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## Wednesday, April 15, 2015 ... //
### Dark matter self-interaction detected?
Off-topic: My Facebook friend Vít Jedlička (SSO, Party of Free Citizens) established a new libertarian country, Liberland (To Live And Let Live), where the government doesn't get on your nerves. Before he elected himself the president, he ... | {} |
Talks
Spring 2016
# Cutoff on all Ramanujan Graphs
Monday, Feb. 22, 2016 2:55 pm3:40 pm
### Add to Calendar
Location:
Calvin Lab
Abstract: Lubotzky, Phillips, and Sarnak (1988) defined a connected $d$-regular graph $G$ (with $d>2$) to be Ramanujan iff for every eigenvalue of its adjacency matrix, its absolute ... | {} |
# What are origins of the definitions for the momentum and position operators in quantum mechanics?
For that matter what is origin for the energy operator? I now they are defined as: $\hat{x} = x$ $\hat{p} = i\hbar\frac{d}{dx}$ $\hat{E} = -i\frac{d}{dt}$
I understand they might not have strict derivations as such but... | {} |
# dot¶
sparse.dot(a, b)[source]
Perform the equivalent of numpy.dot on two arrays.
Parameters: b (a,) – The arrays to perform the dot operation on. The result of the operation. Union[COO, numpy.ndarray] ValueError – If all arguments don’t have zero fill-values.
numpy.dot()
COO.dot() | {} |
Arxivsorter uses the network of co-authorship to estimate a proximity between people.
It then ranks a list of publications using a friends-of-friends algorithm.
It is not a filter and therefore does not lose any information.
J.P. Magué & B. Ménard
[1]
Title: Filaments from the galaxy distribution and from the veloci... | {} |
Article Search
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## Original Article
Split Viewer
International Journal of Fuzzy Logic and Intelligent Systems 2021; 21(1): 86-92
Published online March 25, 2021
https://doi.org/10.5391/IJFIS.2021.21.1.86
© The Korean Institute of Intelligent Systems
## On the Left and Right Almost Hyperideals of LA-Semihypergr... | {} |
# Tag Info
## Hot answers tagged orbital-mechanics
29
The diagram you show is the digital version of a drawing by someone with an Etch-a-Sketch: completely inaccurate. The diagram below is accurate, showing Pioneer 10 & 11 and Voyager 1 & 2 trajectories in a heliocentric, inertial reference frame, of course with the... | {} |
# D'Lembert method
#### Markov
##### Member
Consider
\begin{aligned} & {{u}_{tt}}=9{{u}_{xx}},\text{ }x\in \mathbb{R},\text{ }t>0, \\ & u(x,0)=\left\{ \begin{align} & 1,\text{ }x\in [1,2] \\ & 0,\text{ }x\notin [1,2] \\ \end{align} \right. \\ & {{u}_{t}}(x,0)=0, \end{aligned}
then determine the points of the semipl... | {} |
Status/Archive
This page is for previous player updates on the Discworld MUD's status and discussion, comments are no longer up to date or official. Please wait for permission before deleting ANYTHING from the current Status page. If you are moving information from the current Status page to here, please use the hori... | {} |
# Values of SM parameters at one certain scale
+ 11 like - 0 dislike
54 views
The general question is: What are the values of Standard Model parameters (in the $\bar{MS}$ renormalization scheme) at some scale e.g. $m_{Z}$? As its parametrization in Yukawa matrices is not unique - what are the values of gauge coupling... | {} |
# Command that fills find and replace fields
#1
Hi, I’ve got a lot of small regex expressions in a file I use to convert various latex math equation environments and such. I’d like to make a plugin where I can search through them in the command palette and fill the “find” and “replace” fields in the replace panel sim... | {} |
# Math Help - Newton's method convergence
1. ## Newton's method convergence
Suppose that f(x) has a zero at x = p and that f'(p) != 0. Show that when f''(p) = 0 Newton's methos converges to p with order at least 3.
Is this solved using a Taylor series expansion. And finding a delta and an M?
2. Originally Posted by... | {} |
# Start a new discussion
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## Site Tag Cloud
Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
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With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.
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5.3. Fundamental Transport Modeling
J. Yang, D. Sileri, O. K. Matar
Current models for asphaltene fouling (reviewed in Section 5.1) are based mainly... | {} |
cloudy trunk
cddrive.h File Reference
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
## Functions
void cdInit ()
void cdTalk (bool)
void cdOutput (const char *filename="", const char *mode="w")
void cdInput (const char *filename="", const char *mode="r"... | {} |
# Exchange-traded versus Over-the-counter (OTC) Derivatives
An exchange traded product is a standardized financial instrument that is traded on an organized exchange.
An over the counter (OTC) product or derivative product is a financial instrument traded off an exchange, the price of which is directly dependent upon... | {} |
## Proof That the Set of Arithmetic Sequences is a Vector Space
An arithmetic progression is such that each term is derived from the previous term is by addition of a constant
$d$
.
Suppose we have two arithmetic sequences
$A_1 :a_1, a_1+d_1 , a_1+2d_1 ,..., a_1+nd_1,...$
$A_2 :a_2, a_2+d_2 , a_2+2d_2 ,..., a_2+nd_2,... | {} |
Paul's Online Notes
Home / Calculus I / Review
Show Mobile Notice Show All Notes Hide All Notes
Mobile Notice
You appear to be on a device with a "narrow" screen width (i.e. you are probably on a mobile phone). Due to the nature of the mathematics on this site it is best views in landscape mode. If your device is not i... | {} |
# The complexity of computing the permanent of a matrix of zeroes and ones versus a matrix of integers
How much easier is computing the permanent of a matrix with only zeroes and ones than a matrix of only integers? | {} |
## Some More Notation
Let $$N_i$$ be the set of positions from which the next player can force a win in at most $$i$$ moves.
### Subtraction game
$$S=\{1,2,3\}$$. $$P_0 = \{0\} = P_1$$. $$N_1 = \{1,2,3\} = N_2$$.
$N_{i+1} = \{x \in X \textrm{ s.t. } \exists \textrm{ a move from } x \textrm{ to } P_i\}$ $P_{i+1} = \... | {} |
# All Questions
56 views
### Influence of antidepressant drugs upon personality
How do antidepressant drugs influence someone's personality? Do they induce a major change in an individual's personality, or do they just negate the influence of depression? Basically, is the ...
32 views
### Is there an explanation of... | {} |
# Math 2163 - Calculus III - section 21808
Lecture: MWF 1:30pm–2:20pm, Human Sciences 326
## Text:
The main text we will follow (and which you probably already have) is:
Jon Rogawski, Colin Adams, Calculus: Early Transcendentals, Third Edition, 2015, W. H. Freeman and Company.
Other editions are fine, chapter/secti... | {} |
]> 15.3 Curvature and Radius of Curvature
## 15.3 Curvature and Radius of Curvature
The next important feature of interest is how much the curve differs from being a straight line at position $s$ .
We measure this by the curvature $κ ( s )$ , which is defined by
$κ = | d T ^ ( t ( s ) ) d s |$
which is, the magnit... | {} |
# 色彩管理
Blender's color management is based on the OpenColorIO library. By using the same OpenColorIO configuration in multiple applications, the same color spaces and transforms will be available for consistent results.
## 工作流程
### 场景线性色彩空间
For correct results, different Color Spaces are needed for rendering, di... | {} |
# Math Insight
### Image: A 2D circulating vector field with closed curve
The vector field $\dlvf(x,y) = (y,-x)$ tends to circulate in the clockwise direction. The green curve is the ellipse \begin{align*} \frac{x^2}{4}+\frac{y^2}{9} =1 \end{align*} oriented counterclockwise. The circulation calculated by the line in... | {} |
I have forgotten
• https://me.yahoo.com
COST (GBP)
1.25
0.00
0
# flow enclosed
Computes the radiative heat flow between an enclosing surface and a body found inside it.
Controller: CodeCogs
C++
Excel
## Flow Enclosed
doubleflow_enclosed( double A1 double A2 double T1 double T2 double e1 double e2 )[inline]
This ... | {} |
# The Fabnik..say VAWT?
### Blowin’ in the Wind
The main inspiration for my final project is how to harness low-tech and digital fabrication technology to create sustainable energy solutions for off-grid systems and stand-alone devices.
Advancements in the field of microelectronics have not only miniaturised wireles... | {} |
#### Table of Content
25 June 2022, Volume 42 Issue 3
Articles
BOUNDEDNESS AND EXPONENTIAL STABILIZATION IN A PARABOLIC-ELLIPTIC KELLER–SEGEL MODEL WITH SIGNAL-DEPENDENT MOTILITIES FOR LOCAL SENSING CHEMOTAXIS Jie JIANG Acta mathematica scientia,Series B. 2022, 42 (3): 825-846. DOI: 10.1007/s10473-022-0301-y In thi... | {} |
Gaussian elimination method for solving systems of linear algebraic equations
What do you know about solving systems of linear equations? This type of tasks is often offered to students in linear algebra homework. In one of our videos we discussed that a system of linear equations can be solved using Cramer’s rule whi... | {} |
SERVING THE QUANTITATIVE FINANCE COMMUNITY
Amin
Posts: 2074
Joined: July 14th, 2002, 3:00 am
### Re: Positive Heston European call theta
Just trying to understand on my own, if $t_2$>$t_1$ and terminal time is set at T. If instantaneous variance is denoted as var(t)
$\int_{t_1}^T var(s) ds =\int_{t_1}^{t_2} var(s) d... | {} |
# Equivalence of Definitions of Direct Limit of Sequence of Groups
## Theorem
The following definitions of the concept of Direct Limit of Sequence of Groups are equivalent:
### Explicit Definition
Let $\sequence {G_n}_{n \mathop \in \N}$ be a sequence of groups.
For each $n \in \N$, let $g_n: G_n \to G_{n + 1}$ be... | {} |
# Salary;bi-weekly & semi-monthly HELP PLEASE
• September 13th 2008, 09:42 PM
heidipie
Charlene Hall receives a yearly salary of $24,310.00. She is paid bi-weekly and her regular workweek is 35.5 hours. (a) What is the gross pay per pay period? (b) What is the hourly rate of pay? (c) What is the gross pay for a pay pe... | {} |
How to draw equal length line stripes on a parabola?
Simply put I'm making a basketball game. I'm using these equations to predict the ball position and it works fine:
x = vx * t
y = vy * t + 0.5 * gravity * t * t
But I can't find a way to draw equal length line stripes on the parabola. At this moment I'm using:
t... | {} |
# ΔΣ ADC Programmable Gain Without Amplifier
There are some ΔΣ ADCs of which one can set an input referred gain. Like if there was a PGA between the input and the ADC, but in fact, there seems to be no PGA between the ADC and the inputs but instead the gain is set inside of the ΔΣ modulator somehow.
For example this ... | {} |
# psychopy.tools.mathtools.matrixToQuat¶
psychopy.tools.mathtools.matrixToQuat(m, out=None, dtype=None)[source]
Convert a rotation matrix to a quaternion.
Parameters
• m (array_like) – 3x3 rotation matrix (row-major). A 4x4 affine transformation matrix may be provided, assuming the top-left 3x3 sub-matrix is orthono... | {} |
# Price index
Development of the consumer price index (CPI) in different countries,
from 1998 to 2008
A price index is an economic indicator for the development of selected prices . It indicates how the prices of the goods and services in a shopping basket have changed, for example the consumer price index or the imp... | {} |
## What is the recommended way to Typset/Format Algorithm-related questions? [closed]
What is the recommended way to typeset algorithms?
For example, I have a question about an algorithm related to automata theory, and I would like to render the algorithm in my question.
In Latex I would use the algorithmic package ... | {} |
# Keynesian Cross and Balanced Budget Multiplier
Hi! I am trying to understand the problem above, and was wondering if someone could help me with the last question. I think I am fine with all other questions.
Here is my attempt:
(i) The fiscal multiplier is $$\frac{1}{1-c} \Delta G$$, as it is the infinite sum $$\De... | {} |
# Force Field, Electric Field Intensity and Electric Lines of Force
### Force Field / Electric Field
Every charged particle produces an electric field around itself which can be elucidated/described by bringing another charge near it. When another charged particle is brought in such a field then it experiences a forc... | {} |
Language:
# Invalid Public Action Error
The `Invalid Public Action` error is issued in the following situations:
• `Public Action <action> contains a parameter of record type <type> that is not declared as public`
In a public action, you have a Record (Entity/Structure) parameter that is not declared as public.
Yo... | {} |
#### ☰ MCUNetV1 / MCUNetV2
MCUNetV2: Memory-Efficient Patch-based Inference
for Tiny Deep Learning
Ji Lin 1 , Wei-Ming Chen 1 , Han Cai 1 , Chuang Gan 2 , Song Han 1
Massachusetts Institute of Technology, MIT-IBM Watson AI Lab
Demos
Use Cases
### Citation
@inproceedings{
lin2021mcunetv2,
title={MCUNetV2: Memory-Ef... | {} |
# Server¶
Servers are what manages your copernicus project. They are responsible for generating jobs and the monitoring of these. When you work with a project you use the cpcc command line tool to send messages to the server. The server will process this commands and setup your project and generate jobs for it.
the c... | {} |
## DA white dwarfs observed in LAMOST pilot survey [PDF]
Yue-Yang Zhang, Li-Cai Deng, Chao Liu, Sebastien Lépine, Heidi Jo Newberg, Jeffrey L. Carlin, Kenneth Carrell, Fan Yang, Shuang Gao, Yan Xu, Jing Li, Hao-Tong Zhang, Yong-Heng Zhao, A-Li Luo, Zhong-Rui Bai, Hai-Long Yuan, Ge Jin
A total of $\sim640,000$ objec... | {} |
SCR: Bayesian vs frequentist models
HOME Spatial capture-recapture (SCR) - also known as spatially-explicit capture recapture (SECR) - is the accepted way to estimate density of individually-identifiable animals. The analysis can be done with maximum likelihood (ML) methods or with Bayesian (usually MCMC) methods, but... | {} |
EDOA Aand D 0 B A and B and € G Aand B and DI D All of them
Question:
ED OA Aand D 0 B A and B and € G Aand B and DI D All of them
Similar Solved Questions
Show that the determinant ol
Show that the determinant ol...
9.2g of dinitrogen tetroxide is taken in a closed 1L vessel and heated till the following equil... | {} |
# A doubt in thermodynamics
Tags:
1. Oct 28, 2016
### vijayram
1. The problem statement, all variables and given/known data
As shown in figure.
2. Relevant equations
dq=msdt
3. The attempt at a solution
I am unable to understand the question,what is the significance of the moving piston if the ends of the conducti... | {} |
# Intersection of open dense subsets in a complete metric space is nonempty?
The proof for Baire category theorem in my book assumes that the intersection of dense subsets of a complete metric space is nonempty. Why can this be assumed, why is it true?
It's not true the way you stated it (think $$\Bbb Q$$ and the irr... | {} |
<lift:loc locid="stock.discuss"></lift:loc>
A Note on Conformal Ricci Flow
2011.09.25
http://arxiv.org/abs/1109.5377
In this note we study conformal Ricci flow introduced by Arthur Fischer. We use DeTurck's trick to rewrite conformal Ricci flow as a strong parabolic-elliptic partial differential equations. Then we prov... | {} |
# Examples of Lindelof Spaces that are not Hereditarily Lindelof
We observe from the following statement two examples of Lindelof spaces that are not hereditarily Lindelof.
• Any product space contains a discrete subspace having the same cardinality as the number of factor spaces.
Using the above observation, by cho... | {} |
# Approximate cost calculation
1. Jul 16, 2008
### sergey
Hello!
I have the following formula -
a*k1 + b*k2 + c*k3 = P
This is a formula i'm trying to build. It will be used to calculate price of a specific good (P) according to criterions k1,k2,k3. Every k have its own value, thats why its being multiplied by coeff... | {} |
# Recode: Extraordinary intelligence and the care of infants¶
We recode the model of the article "Extraordinary intelligence and the care of infants" (10.1073/pnas.1506752113) by Steve Piantadosi and Celeste Kidd. The pdf is available here. Here, we only succinctly describe the model. You should consult the original a... | {} |
# Windows Platform Guide
This guide shows how to set up your SDK development environment to build and deploy Cordova apps for Windows 8, Windows 8.1 and Windows Phone 8.1. It shows how to use either shell tools to generate and build apps, or the cross-platform Cordova CLI discussed in The Command-Line Interface. (See ... | {} |
1. Nov 6, 2004
### Canuck156
I'm just curious as to why, when an orbiting body loses velocity (slows down) it's orbit must become more shallow, or smaller. I know this can be explained logically, but I would appreciate if someone could prove mathematically that it should happen.
Thanks.
2. Nov 6, 2004
### Sirus
$... | {} |
# What is the electron configuration of an iron atom?
$1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2} 3 {d}^{6}$
Of the elements discussed in the video, iron is most like Sc, but iron has 5 more electrons in the last subshell which is filled with electrons making its configuration end in $3 {d}^{6}$ rathe... | {} |
Linear Equations in Two Variables05:40 minutes
Video Transcript
TranscriptLinear Equations in Two Variables
Meet Francis and Claire. The two girls are meeting at Claire’s house to get ready for the Cookie Craze annual fundraiser. Their friend, Zoe, set the fundraiser record last year for cookie sales. But this year,... | {} |
Fixing download.kegg, from pathview(), which returns empty xml
4
0
Entering edit mode
@lucmoitinho-8710
Last seen 6.1 years ago
Australia
Hi all,
I found that the download.kegg() function, that is called by pathview(), returns empty empty xml for some kegg pathways. Thus, I couldn't get my data integrated in this cas... | {} |
# How to make a Nebulabrot?
A Nebulabrot is a generalization of the Buddhabrot, a fractal rendering technique related to the Mandelbrot set that sort of looks like a meditating buddha. The Buddhabrot rendering technique was discovered and later described in a 1993 Usenet post to sci.fractals by Melinda Green.
I'm try... | {} |
Bell formula for iterated exponentiation bo198214 Administrator Posts: 1,616 Threads: 102 Joined: Aug 2007 08/26/2007, 10:28 AM Gottfried Wrote:m=arbitrary, integer>0: $\hspace{24} T^{\tiny(m)}_s(x)= \sum_{ k_m...k_1 =0..\infty \\ k_1+k_2+...+k_m=n } x^{k_m} * \left( k_{m-1}^{k_m} \dots k_2^{k_3} k_1^{k_2} \right) * \b... | {} |
Green house (maximum) effect
Tags:
1. Jun 6, 2015
pforeman
Hi,
I have some thoughts about making a much better pool solar cover. My thoughts are to maximize the temperature increase.
I plan to suspend a plastic film 6 inches above the surface of the pool water creating a green house effect.
Normally, very small plas... | {} |
# Trying to evaluate this triple integral?
So I'm trying to evaluate the triple integral $$\displaystyle \iiint \limits_{R} \displaystyle \frac{1}{((x-a)^2+y^2+z^2)^{1/2}} \mathrm dV$$ for $a>1$ over the solid sphere $0 \leq x^2 + y^2 + z^2 \leq 1$.
Apparently, there's an interpretation that I should be able to draw ... | {} |
# interpretation of the equation of a plane
• Jan 26th 2013, 04:14 PM
happymatthematics
interpretation of the equation of a plane
Recently, I found an equation r(s,t)= r0 + sv + tw ,
which is a plane with a point and two vectors lying on it.
I don't know why this is an equation of a plane.
can anyone teach me how to i... | {} |
# Algebra
posted by .
In a certain positive fraction \frac{a}{b} , the numerator is 2 less than the denominator. If the numerator and denominator are interchanged, the fraction is increased by 1 \frac{1}{15} . Find a + b .
## Similar Questions
1. ### math
The numerator of a fractionis 5 less than twice the denomin... | {} |
Basis for a Set of Vectors - Maple Help
# Online Help
###### All Products Maple MapleSim
Home : Support : Online Help : Tasks : Linear Algebra : Vector Manipulations : Basis for a Set of Vectors
Basis for a Set of Vectors
Description Calculate a basis for the vector space spanned by a set of vectors.
Enter... | {} |
Bayesian quadrature is an active learning method for the value of an integral given queries of the integrand on a finite and usually small amount of input locations.
Bayesian quadrature [1, 2] returns not only an estimator, but a full posterior distribution on the integral value which can subsequently be used in decis... | {} |
# Branching solution accepted although it violates presently added lazy constraints
I can not produce a MWE because the code is too big so I am going to describe.
I have a JuMP model and Gurobi optimizer. I launch a callback where cb_where is MIP_SOL and all my variables are integer. On this callback, right after the... | {} |
# Given two lines determine whether the lines are parallel, intersecting, or skew. If intersecting, find point of intersection.
Subject: Calculus 3
Given two lines determine whether the lines are parallel, intersecting, or skew. If intersecting, find point of intersection.
$L1: \frac{1}{2}(x-6) = \frac{1}{3}(y-12) =... | {} |
# How is the enlightenment idea of separation of powers reflected in a founding document of the United States? A. The U.S. constitution creates executive, legislative, and judicial branches of government that can limit each other's power. B.The U.S. constitution establishes a congress with two houses-one in which each ... | {} |
# 3D Solar Cell invented by 12 year old boy.
## Recommended Posts
http://www.katu.com/news/28432984.html
Have a look - they reckon it's 500 times more efficient than normal ones. Makes sense.
##### Share on other sites
Wait, what? So normal solar cells are less than 0.2% efficient?
##### Share on other sites
The... | {} |
# Has the TV show “Who Wants to be a Millionaire” made anyone a millionaire?
The premise of "Who Wants to Be A Millionaire" is that if a contestant correctly answers several questions of approximately increasing difficulty, s/he will become a millionaire.
However, even if they correctly answer the $1,000,000 question... | {} |
Measurement of the $Z(\rightarrow\ell^+\ell^-)\gamma$ production cross-section in $pp$ collisions at $\sqrt{s} =13$ TeV with the ATLAS detector
JHEP 2003 (2020) 054, 2020.
The collaboration
Abstract (data abstract)
CERN-LHC. Measurement of the $Z\gamma\rightarrow \ell^+ \ell^- \gamma$ production cross section in $pp$ ... | {} |
# Brewster angle no reflection
I'm a bit confused about the Brewster angle given by $$\theta_{p} = \tan ^{-1} {\left(\frac{n_2}{n_1}\right)}\;.$$ I think I am correct in saying that if unpolarized light is incident at the Brewster angle, then all light reflecting from the surface is horizontally polarized (so the ligh... | {} |
Formal Framework for Semantic-Aware Collaborations
Laurent Wouters, Stephen Creff, Emma Effa Bella, Ali Koudri
This article is based on “ Towards Semantic-Aware Collaborations in Systems Engineering” published in the Proceedings of the 24th Asia-Pacific Software Engineering Conference, APSEC 2017 by the same authors.... | {} |
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Household Electricity - JEE Important Topic
How do Households Get Electricity?
Last updated date: 23rd Mar 2023
Total views: 77.7k
Views today: 2.55k
There exists a long process behind the generation of electricity at homes. There are many large po... | {} |
# projectivize -- projectivize a differential form or vector field
## Synopsis
• Usage:
projectivize e
• Inputs:
• Outputs:
• an instance of the type DiffAlgElement, the projectivization of e with respect to a new variable. The resulting form or vector field descends to projective space.
## Description
This returns... | {} |
Show Summary Details
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# Open Physics
### formerly Central European Journal of Physics
Editor-in-Chief: Seidel, Sally
Managing Editor: Lesna-Szreter, Paulina
IMPACT FACTOR 2018: 1.005
CiteScore 2018: 1.01
SCImago Journal Rank (SJR) 2018: 0.237
Source Normalized Impact per Paper (SNIP) 2018: 0.541
I... | {} |
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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 ... | {} |
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# A convergent hierarchy of non-linear eigenproblems to compute the joint spectral radius of nonnegative matrices
1 TROPICAL - TROPICAL
CMAP - Centre de Mathématiques Appliquées - Ecole Polytechnique, Inria Saclay - Ile de France
Abstract : We show that the joint ... | {} |
Integer type: int32 int64 nag_int show int32 show int32 show int64 show int64 show nag_int show nag_int
Chapter Contents
Chapter Introduction
NAG Toolbox
# NAG Toolbox Chapter IntroductionS — approximations of special functions
## Scope of the Chapter
This chapter is concerned with the provision of some co... | {} |
# American Institute of Mathematical Sciences
August 2017, 11(3): 453-469. doi: 10.3934/amc.2017038
## Computing elliptic curve discrete logarithms with improved baby-step giant-step algorithm
1 Mathematics Department, University of Auckland, New Zealand 2 College of Information Engineering, Shenzhen University, S... | {} |
# Parametric Plot EPS Export Jumping Frames
Observe the following Wolfram Mathematica (11) code. Essentially I'm just creating a parametric plot with another parameter a to be varied with time and then animating it to be ten seconds long by exporting 601 .eps images, or frames (the first and last frames identical), me... | {} |
# We have an urn with 6 red balls and 4 green balls.
We have an urn with 6 red balls and 4 green balls. We draw balls from the urn one by one without replacement, noting the order of the colors, until the urn is empty. Let X be the number of red balls in the first five draws, and Y the number of red balls in the last ... | {} |
# Lesson 24
• Let’s work with situations and quadratic equations.
### 24.1: Growing Plants
Plant A’s height over time is represented by $$y=\frac{1}{2}x+4$$. Plant B’s height is $$y=\frac{1}{3}x+3$$ for which $$x$$ represents the number of weeks since the plants were found, and $$y$$ represents the height in inches.... | {} |
# Blog
## Markup for DOIs
thammond – 2007 March 29
Following up on his earlier post (which was also blogged to CrossTech here), Leigh Dodds is now Following up on his earlier post (which was also blogged to CrossTech here), Leigh Dodds is now the possibility of using machine-readable auto-discovery type links for DO... | {} |
# Finding Holes Fast
## Introduction
Suppose a directed graph. We will define “hole” as a node that doesn’t point at any node and it’s pointed by every node of the graph (except itself).
The task is to find all the holes in a graph, given a common adjacency matrix or adjacency list. A common one. No data structure c... | {} |
Carbon dating half life formula
How is carbon dating done?. with a half life of 5730 years. you can come up with the nice formula (1/2) n =.Radioactive Dating. Carbon-14 has a half life of 5730 years,. Plugging these numbers into the decay equation along with the half-life,.Half-Lives and Radioactive Decay Kinetics. L... | {} |
# I noticed a pattern, does this have a name?
First of all I am a programmer, not a mathematician, so I may articulate what I am trying to say very poorly. I was working with powers of $2$ when I noticed a relationship I had never noticed before. Basically, if you look at the powers of $2$, every other power of two ca... | {} |
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# Set is Open iff Union of Open Balls
## Theorem
Let $M = \struct {A, d}$ be a metric space.
Let $U \subseteq A$.
Then $U$ is open in $M$ if and only if it is a union of open balls.
## Proof 1
### Necessary Condition
Let $U$ be open in $M$.
Let $a \in U$.
Then by definition of open set:
$\exists \delta_a \in ... | {} |
# Elephant
For you archaeological types who wish to collect elephants but are too woosy to actually kill the fiends we have a small supply of Ceremonial elephants
Elephants are a type of mutant spiders that came from the sun. They like to have beer on a Friday night and often are often scene watching Star Wars episo... | {} |
Last edited by Doutaur
Monday, July 27, 2020 | History
4 edition of Theory of Phase Transitions (International series in natural philosophy) found in the catalog.
Theory of Phase Transitions (International series in natural philosophy)
Ya G. Sinai
# Theory of Phase Transitions (International series in natural philo... | {} |
Adding up work estimates with probabilities
When asked how long a software development task will take I've started giving estimates with a probability that it will be completed within that estimate. This lets me communicate a confidence in the estimate, i.e. 80% chance of fixing a bug in 3 days. If I know little about... | {} |
Question 8
# If '-' means '+', '×' means '÷', '÷' means '-' and '+' means '×', then9 × 6 + 36 - 4 = ?
Solution
Expression : 9 × 6 + 36 - 4 = ?
$$\equiv9\div6\times36+4$$
= $$(\frac{9}{6}\times36)+4$$
= $$(9\times6)+4$$
= $$54+4=58$$
=> Ans - (A) | {} |
Particle in a box. KE from Δx?
1. Oct 7, 2013
Hertz
1. The problem statement, all variables and given/known data
Suppose a particle is confined in one dimension to a region of width L. Obtain an approximate formula for its minimum kinetic energy.
2. Relevant equations
ΔxΔp ≥ h/4π
3. The attempt at a solution
1.... | {} |
Balbharti Maharashtra State Board 11th Maths Book Solutions Pdf Chapter 5 Sets and Relations Ex 5.1 Questions and Answers.
## Maharashtra State Board 11th Maths Solutions Chapter 5 Sets and Relations Ex 5.1
Question 1.
Describe the following sets in Roster form:
(i) A = {x/x is a letter of the word ‘MOVEMENT’}
(ii) B... | {} |
# Definition:Proper Mapping
## Definition
Let $X$ and $Y$ be topological spaces.
A mapping $f: X \to Y$ is proper if and only if for every compact subset $K \subset Y$, its preimage $f^{-1} \left({K}\right)$ is also compact.
## Also defined as
A proper mapping is sometimes defined as a closed mapping such that the... | {} |
Tag Info
22
The reason is because the time taken for the two trips are different, so the average speed is not simply $\frac{v_1 + v_2}{2}$ We should go back to the definition. The average speed is always (total length) ÷ (total time). In your case, the total time can be calculated as \begin{align} \text{time}_1 &= \f... | {} |
I am plotting 2D functions on Sage, and I would like to move the values displayed along the $y$ axis (the ticks) from the left of the axis to the rigth, because they bother me there. I had a look and I think this can be done in Python with matplotlib (using set_tick_params() or set_ticks_position()) which is included i... | {} |
## Help needed... I'll rate lifesaver
Show that each of the following sets is countable by establishing abijection between the set and N.
a) The set of lists over {a} that have even length. | {} |
Why $C^{\infty}(M)$ module of sections of a vector bundle $E\rightarrow M$ is a reflexive module?
As the title saying,
Why $C^{\infty}(M)$ module of sections of a vector bundle $E\rightarrow M$ is a reflexive module?
Here we are considering vector bundles with finite-dimensional fibers.
-
Surely this just boils dow... | {} |
Math Help - direct integration
1. direct integration
$\int tan(x/2).sec^2(x/2)+sec^2(x/2)$
$t=(x/2)$
$\int tan(t). sec^2(t)dt+tan(t) = -ln[cos(t)]+tan(t)+C$
But isnt correct, i'm afraid my substitution is not correct
2. Re: direct integration
$\int \tan\left(\frac{x}{2} \right)\sec^2\left(\frac{x}{2} \right)+\sec^... | {} |
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