbb{F}{q}$\mathbb{F}_{q}$ ?
If we pute $\mathbb{F}{q}$ the finite field with $q$ elements, is there a local field $F$ with residue field $\mathbb{F}{q}$ ? | {} |
Earthquake-Related Changes in Species Spatial Niche Overlaps in Spring Communities
Abstract
Species interactions between stygobites (obligate groundwater organisms) are poorly known, reflecting the difficulty in studying such organisms in their natural environments. Some insight can be gained from the study of the sp... | {} |
Violations of energy conservation in the early universe may explain dark energy
Discussion in 'Astronomy, Exobiology, & Cosmology' started by paddoboy, Jan 20, 2017.
1. SimonsCatRegistered Member
Messages:
213
I can't work out if he hates being corrected, or... that he is absolutely dog-headed in his beliefs on the... | {} |
# menpofit.differentiable¶
## Differentiable Abstract Classes¶
Objects that are able to compute their own derivatives. | {} |
# यसामन विऻानॊ सॊफॊधी प्रश्नों के सभाधान
Compute $$3.5 \times 4.48697$$. Round the answer appropriately.
Significant Figures Solver
Compute $${1240.64}/{12.5}$$. Round the answer appropriately.
Significant Figures Solver
Compute $$9.3456 + 2140.56$$. Round the answer appropriately.
Significant Figures Solver
Indicate ... | {} |
# Fermat's Last Theorem for Negative $n$
While studying Fermat's Last Theorem and Pythagorean triples, the following question occurred to me: For the equation $a^n+b^n=c^n$, where $n$ is a negative integer, a) does a solution exist, and b) if solutions exist, is there some analog to Fermat's Last Theorem for these par... | {} |
# Empty directories
Today I got asked if it was possible to recurse through a folder structure and find all the empty directories within that structure. It sounded like a simple job for os.walk, and it was.
The os.walk recurses a directory structure returning a 3-tuple for each directory (including the starting direc... | {} |
One of the most comprehensive attempts to do so is described [71] They did this by imaging the previously imaged HR 8799 planets, using just a 1.5 meter-wide portion of the Hale Telescope. In addition, as these planets receive a lot of starlight, it heats them, making thermal emissions potentially detectable. Still, le... | {} |
Talk:Doomsday rule
WikiProject Time
This article is within the scope of WikiProject Time, a collaborative effort to improve the coverage of Time on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Cluttering of table "Memorable... | {} |
Space is discrete?
• B
I be grateful for any feedback on this argument:
- First assume space is continuous
- Then there is an actually infinite amount of information in a spacial volume of 10000 cubic units
- There is also an actually infinite amount of information in a spacial volume of 1 cubic unit
- But this is a ... | {} |
How can I apply formatting to specific menu items or keys or directories in menukeys?
For example, is it possible to color the last item in a menu from the menukeys package? Is there a way to make a macro out of making every last item in menu bold? I would like this macro to work globally.
It would be nice to know ho... | {} |
# Graphing Linear Equations Activity
Find the values of y for two different values of x as shown below. Desmos Classroom Activities Loading. Graphing Linear Equations. Equation Game. Simultaneous Linear Equations Worksheets 1 RTF Simultaneous Linear Equations Worksheets 1 PDF View Answers. Graph linear equations in s... | {} |
# descartes rule of truth
Descartes' rule of sign is used to determine the number of real zeros of a polynomial function. what seems obvious to him. Rule 9 calls for focus on a problem’s simplest elements. “He who entertains doubt on many matters in no wiser than he who has never thought of such matter”. that he exist... | {} |
Section 7 Definitions
## Linear Independence
The vectors $\vec{v_1}, \vec{v_2}, ... ,\vec{v_n}$ in $\Re^n$ are linearly independent if the vector equation
(1)
\begin{align} x_1\vec{v_1} + x_2\vec{v_2} + ... + x_n\vec{v_n} = \vec{0} \end{align}
has only a trivial ($x = 0$) solution.
In summary, a linearly independe... | {} |
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