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# Demand deposits higher required reserves higher
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# Nature of Mathematics
Mathematics
Bookmark
## Quiz 17 : The Nature of Voting and Apportionment
Use Jefferson's plan. Which state does violate the quota rule? Number of seats: 200
Free
Multiple Choice
C
Apportion the indicated number of representatives to two ... | {} |
# Thread: Linear functions and annihilators
1. ## Linear functions and annihilators
Let
V be 'n' dim vector space
f1, f2, f3,..,fm be linear function on V (i.e. belong to dual space of V, V* = Hom(V,F))
W1, W2,....Wm be null-spaces of f1, f2,....f3 respectively.
W = Intersection of (W1,W2,..,Wm)
Consider
1. Annih... | {} |
• October 06, 2015, 07:35:49 PM
### Author Topic: "I'm never shopping THERE again!" Share your story! (Read 1559109 times)
3 Members and 4 Guests are viewing this topic.
#### Reika
• Hero Member
• Posts: 3419
##### Re: "I'm never shopping THERE again!" Share your story!
« Reply #3345 on: December 07, 2012, 04:45:1... | {} |
### Divisibility & Induction
Suppose $x$, $y$, $z$ are positive integers satisfying the equation $\frac{1}{x} - \frac{1}{y} = \frac{1}{z},$ and let $h$ be the highest common factor of $x$, $y$, $z$.
Prove that $hxyz$ is a perfect square.
Prove also that $h(y-x)$ is a perfect square.
Source: British Mathematical Oly... | {} |
1. Regression
Let's say that I have some points...
How do I then use
a) linear regression to fit a line
b)quadratic regression to fit a parabola
I have a TI-84+
2. Originally Posted by VonNemo19
Let's say that I have some points...
How do I then use
a) linear regression to fit a line
b)quadratic regression to fi... | {} |
The isoperimetric problem with a double density
Giorgio Saracco (Università di Trento)
created by pinamonti on 09 Apr 2021
modified by saracco on 12 Apr 2021
13 apr 2021 -- 14:30 [open in google calendar]
Zoom seminar
Please write to Andrea.pinamonti@unitn.it or to Andrea.marchese@unitn.it if you want to attend ... | {} |
# Compound interest derivation of $e$
I'm reviewing stats and probability, including Poisson processes, and I came across: $$e=\displaystyle \lim_{n\rightarrow \infty} \left(1+\frac{1}{n}\right)^n$$ I'd like to understand this more fully, but so far I'm struggling. I guess what I'm trying to understand is how you prov... | {} |
# FHA Streamline Refinance: Rates and Requirements for 2021
Getty Images
We want to help you make more informed decisions. Some links on this page — clearly marked — may take you to a partner website and may result in us earning a referral commission. For more information, see How We Make Money.
With mortgage refinan... | {} |
Journal Search Engine
ISSN : 2288-4637(Print)
ISSN : 2288-4645(Online)
The Journal of Asian Finance, Economics and Business Vol.6 No.1 pp.9-19
DOI : http://doi.org/10.13106/jafeb.2019.vol6.no1.9
# Why Learners Found Transfer Pricing Difficult? Implications for Directors
Indra Abeysekera1, Sam Jebeile2
2 Education Str... | {} |
anonymous one year ago Please help me. I will medal & fan!!!!!!!!** :) If the nth term of a sequence is 2n + 4, what is the sum of the first n terms? A.) n(n+1)+4n B.) n(n+1)/2 +n C.) n(2n+4) D.) n(n+1)(2n+1) /6 + 2n(n+1) E.) 2n(n+1)/n
1. Michele_Laino
the first term is: ${a_1} = 2 \times 1 + 4 = ...?$
2. anonymous
... | {} |
# Tag Info
25
Intel support for IEEE float16 storage format Intel supports IEEE half as a storage type in processors since Ivy Bridge (2013). Storage type means you can get a memory/cache capacity/bandwidth advantage but the compute is done with single precision after converting to and from the IEEE half precision fo... | {} |
# Tag Info
## Hot answers tagged reconstruction
8
I don't get your downsample step when you downsampled by factor $M$. Let me go from scratch with the spectrum visualization below, with time domain, continuous frequency domain and discrete frequency domain from left to right. When we reduce the sampling frequency by... | {} |
# All Questions
15 views
### Milky Way stellar number density : is the stated equation in this paper incorrect?
The paper is : http://www.astro.washington.edu/users/ivezic/Publications/tomographyI.pdf The equation is equation #23 in the paper. It's a model for the density of stars in the Milky Way's disk. It ...
47 ... | {} |
Algebra
Power Mean Inequalities: Level 3 Challenges
Given that $a_1,a_2,a_3,a_4 > 0$, find the maximum constant $N$ for which the following inequality always holds true:
$\frac{a_1a_2(a_3^2+a_4^2)+a_3a_4(a_1^2+a_2^2)}{a_1a_2a_3a_4} \geq N.$
Let $a$ and $b$ be positive real numbers such that $a+b=1$. Find the maximu... | {} |
Home > Help With > Help With Log
# Help With Log
## Contents
Therefore, the natural logarithm of x is defined as the inverse of the natural exponential function: $$\large ln(e^x)=e^{ln(x)}=x$$ In general, the logarithm to base b, written $$\log_b x$$, is the inverse Wird geladen... You will be able to keep track of ... | {} |
## Tag Archives: newtonian potential
### Regularity of Newtonian Potential
Suppose ${\Gamma(\cdot)}$ is the fundamental solution of laplace equation.
$\displaystyle \Gamma(x-y)=\begin{cases}\frac{1}{n(2-n)\omega_n}|x-y|^{2-n}, n>2\\\frac{1}{2\pi}\log|x-y|, n=2.\end{cases}$
We know it has property
$\displaystyle |D... | {} |
# 4.3 Finding the inverse laplace transform
Page 1 / 3
## Using transform tables
The inverse Laplace transform, given by
$x\left(t\right)=\frac{1}{2\pi j}{\int }_{\sigma -j\infty }^{\sigma +j\infty }X\left(s\right){e}^{st}ds$
can be found by directly evaluating the above integral. However since this requires a ba... | {} |
# Heritability: Wikis
Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.
# Encyclopedia
Heritability is the proportion of phenotypic variation in a population that is ... | {} |
If you find any mistakes, please make a comment! Thank you.
The set of prime ideals of a commutative ring contains inclusion-minimal elements
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 7.4 Exercise 7.4.36 Solution: Let $\mathcal{P}$ denote the set of prime ideals. Note that $\mathcal{P}$ is pa... | {} |
# Are there any solvents that dissolve talcum powder?
I understand that talcum powder is insoluble to water, would alcohol or something be able to dissolve it?
Talcum powder is made from talc, a silicate mineral with formula unit: $\ce{Mg3Si4O10(OH)2}$. Silicates tend to be pretty much insoluble in water, but it is p... | {} |
# Recursive neural network
A recursive neural network is a kind of deep neural network created by applying the same set of weights recursively over a structured input, to produce a structured prediction over variable-size input structures, or a scalar prediction on it, by traversing a given structure in topological or... | {} |
# Where did the bias in the fully connected layer go?
This is my first post in the forums so Hi all.
Super impressed with the quality of the information in the MOOC. Big thanks to Jeremy and Rachel.
My question is about the explanation of a simple, fully-connected neural net as described by Jeremy in “Lesson 4: Deep... | {} |
The Ideal of Heroic Citizenship Change [572 Words]
# The Ideal of Heroic Citizenship Change [572 Words]
A
0 points
A+Solution
In an essay of 400 to 800 words (with a typical font and spacing, this will be approximately 1-1/2 to 3 pages), respond to the following question: Sources are the video
How does the ideal o... | {} |
# vSphere CSI Driver - File Volume
The vSphere Vanilla CSI driver version 2.0 and above supports file volumes backed by vSAN File shares to be statically/dynamically created and mounted by stateful containerized applications. This feature allows you to reference the same shared data among multiple pods spread across d... | {} |
## Posts
Book review: Architects of Intelligence by Martin Ford (2018) 2020-08-11T17:30:21.247Z
ofer's Shortform 2019-11-26T14:59:40.664Z
A probabilistic off-switch that the agent is indifferent to 2018-09-25T13:13:16.526Z
Looking for AI Safety Experts to Provide High Level Guidance for RAISE 2018-05-06T02:06:51.626Z
... | {} |
This topic provides instructions for installing and configuring protocol buffers (protobuf) support in the Snowflake Connector for Kafka (“Kafka connector”). Support for protobuf requires Kafka connector 1.5.0 (or higher).
The Kafka connector supports the following versions of the protobuf converter:
Confluent versio... | {} |
# How much does it cost to research and develop a vaccine?
Analyzing the cost of vaccine research
Previously, we estimated how long it takes to research and develop a vaccine and came up with a conclusion that it would take “an average of 29 years [to develop a] typical vaccine, though with high uncertainty based on ... | {} |
Select Page
2. {\displaystyle y_{k}} Denoising is one of the important task and pre-processing step in digital image processing.there are many median filters are available for impulse noise reduction although these methods have been improved, but the quality of denoising image is still not satisfactory[1]. Various ada... | {} |
## Algebra 2 (1st Edition)
$0\leq x\lt45\cup x\gt 70$
Let $x$ be the speed on the highway in mph. Then the illegal range is $0\leq x\lt45\cup x\gt 70$ | {} |
• Corpus ID: 239024326
# On improving a Schur-type theorem in shifted primes
@inproceedings{Wang2021OnIA,
title={On improving a Schur-type theorem in shifted primes},
author={Ruoyi Wang},
year={2021}
}
• R. Wang
• Published 19 October 2021
• Mathematics
We show that if N ≥ exp(exp(exp(k))), then any k-colouring of th... | {} |
# ISEE Lower Level Math : How to multiply
## Example Questions
← Previous 1 3 4 5 6 7 8 9
### Example Question #1 : How To Multiply
Susie needs to buy new supplies for school. Pencils are sold for 23 cents a piece. Notebooks are sold in pairs, at $3.04 a pair. Folders are sold in packages of 4, and each package cos... | {} |
# How would Lagrangian be used tor recover Schrodinger equation?
In path integral formulation of quantum mechanics, I heard that Lagrangian is defined. So, how would Lagrangian in this formulation be used to recover Schrodinger equation that we normally use?
-
Googling "path integrals in quantum mechanics" will give ... | {} |
• ### On the limitations of statistical absorption studies with the Sloan Digital Sky Surveys I--III(1802.01824)
April 4, 2018 astro-ph.GA, astro-ph.IM
We investigate the limitations of statistical absorption measurements with the SDSS optical spectroscopic surveys. We show that changes in the data reduction strategy ... | {} |
## Tuesday, September 6, 2022
### High Precision Composite Op-Amps, Part 2
This post is a part of the series on audio amplifier feedback. The contents of the series can be found here.
My previous post on this topic was on composite opamps from by John D. Yewen's article "High-precision composite op-amps" (Electronic... | {} |
# More algorithms on perfectly balanced photo gallery
Recently there was an article by Johannes Treitz submitted to Hacker News about how to display a set of pictures as nicely as possible. The article doesn't have a formal description of the problem, so here is my take on what it mean by perfectly balanced.
Problem1... | {} |
complete the square 2x2 + 6x + 2. Learn all about the quadratic formula with this step-by-step guide: Quadratic Formula, The MathPapa Guide; Video Lesson. This is a smart application which solves quadratic equations or formulas and gives you the step-by-step solution. High School Math Solutions – Exponential Equation C... | {} |
Version 145 (modified by davarpan1s, 4 years ago) (diff)
Dashes to "to" in table
# Project Name
Infrastructure CNRS_Coriolis Project (long title) Coriolis and Rotational effects on Stratified Turbulence Campaign Title (name data folder) 16CREST Lead Author Jeffrey Peakall Contributor Stephen Darby, Robert Michael D... | {} |
# How do you find the center, vertices, foci and eccentricity of x^2/100 + y^2/64 = 1?
Nov 11, 2015
The ellipse is in the form
${\left(x - h\right)}^{2} / {a}^{2} + {\left(y - k\right)}^{2} / {b}^{2} = 1$
Where
center $= \left(h , k\right)$
focus = $\left(h + c , k\right) , \left(h - c , k\right)$
${c}^{2} = {a}... | {} |
2.8: Angular Velocity
Difficulty Level: At Grade Created by: CK-12
Estimated17 minsto complete
%
Progress
Practice Angular Velocity
MEMORY METER
This indicates how strong in your memory this concept is
Progress
Estimated17 minsto complete
%
Estimated17 minsto complete
%
MEMORY METER
This indicates how strong in your ... | {} |
# Faithful representations and tensor products
Let $G$ be a finite group (or a compact Lie group). Prove that if $\rho:G\to\mathrm{GL}(V)$ is a faithful finite dimensional complex representation of $G$ then any irreducible representation embeds in some tensor product of $V$.
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# Foiled by multiple roots... | {} |
# Reorganize the order of my own blocks
Hello everybody, and happy new year !
I wonder wheather there is a way to reorganize the order of my own blocks ?
( all the blocks which are under Make a block)
Without deleting them and creating the blocks again one by one in the wanted order...
No, sorry. I guess you could e... | {} |
# Plotting atom output
Suggestions and improvements to this utility is most welcome!
Creating pseudopotentials using atom will often require users to post-analyze the output of the program.
Here we aid this visualization process by adding a command line interface for plotting details of the output via a simple comm... | {} |
# Refrigerator fans
#### #12
Joined Nov 30, 2010
18,210
Appliances seem pretty tame for this site, but this is the only forum I am a member at, so...
I've been meeting 4 wire fans in refrigerators lately. I measured about 13 volts DC that the controller board was using to try to get a fan to run yesterday. I assume ... | {} |
# I Ricci tensor in vacuum inside Earth
1. Sep 22, 2016
### AlanE
Imagine a hole drilled through the Earth from which all air has been removed thus creating a vacuum. Let a cluster of test particles in the shape of a sphere be dropped into this hole. The volume of the balls should start to decrease. However, in his ... | {} |
## 8.1 Decision Tree in Hunt’s Algorithm
Hunt’s algorithm builds a decision tree in a recursive fashion by partitioning the training dataset into successively purer subsets. Hunt’s algorithm takes three input values:
1. A training dataset, $$D$$ with a number of attributes,
2. A subset of attributes $$Att_{list}$$ an... | {} |
Tuesday, March 06, 2007
Curious ferocity
Begin a sentence with the first word of the pair and end it with the last. If you need to change the type of word (change ferocious to ferocity or fierce or ferociously) feel free.
curious . . . . . ferocious
unappreciated . . sensitive
vapid . . . . . . crazy
somber. . . . . ... | {} |
# Orbital Mechanics Quandary
1. Mar 11, 2008
### spud three
I had thought that for an object in a simple circular orbit, the escape velocity would be root 2 times it's orbital speed. And that this should approximately apply for the Moon too. However Wikipedia here
http://en.wikipedia.org/wiki/Moon
gives the moon's... | {} |
#### Torch
##### Member
so.....superstitions.....believe in them??
i kinda do.
this week every single one of our techies had something happen to them. Our TD had his hand like eaten away when a light tree collapsed on his hand. Our SM had a wanger slice her leg open, I had a nail impaled into the bone of my foot, ou... | {} |
How to control an underactuated platform with a single servo
What's the best way to control the following type of platform so that it remains balanced and upright?
It's a box supported by a single leg that can pivot at the foot (F) and at the hip (H). The foot and hip joints are designed so that they can only rotate ... | {} |
# Start a new discussion
## Not signed in
Want to take part in these discussions? Sign in if you have an account, or apply for one below
## Site Tag Cloud
Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
• CommentRowNumber1.
• CommentAuthorFinnLawler
• CommentTimeAug 16th... | {} |
# Memoization-based puzzle solution - sums in a triangle
I am trying to solve a problem at Codechef. As I am new to programming, I am not familiar with dynamic programming. However, I do know the basics of recursion and memoization. Hence I implemented a solution to the above mentioned problem. The problem with my sol... | {} |
# A generalization of the Kővári-Sós-Turán theorem
We present a new proof of the Kővári-Sós-Turán theorem that ex(n, K_s,t) = O(n^2-1/t). The new proof is elementary, avoiding the use of convexity. For any d-uniform hypergraph H, let ex_d(n,H) be the maximum possible number of edges in an H-free d-uniform hypergraph o... | {} |
## Which is more ‘fundamental’, the ampere or the coulomb?
An American electrical engineer, William J Beaty, who runs the excellent website (challenging the way in which electrical science is taught), entitled ‘K-6 Misconceptions, which I highly recommend, poses the interesting question: ‘Which is the more fundamental... | {} |
# An expression involving p-th root of unity
Let $\zeta_p$ be a $p$-th root of unity, where $p$ is an odd prime number.
I just came across the following expression:
$$\frac{(\zeta_p^2-\zeta_p+1)^3}{\zeta_p^2(\zeta_p-1)^2}.$$ Can we simplify this expression somehow? For $p=3$, I can rewrite this to $$\frac{8}{(\zeta_... | {} |
781 articles – 3114 Notices [english version]
HAL : in2p3-00329098, version 1
arXiv : 0809.2929
34th International Conference on High-Energy Physics (ICHEP 08), Philadelphia : États-Unis (2008)
Hadronic B Decays to Charm and Charmonium with the BaBar Experiment
BABAR Collaboration(s)
(01/08/2008)
The {\it BaBar... | {} |
# Trajectories¶
For a motor controller supporting the use of a trajectory, and for which the support is effective in BLISS (cf writing a motor controller), trajectories can be defined and used to move axes in complex movements.
## Simple example¶
Here is a simple arc trajectory with two axis (X and Y). So axis X wil... | {} |
APM346-2015F > Test 2
TT2-P2
(1/4) > >>
Victor Ivrii:
Solve
\begin{align}
&u_{y=0}=\frac{1}{x^2+1},\label{2-2}\\
&\max |u |<\infty.\label{2-3}
\end{align}
Hint: Use partial Fourier transform with respect to $x$, and formula
F (x^2+a^2)^{-1}=\frac{1}{2a}e^{-|k|a}\qquad \text{as\ \ } a>0.
\label{2-4}
Xi Yue Wang:
U... | {} |
Hiya! In need of some help, auto relay shutoff for DC less than 24V
mikemikecnc
Joined Feb 15, 2022
10
Hiya!
Ok so I have a 24VDC brake that is messing up and its because when the voltage to it goes to 24vdc or more, it deactivates (releases brake), but the drive going to it needs to shut off (go to 0Vdc) to apply t... | {} |
• 09/08/13 | Adjusted: 08/01/18 | 1 file
Three Composing/Decomposing Problems
Author: Illustrative Mathematics
• Description
• Files
Mathematically:
• Addresses standards: 2.NBT.A and MP.2
• Attends to all three components of the place value system: base-ten units, bundling/unbundling, and positional notat... | {} |
Solve $\lim_{x \rightarrow 0} (a^x + b^x - c^x)^\frac{1}{x}$
I need to solve the limit $$\lim_{x \rightarrow 0} (a^x + b^x - c^x)^\frac{1}{x}$$ when $a,b,c \gt 0$. I'm looking for ways to avoid $\frac{1}{x}$ power.
-
I formatted your question. Please make certain I have done so faithfully. In particular, you mention ... | {} |
# “Runaway argument?” error with \NewEnviron
I have two files. Basically, the main file just loads the environ package and inputs the secondary file. The secondary file creates an environment that basically does nothing, and creates one instance of that environment:
main.tex:
\documentclass{scrartcl}
\usepackage{env... | {} |
## Variability of newly identified B-type stars observed by Kepler
10 Mar 2021 · Wojciech Szewczuk, Przemysław Walczak, Jadwiga Daszyńska-Daszkiewicz ·
Recent re-determination of stellar atmospheric parameters for a sample of stars observed during the {\it Kepler} mission allowed to enlarge the number of {\it Keple... | {} |
# Viewpoint: Fast-Forwarding the Search for New Particles
Physics 11, 90
A proposed machine-learning approach could speed up the analysis that underlies searches for new particles in high-energy collisions.
In the eyes of an old and famous statistics paper [1], searching for evidence of a new particle in the complex ... | {} |
# Just Random
Time Limit: 2000/1000 MS (Java/Others)
Memory Limit: 32768/32768 K (Java/Others)
## Description
Coach Pang and Uncle Yang both love numbers. Every morning they play a game with number together. In each game the following will be done:
1. Coach Pang randomly choose a integer x in [a, b] with equal prob... | {} |
# Use expected bound to derive high probability bound
Suppose that for some integer $p\geq 2$, we have
$$(\mathbb{E}[\lVert \mathbf{X} \rVert^p])^{\frac{1}{p}}\leq C$$ where $C>0$ is a constant as upper bound.
Now, my question is how to convert this into a high probability result? Specifically, I want to have the re... | {} |
# Fixed points and idempotency
Thinking about fixed points, I realised (even if it’s a trivial conclusion) that they can be elegantly used to define idempotency:
A function is idempotent if every member of its codomain is a fixed point.
Fixed point of some function f is any value a for which:
$f(a) = a$
(in functi... | {} |
## Just brushing up on chemistry
Hey guys, im new here. I am a college student that is trying to brush up on some chemistry. I am reading an old textbook that I have, and I didnt understand something.
I was wondering how some would use the Kb of a weak base, how they would determine the value of Ka for the conjugate ... | {} |
Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles an... | {} |
# How to avoid beamer counter incrementing
In Latex beamer, I've created a handout environment for slides that are for the produced handout only (ie. not to be shown on the viewer). It looks like this:
\newenvironment{handout}[2][1]{
\begin{frame}<handout>[environment=handout,allowframebreaks]
}
{\end{frame}}
Key p... | {} |
# American Institute of Mathematical Sciences
October 2019, 24(10): 5337-5354. doi: 10.3934/dcdsb.2019061
## Numerical solution of partial differential equations with stochastic Neumann boundary conditions
Department of Mathematics, Faculty of Sciences, Razi University, Kermanshah, Iran
Received May 2018 Revised... | {} |
Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack
GMAT Club
It is currently 28 Mar 2017, 14:59
### 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 y... | {} |
# SBT 425: CELL AND TISSUE CULTURE
## Course outline
### course out line
1. History and Development of tissue culture
2. Tissue culture equipment and facilities
3. Sterilization techniques
4. Tissue culture media
## lesson 1
### Introduction
Definition of tissue culture Refers to a technique that allows a whole p... | {} |
## On the Nagumo uniqueness theorem.(English)Zbl 1252.34011
The paper discusses a certain generalization of two uniqueness criteria for the Cauchy problem $x'= f(t,x),\;x(0)= 0,\;t\in [0,1].$ The first of the mentioned criteria, due Athanassov, is the following
(1) $$|f(t,x)- f(t,y)|\leq (u'(t)/u(t))|x- y|$$ for $$t\i... | {} |
Hello and welcome to Amir’s website, where you can see some examples of his papers, teaching ideas, and efforts to popularize mathematics including comic strips and children’s books.
Insert math as
$${}$$ | {} |
Question:
# What is the term for the distance and direction of an object from its original starting point? Not speed that is a rate with time, its the distance and direction an matebu is from the starting point?
## Velocity is a vector quantity which refers to "the rate at which an object changes its position." Imagi... | {} |
New Titles | FAQ | Keep Informed | Review Cart | Contact Us Quick Search (Advanced Search ) Browse by Subject General Interest Logic & Foundations Number Theory Algebra & Algebraic Geometry Discrete Math & Combinatorics Analysis Differential Equations Geometry & Topology Probability & Statistics Applications Ma... | {} |
# Surds and Indices MCQ Quiz - Objective Question with Answer for Surds and Indices - Download Free PDF
Last updated on Dec 3, 2022
Surds and Indices often show themselves up in the competitive exams syllabus therefore it’s important to prepare them effectively. Solve Surds and Indices MCQs Quiz so that you never wil... | {} |
# Vector Calculus
• August 4th 2007, 10:57 AM
physics4life
Vector Calculus
hi this is about vector calculus subscript notation:
i generally understand v.c.s.n but can't do something like this:
Show : (AXB) . (CXD) = (A.C)(B.D) - (A.D)(B.C)
my work so far:
$(AXB)i = \varepsilon_{ijk}A_jB_k$
$(CXD)i = \varepsilon_{ij... | {} |
## 3 Shocking Ways to Break Mathematics
This post provides formal proofs of three paradoxes that occur in type systems with unrestricted recursion, negative data types, or type in type (Girard’s paradox). The title is a pun on BuzzFeedy headlines. The source code of the paradoxes is available for download.
An importa... | {} |
# Energy Radiating Off of a Cube Split Into Two Pieces
This is somewhat a Physics question, but ends of being more of an algebra/geometry-related question.
Anyway, there is a cube that radiates with a power $P_0$ and it is "cut" into two pieces. These two pieces radiate energy with a power of $P_1$. Find the ratio of... | {} |
# A fast and accurate coalescent approximation
Blog author Suyash Shringarpure is a postdoc in Carlos Bustamante’s lab. Suyash is interested in statistical and computational problems involved in the analysis of biological data.
The coalescent model is a powerful tool in the population geneticist’s toolbox. It traces ... | {} |
# Conceptual understanding of Schrödinger equation
So I followed this lecture:
which starts of with the statement:
If you have a Schrödinger equation for an energy eigenstate you have
$$-\frac{\hbar}{2m}\frac{d^2}{dx^2}\psi(x) + V(x)\psi(x) = E \psi(x)\tag{1}$$
Question 1: What does it mean to have a energy eigens... | {} |
Thread: need help solving a demand function
1. need help solving a demand function
The demand for a certain fraternity's plastic brownie dishes is q(p) = 360,000 − (p + 1)2
where q represents the number of brownie dishes that the fraternity can sell each month at a price of p¢. Determine the number of brownie dishes ... | {} |
## Section: Scientific Foundations
### Identification and approximation
Identification typically consists in approximating experimental data by the prediction of a model belonging to some model class. It consists therefore of two steps, namely the choice of a suitable model class and the determination of a model in t... | {} |
Specification and validation of POUMM/PMM settings.
specifyPOUMM(
z = NULL,
tree = NULL,
zMin = -10,
zMean = 0,
zMax = 10,
zVar = 4,
zSD = sqrt(zVar),
tMin = 0.1,
tMean = 2,
tMax = 10,
parMapping = NULL,
parLower = NULL,
parUpper = NULL,
g0Prior = NULL,
parInitML = NULL,
control = NULL,
parPriorMCMC = NULL,
parInitMCM... | {} |
If a trait $\mathrm{A}$ exists in $10 \%$ of a population of an asexually
Question.
If a trait $\mathrm{A}$ exists in $10 \%$ of a population of an asexually reproducing species and a trait $\mathrm{B}$ exists in $60 \%$ of the same population, which trait is likely to have arisen earlier?
solution:
The trait $\mathr... | {} |
## October 30, 2016
### Linear Algebraic Groups (Part 4)
#### Posted by John Baez
This time I explain some axioms for an ‘abstract projective plane’, and the extra axiom required to ensure an abstract projective plane comes from a field. Yet again the old Greek mathematicians seem to have been strangely prescient, b... | {} |
# Math Help - Optimization
1. ## Optimization
We just started this new section in optimization, and I don't really have a clue how to set up the word problems. I get that whatever one is attempting to minimize/maximize is what one takes the derivative of; and I also know that the expression that one takes the derivat... | {} |
International Conference on Precision Physics and Fundamental Physical Constants (FFK-2015)
12-16 October 2015
Hungarian Academy of Sciences
Europe/Budapest timezone
The exclusive decays J/psi to D_s*- l+ nu_l in a covariant constituent quark model with infrared confinement
Oct 15, 2015, 10:10 AM
25m
Kis terem (Smal... | {} |
# 1st and 2nd fundamental theorem of calculus
The fundamental theorem of calculus (FTC) is the formula that relates the derivative to the integral and provides us with a method for evaluating definite integrals. First Fundamental Theorem of Calculus. To receive credit as the author, enter your information below. In ev... | {} |
# chains and countability
Given a point $x$ in a topological space $X$. I was wondering, whether one can always find a local basis at $x$, which is totally ordered (a chain) under inclusion. For example this is true for spaces, which have countable local basis: If $\{U_i|i\in\mathbb{N}\}$ is a local basis at $X$, then... | {} |
# Off the Hooke
To grasp nonlinear structural analysis, unlearn Hooke's Law, $latex \sigma = E\varepsilon$. And all derivative outcomes of Hooke's Law. Like $latex \kappa=M/EI$ and $latex {\bf K} {\bf U} = {\bf P}$. https://www.youtube.com/watch?v=z4jeREy7Pbc When steel yields, concrete cracks, etc., Hooke's Law no lo... | {} |
## May 28, 2008
### Manin on Foundations
#### Posted by David Corfield
Out of the series of observations made by Yuri Manin in Truth as value and duty: lessons of mathematics most relevant to us here is:
For a working mathematician, when he/she is concerned at all, “foundations” is simply a general term for the his... | {} |
Did you take the 7th Grade IAR Math Practice Test? If so, then it’s time to review your results to see where you went wrong and what areas you need to improve.
1- Choice C is correct
If the score of Mia was $$90$$, then the score of Ava is $$30$$. Since the score of Emma was one and a half as that of Ava, therefore, t... | {} |
# 20 Rewriting R code in C++
## 20.1 Getting started with C++
Q1: With the basics of C++ in hand, it’s now a great time to practice by reading and writing some simple C++ functions. For each of the following functions, read the code and figure out what the corresponding base R function is. You might not understand ev... | {} |
# Resize font when screen resizes desktop Libgdx
I create my font using the following code:
public BitmapFont createFont(FreeTypeFontGenerator ftfg, float dp)
{
FreeTypeFontParameter f = new FreeTypeFontParameter();
f.size = (int)(dp * Gdx.graphics.getDensity());
f.color = Color.BLACK;
f.minFilter = Texture.TextureFi... | {} |
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# expected true error rate Eccles, West Virginia
Estimation of error rates in discriminant analysis. Dougherty has authored several books including Epistemology of the Cell: A Systems Perspective on Biological Knowledge and Random Proces... | {} |
# Rotational Energy
1. Jul 23, 2008
### Lance WIlliam
A 250 g baseball is pitched at 35 m/s, and it's spinning at 55rad/s .
What fraction of its kinetic energy is rotational? Treat the baseball as a uniform solid sphere of radius 3.8 cm.
What the?! Im pretty lost on this one....
Do I use K_rot_=(1/2)$$I$$$$\omega... | {} |
Linear Formula C 6 H 5 CH=CHCOOH . Soluble in water (1 in 3500), readily soluble in alcohol and oils. Thus, cinnamic acid exhibits a low toxicity. It is a white crystalline compound that is slightly soluble in water, and freely soluble in many organic solvents. Explain the difference between “suspension and Emulsion” O... | {} |
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