text stringlengths 100 957k | meta stringclasses 1
value |
|---|---|
# Error Messages to Fear
The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown.
Supernatural Horror in Literature, HP Lovecraft, 1927.
Security error messages appear to take pride in providing limited information. In particular, they are usually some ge... | {} |
## Tensors #2
Welcome back to the beginning of my journey into the world of multilinear algebra. In this post, I want to discuss the definition I previously gave of the tensor product of two vector spaces. There are many ways to define it, and the definition I gave was through a universal property. One thing I have fo... | {} |
# Pluses and Minuses
Level pending
Let us write the numbers 1,2,3,...,2014 in order in a row. In how many ways can you put + and - symbols between the terms so that the sum of the 2014 numbers is 0?
$$\textbf{Details and Assumptions}$$
There must be an operator in all of the 2013 gaps between terms
× | {} |
zurück
Abstract:
The method of convex integration originally comes from differential geometry. It was first used in 1954 in Nash's solution to the isometric embedding problem and was later brought to fluid dynamics. In this talk we will first visit some of the well-known results achieved by convex integration and the... | {} |
# The network complexity and the Turing machine complexity of finite functions
@article{Schnorr1976TheNC,
title={The network complexity and the Turing machine complexity of finite functions},
author={Claus-Peter Schnorr},
journal={Acta Informatica},
year={1976},
volume={7},
pages={95-107}
}
Let L(f) be the network com... | {} |
# How series resistors influence clearance-creepage requirements?
simulate this circuit – Schematic created using CircuitLab
I'm designing a circuit which should leak some amount of current from AC line to PE. The question is regarding clearance-creepage calculation for this specific case.
The part (triac optocouple... | {} |
Searching....
# 9.5.4 Gaussians On Surface Tesserae Simulate HYdrostatic Pressure (GOSTSHYP)
(July 14, 2022)
The Gaussians On Surface Tesserae Simulate HYdrostatic Pressure (GOSTSHYP) method, which was introduced by Scheurer and co-workers, 1058 Scheurer M. et al.
J. Chem. Theory Comput.
(2021), 17, pp. 583.
overcom... | {} |
# 2012 AMC 12B Problems/Problem 17
## Problem
Square $PQRS$ lies in the first quadrant. Points $(3,0), (5,0), (7,0),$ and $(13,0)$ lie on lines $SP, RQ, PQ$, and $SR$, respectively. What is the sum of the coordinates of the center of the square $PQRS$?
$\textbf{(A)}\ 6\qquad\textbf{(B)}\ 6.2\qquad\textbf{(C)}\ 6.4\q... | {} |
1. ## Help
I am trying to simplify the end of this half angle problem
How do I get from $\sqrt{(9-\sqrt{17})/(18)}$
to:
$(1/3)\sqrt{(9-\sqrt{17})/(2)}$
2. ## Re: Help
Working backwards:
Since the two is on the denominator it is essentially multiplying the (9-(17)^(1/2)) by 1/2. So to get 1/3 into the denominator ... | {} |
# American Institute of Mathematical Sciences
August 2016, 9(4): 1025-1038. doi: 10.3934/dcdss.2016040
## Multiple homoclinic solutions for a one-dimensional Schrödinger equation
1 Department of Mathematics - University of Torino, Via Carlo Alberto, 10 - 10123 Torino 2 Dipartimento di Scienze Matematiche, Informat... | {} |
According to Artificial Intelligence: A Modern Approach 4th edition in IDA* the cutoff is the $f$-cost($g+h$); at each iteration, the cutoff value is the smallest $f$-cost of any node that exceeded the cutoff on the previous iteration. In other words, each iteration exhaustively searches an $f$-contour, finds a node ju... | {} |
# What percent of 1 is 3? make sure the answer is fully reduced.
What percent of 1 is 3? make sure the answer is fully reduced.
## This Post Has 3 Comments
1. korirosekc says:
0.3
step-by-step explanation:
2. Expert says:
Teri ma ki chhut
3. Expert says:
d
step-by-step explanation:
d | {} |
## September 10, 2009
### Towards a Computer-Aided System for Real Mathematics
#### Posted by John Baez
I’ve known Arnold Neumaier for quite a while, thanks to many discussions on the newsgroup sci.physics.research. Recently he sent me a proposal for a system called FMATHL (Formal Mathematical Language), designed to... | {} |
# Why does the pressure change on uniformly mixing two liquids?
The two cylinders are connected the upper cylinder has a cross-section of A and the lower one has a cross-section of 2A (I've taken the cross-sections to be A and 2A as they are easier to work with than the radii r and 2r).
Initially the liquid present i... | {} |
### Why so many significant phase III results in clinical trials?. (arXiv:1907.00185v2 [econ.GN] UPDATED)
Planning and execution of clinical research and publication of results should conform to the highest ethical standards, given that human lives are at stake. However, economic incentives can generate conflicts of i... | {} |
# Spurious comma by use of \glsaddallunused
I am compiling the following document with glossaries v4.11:
\documentclass[a4paper]{report}
\usepackage{glossaries}
\makeglossaries
\newglossaryentry{foo}{name={foo},description={Foo}}
\newglossaryentry{bar}{name={bar},description={Bar}}
\newglossaryentry{baz}{name={baz}... | {} |
# Synopsis: Getting closer to the Bohr model
An algebraic version of Bohr’s collective model is shown to be an effective tool for the analysis of rotational and vibrational spectra in nuclei.
In the algebraic collective model, the five variables define the quadrupole moments of a nucleus. A group theoretical approach... | {} |
# Inequality without factor table
Gold Member
I am trying to solve this inequality without using a factor table.
The problem
$$\frac{x+4}{x-1} > 0$$
The attempt at a solution
As I can see ##x \neq 1##. I want to muliply both sides of the expression with x-1 to get rid of it, from the fraction. But before that, I ha... | {} |
pylops.signalprocessing.Patch3D¶
pylops.signalprocessing.Patch3D(Op, dims, dimsd, nwin, nover, nop, tapertype='hanning', scalings=None, name='P')[source]
3D Patch transform operator.
Apply a transform operator Op repeatedly to patches of the model vector in forward mode and patches of the data vector in adjoint mode... | {} |
11.8 Cohesion and adhesion in liquids: surface tension and capillary
Page 1 / 11
• Understand cohesive and adhesive forces.
• Define surface tension.
• Understand capillary action.
Children blow soap bubbles and play in the spray of a sprinkler on a hot summer day. (See [link] .) An underwater spider keeps his air s... | {} |
# zbMATH — the first resource for mathematics
The topology of free topological groups. (Russian. English summary) Zbl 1068.22002
Fundam. Prikl. Mat. 9, No. 2, 99-204 (2003); translation in J. Math. Sci., New York 131, No. 4, 5765-5838 (2005).
This paper deals with the notion of the free topological group $$F(X)$$ in t... | {} |
## Content description
Describe translations, reflections in an axis, and rotations of multiples of 90 ° on the Cartesian plane using coordinates. Identify line and rotational symmetries (ACMMG181)
Source: Australian Curriculum, Assessment and Reporting Authority (ACARA)
There is a separate resource for line and rot... | {} |
# Car collision
1. Sep 7, 2009
### Bryon
1. The problem statement, all variables and given/known data
I am trying to find the time a collision occurs of car 1 that is travelling 31m/s and can accelerate at -1.8m/s and car 2 that is traveling at a constant velocity of 6m/s.
2. Relevant equations
v(final)^2=v(initi... | {} |
Recent questions and answers in States of Matter: Liquids and Gases
A gas occupies one litre under atmosphere pressure. What will be the volume of the same amount of gas under 750mm of Hg at the same temperature?
To see more, click for all the questions in this category. | {} |
# Constructing a List from a Decimal Number
I am trying to get from a number such as $12.345$ to a list $\{1,2,3,4,5\}$. My best attempt so far has been:
First[RealDigits[12.345]]
however this of course gives $\{1, 2, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0\}$ since it assumes the number to have infinite precision... | {} |
Winning spelling algorithm
New Book Reviews!
Winning spelling algorithm
Written by Lucy Black
Sunday, 24 July 2011
There were over 300 participants in the Microsoft Research/Bing Speller Challenge. The winners were selected automatically and were presented with prizes at a workshop last month.
The problem that thi... | {} |
# Simulating Exploding Dice
Your task is to make a program that takes in an integer n > 1, and outputs the roll of a single n-sided die. However, this dice follows the rules for exploding dice.
When you roll the die, check what value you rolled. If you got the maximum for that kind of die (on a standard d4 that would... | {} |
# Packages
The packages you will need for this workshop are as follows. I am also including the hex codes for a colorblind-friendly palette, which I use for my plots.
library(tidyverse)
library(ordinal)
library(MASS)
library(ggeffects)
library(effects)
cbPalette <- c("#999999", "#E69F00", "#56B4E9", "#009E73", "#F0E4... | {} |
The magnitude of the torque vector $$~\tau~$$ for a torque produced by a given force $$~ F~$$ is $$\tau =r\times F= F \cdot r \sin(\theta)~,$$ where $$~r~$$ is the length of the moment arm and $$~\theta~$$ is the angle between the force vector and the moment arm. | {} |
# heavytailed
## November 17, 2014
### The Libor Market Model
Filed under: Uncategorized — Tags: , , , — heavytailed @ 9:15 pm
Among statisticians (particularly biostatisticians), hearing ‘LMM’ immediately triggers “Linear Mixed Model” and scary thoughts about random effects. Among quant circles the association is ... | {} |
# Convert to Regular Notation -4.12*10^-3
-4.12×10-3
Since the exponent of the scientific notation is negative, move the decimal point 3 places to the left.
-0.00412
Convert to Regular Notation -4.12*10^-3
Scroll to top | {} |
# Logistic Growth Models (interpreting r value)
1. Jan 28, 2014
### thelema418
I originally posted this on the Biology message boards. But I have not received any responses.
In models of exponential growth, we have an intrinsic growth rate (r) that is calculated as the difference of birth rates to death rates.
Wit... | {} |
How to operate with function body without evaluation
I have several functions (let a[x] and b[x]), defined as expressions with integrals and differentiations. I want to perform some manipulations with these expressions - for example, ask Mathematica to simplify a[x] + b[x] without evaluations of integrals. Hold doesn'... | {} |
# State Space in TI-Basic
Just for fun, running a state-space simulation in TI-Basic
January 2, 2017 -
TI-Basic holds a special place in my heart - It's a terrible language on a terrible device, but I have fond memories of wasting time in my Algebra II/Trig class programming 2048, so that I could wast time in class ... | {} |
# glmmrBase
(Version 0.2.2) R package to support the specification of generalised linear mixed models using the R6 object-orientated class system.
## Generalised linear mixed models
A generalised linear mixed model (GLMM) has a mean function for observation $$i$$ is
$\mu_i = \mathbf{x}_i\beta + \mathbf{z}_i \mathbf... | {} |
# Simple understanding of convex co-compactness
I was looking for the definition of the term "convex co-compact" in simple cases. But most references I find are looking into a little bit sophisticated notions such as mapping class group, Schottky subgroup and higher dimensional hyperbolic spaces. I would like to under... | {} |
# Timing A Function in C++
March 31, 2020 - John Law - 4 mins read
Recently, I encountered the following interview question:
Write a function that returns true if it has been called 3 times in 3 seconds.
To solve this, I have used a traditional C-style approach (in C++):
#include<iostream>
#include<ctime>
#include... | {} |
Computationaly hard detokenization algorithm for credit card numbers
I am designing a vault that tokenizes credit card numbers (a plaintext that consists of 16 decimal digits), with the following requirements:
1. Given some plaintext, the vault returns an index. If the plaintext does not exist it returns a new index.... | {} |
# Probabilistic data structures. Quotient filter
In this article, we continue our acquaintance with implementations of probabilistic sets and consider a modern successor of the Bloom filter that is called Quotient filter. Such data structures can effectively work in situations when we need to handle billions of elemen... | {} |
# [NRG] Reminder: NRG Meeting: "Modern DNS cache network" (Nicaise Eric Cho... @ Mon Sep 23, 2013 11am - 12pm (NRG Calendar)
Sun Sep 22 11:00:07 EDT 2013
This is a reminder for:
Title: NRG Meeting: "Modern DNS cache network" (Nicaise Eric Choungmo
Fofack)
Title: Modern DNS cache network
Presenter: Nicaise Eric Chou... | {} |
# I Chain rule in a multi-variable function
Tags:
1. May 7, 2016
### Ananthan9470
Suppose you have a parameterized muli-varied function of the from $F[x(t),y(t),\dot{x}(t),\dot{y}(t)]$ and asked to find $\frac{dF}{dt}$, is this the correct expression according to chain rule? I am confused because of the derivative t... | {} |
# Digital signal processing
## z-Transformation
The infinite impulse response is a property of a filter of digital signal processing. The filter response of the impulse signal does not end infinitely. The filter can be represented in either the time domain or frequency domain. Time-domain filter modifies time-domain ... | {} |
# Team:Aachen/Interlab Study/Hardware
(Difference between revisions)
Revision as of 22:13, 22 August 2014 (view source)Mjoppich (Talk | contribs) (→Open-Source DIY Hardware)← Older edit Revision as of 22:24, 22 August 2014 (view source)Mjoppich (Talk | contribs) (→Open-Source DIY Hardware)Newer edit → Line 6: Line 6:... | {} |
Black holes: A first pass
What is a black hole?
The central idea behind black holes is the notion of trapping. Can there be a region of space where one can go in, but from which one cannot come out? Such a region is called a black hole.
Why should we think such regions might exist? The reason is gravity. Gravity is ... | {} |
Share
# Selina solutions for Concise Physics Class 10 ICSE chapter 1 - Force [Latest edition]
Course
Textbook page
## Chapter 1: Force
Exercise -1 (A)Exercise - 1 (A)OthersExercise -1(A)Exercise - 1(A)Exercise - 1 (B)Exercise - 1 (C)
#### Selina solutions for Concise Physics Class 10 ICSE Chapter 1 Force Exercise ... | {} |
# By you
Geometry Level pending
Let $$M$$ be the midpoint of side $$BC$$ of triangle $$ABC$$. Let the median $$AM$$ intersect the incircle of $$ABC$$ at $$K$$ and $$L, K$$ being nearer to $$A$$ than $$L$$, where $$AK=KL=LM$$. If the ratio of the sides of triangle $$ABC$$ are in ratio $$x:y:z$$. Find $$x+y+z$$.
× | {} |
# Journal of Operator Theory
Volume 73, Issue 1, Winter 2015 pp. 71-90.
On fluctuations of traces of large matrices over a non-commutative algebra
Authors: Yong Jiao (1) and Mihai Popa (2)
Author institution:(1) Institute of Probability and Statistics, Central South University, Changsha 410075, China
(2) Universit... | {} |
(Redirected from Angular mil)
Not to be confused with Minute of arc.
The PSO-1 reticle in a Dragunov sniper rifle has 10 horizontal lines with 1-mil spacing, which can be used to compensate for wind drift or for range estimation.
Unit system SI derived unit
Unit of Angle
Unit conversions
1 mil in ... ... is equal to ..... | {} |
## Voodoo Correlations and Correlation Picking
Ex post selection based on correlation has been a long-standing issue at this blog (and has been independently discussed at other blogs from time to time – Luboš, Jeff Id and David Stockwell have all written on it independently. The issue came back into focus with Mann 20... | {} |
# Are GARCH models dependent on the returns forecasting model?
Hi Quantitative Fiance Stack Exchange,
It's my first go at GARCH models so please give me a chance with my phrasing.
I understand that GARCH models are used to forecast volatility. The GARCH(1,1) takes the form:
$$\sigma^2_t=\alpha+\beta_1\epsilon_{t-1}... | {} |
Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles an... | {} |
# zbMATH — the first resource for mathematics
## Fitting, Melvin Chris
Compute Distance To:
Author ID: fitting.melvin-c Published as: Fitting, M.; Fitting, M. C.; Fitting, Melvin; Fitting, Melvin C. Homepage: http://www.melvinfitting.org/ External Links: MGP · Wikidata · dblp · GND
Documents Indexed: 110 Publicatio... | {} |
# mms&convergence seminar
The mms&convergence seminar is devoted to Sectional/Ricci lower bounds, Gromov-Hausdorff and Intrinsic Flat convergence and, in general, metric measure spaces.
In 2020 I organized it on my own and since 2021 Daniele Semola became a co-organizer.
The schedule for Spring 2022 was announced --... | {} |
# Biblatex and mla-paper making weird headings
I'm trying to use mla-paper and biblatex with MLA style in the same document so I can have a managed bibliography but with the whole document in MLA. I seem to have it working almost properly, but it produces a bibliography heading that is larger than the title of the doc... | {} |
What are the positive and negative effects of the ozone layer?
Having ozone ( ${O}_{3}$) in the troposphere (the layer of the atmosphere we live in) can be damaging to vegetation and respiratory systems of many mammals. Additionally ozone is a main contributor to smog found in dense urban areas. | {} |
# What does 'energy dissipation' in the description of the Kolmogorov Microscales in fluid dynamics mean?
I've asked about microscales before, and thinking more about the problem turned up more basic questions. Consider the length scale of a microscale: $$\eta = \left(\frac{\nu^3}{\epsilon}\right)^\frac{1}{4}$$ With $... | {} |
# Topics on Test #2
1) LHopital’s Rule
2) Related Rates
3) Implicit Differentiation
4) Optimizations
5) Anti-derivatives
6) Curve Sketching
7) Extreme Values
8) Monotonicity
9) Shape Of Graphs
These are the topics I can think of on the top of my head.
This entry was posted in Homework, Uncategorized. Bookmar... | {} |
# From vertex operator algebras to conformal nets and back
Sebastiano Carpi, Yasuyuki Kawahigashi, Roberto Longo, Mihaly Weiner
March 04, 2015
We consider unitary simple vertex operator algebras whose vertex operators satisfy certain energy bounds and a strong form of locality and call them strongly local. We present ... | {} |
# Convexity on a direction
In "Ming-Jun Lai, Larry L. Schumaker. Spline Functions on Triangulations. Cambridge University Press, 2007, p.72." we have:
A function $f$ defined on a triangle $T$ is said to be convex in the direction $u$ provided
$$\frac{f(w_3)-f(w_2)}{|w_3-w_2|} \ge \frac{f(w_2)-f(w_1)}{|w_2-w_1|}$$
for... | {} |
# Evaluate the indefinite integral. {eq}\int {{{\cos }^8}\left( \theta \right)\sin \left( \theta \right)} \ d\theta {/eq}
## Question:
Evaluate the indefinite integral.
{eq}\int {{{\cos }^8}\left( \theta \right)\sin \left( \theta \right)} \ d\theta {/eq}
## U-Substitution Method:
In calculus integral, the u-substi... | {} |
# On the determinant of an odd, continuous Galois representation.
In his paper, Duke paper, Serre consider continuous, odd Galois representation $\rho: G_{\mathbb{Q}}\longrightarrow GL_{n}(\overline{\mathbb{F}}_{p})$ where $p$ is a rational prime. Roughly, (I don't understand much French except for the help from Googl... | {} |
Does diffusion happens for the photons from higher concentration to lower concentration
I understand that it is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration and the diffusion will continue until the concentration gradient has been ... | {} |
# Difference between revisions of "1976 IMO Problems/Problem 4"
## Problem
Determine the greatest number, who is the product of some positive integers, and the sum of these numbers is $1976.$
## Solution
Since $3*3=2*2*2+1$, 3's are more efficient than 2's. We try to prove that 3's are more efficient than anything:... | {} |
# All Questions
775 views
### How to compute for basis adjusted forward rate?
To give you a brief background, I'm valuing a fixed-for-float Interest Rate Swap (IRS) using Bloomberg. I put in a notional amount in (USD) and a assigned 6MO USD LIBOR as the reference index for the ...
120 views
### Game theory and anta... | {} |
• Rohini M Godbole
Articles written in Pramana – Journal of Physics
• Resolved photon processes
We review high-energy scattering processes that are sensitive to the hadronic structure of the photon, describing theoretical predictions as well as recent experimental results. These processes include deep-inelastic elec... | {} |
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Beyond the Standard Model
A simplified model for dark matter interacting primarily with gluons.
G. Mendiratta,* R. Godbole, A. Shivaji, T.M.P. Tait
*corresponding author
Full text: pdf
Pre-published on: February 06, 2017
Published on: April... | {} |
# GMAT Math : Cylinders
## Example Questions
← Previous 1 3
### Example Question #1 : Calculating The Surface Area Of A Cylinder
What is the surface area of a cylinder with a radius of 7 and a height of 3?
Explanation:
All we really need here is to remember the formula for the surface area of a cylinder.
### Exa... | {} |
To build these speed tests, and run their correctness tests, execute the following commands starting in the build directory : cd speed/sacado make check_speed_sacado VERBOSE=1 You can then run the corresponding speed tests with the following command ./speed_sacado speed seed where seed is a positive ... | {} |
# A question regarding the algebraic closure of a field
I have slight problems understanding a thing about algebraic closures of fields. It seems to me that any algebraic closure $C$ of a field $K$ is a Galois extension, but I read that this is not true. Following are the definitions I use:
An extension $F/K$ is Galo... | {} |
# The Unapologetic Mathematician
## Symmetric Tensors
Wow, people are loving my zero-knowledge test. It got 1,743 views yesterday, thanks to someone redditing it. Anywho…
Today and tomorrow I want to take last Friday’s symmetrizer and antisymmetrizer and apply them to the tensor representations of $\mathrm{GL}(V)$, ... | {} |
×
# When Math meets CS: Counting Perfect Matchings using Inclusion Exclusion
I'm sure you've all heard of buzz-words like NP-Completeness and the like. They sound hard and unapproachable, so today let's solve one of the non-classical NP-Hard problems (in exponential time of course).
A graph, $$G$$, is basically a se... | {} |
Nonnegative matrix and tensor factorization (nmf, ntf) with any beta divergence in matlab
The following Matlab project contains the source code and Matlab examples used for nonnegative matrix and tensor factorization (nmf, ntf) with any beta divergence. function [W,H,Q, Vhat] = betaNTF(V,K,varargin) %-----------------... | {} |
Following up on the deep learning and toposes-post, I was planning to do something on the logic of neural networks.
Prepping for this I saw David Spivak’s paper Learner’s Languages doing exactly that, but in the more general setting of ‘learners’ (see also the deep learning post).
And then … I fell under the spell of... | {} |
Copied to
clipboard
G = C5×Dic3⋊4D4order 480 = 25·3·5
Direct product of C5 and Dic3⋊4D4
Series: Derived Chief Lower central Upper central
Derived series C1 — C6 — C5×Dic3⋊4D4
Chief series C1 — C3 — C6 — C2×C6 — C2×C30 — S3×C2×C10 — C10×C3⋊D4 — C5×Dic3⋊4D4
Lower central C3 — C6 — C5×Dic3⋊4D4
Upper central C1 — C... | {} |
# Edwards, Tangherlini, Selleri transformations and their inverse
1. Nov 4, 2008
### bernhard.rothenstein
Edwards, Tangherlini, Selleri propose synchrony parameter dependent transformation equations we have discussed here. Call them direct transformations. They also their inverse version. As I see they are not used.... | {} |
Université Paris 6Pierre et Marie Curie Université Paris 7Denis Diderot CNRS U.M.R. 7599 Probabilités et Modèles Aléatoires''
### Parametric inference for discretely observed non-ergodic diffusions
Auteur(s):
Code(s) de Classification MSC:
Résumé: We consider a multidimensional diffusion process $X$ whose drift and... | {} |
View Single Post
2020-10-23, 08:20 #19
ONeil
Dec 2017
F016 Posts
Quote:
Originally Posted by Viliam Furik That is not a misquote, you are simply talking nonsense. Primes are not composite, that is their definition. If you mean the Mersenne numbers... Those can be composite. Mersenne primes are a very rare special... | {} |
How To Use Total Concentration Breathing
This is the use of essential oils on hot compress, in diffusers, or in hot water for inhalation. Psychological research shows how you can easily and totally relax in a matter of seconds, using a method learn by playing this. 1152 at 10 o C to 0. Using cannabidiol sublingually pr... | {} |
# The CDF of determinant of wishart distribution
Assuming $$b>0$$, $$mathbf{A} in mathbb{C}^{mtimes n}$$ with $$mleq n$$ and each element of $$mathbf{A}$$ is i.i.d. $$mathcal{CN}(0,1)$$ distributed, how to obtain $$mathbb{P} left( detleft( mathbf{A}mathbf{A}^H right) < b right)$$? | {} |
The Carothers solution for a wedge loaded by a concentrated couple at its vertex is known to be valid for the wedge angles $2α<2α*≈257 deg$ only. Moreover, for $π<2α<2α*$ it exists for antisymmetric loading only. The more realistic model of the concentrated couple of the arbitrary orientation is examined by the approac... | {} |
Mathematics
OpenStudy (anonymous):
what would the domain of x/2-x be?
OpenStudy (anonymous):
did you mean, x/(2-x) or (x/2) - x
OpenStudy (anonymous):
is this $\frac{x}{x-2}$? if so all real numbers except 2
OpenStudy (anonymous):
because you still cannot divide by zero
OpenStudy (anonymous):
oh so do you only... | {} |
# Fullscreen functionality
This topic is 1824 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.
## Recommended Posts
Hey guys,
I am using C++ with the Allegro 5 library for my project, and I have come up against something that I cant find the solution to, it seems ... | {} |
# Products classification by name
I am a beginner with machine learning, and I'm trying to build a model to classify products by category according to the words present in the product name. My goal is to predict the category of some new product, just by observing the categories for existing products.
For example, havi... | {} |
# Derivative of a particular function
Under what conditions is the derivative of $$f(z) = (z-(x_1+iy_1))(z-(x_2+iy_2))(z-(x_3+iy_3))$$ equal to $3(z^2-13)$ where $i$ is the imaginary number? When I put the equation in Wolfram it's a huge mess and I am wondering if there's an easier simplification or mathematical point... | {} |
# Recent developments in the proof of fermat's last theorem
It's been 20 years since fermat's last theorem was proved by Andrew Wiles.
Has there been any simplification in proof in the last 20 years?
What I do only know is that different proofs of faltings's theorem were given by Vojta and Bombieri. | {} |
InfoQ Homepage News ELIoT: Distributed Programming for the Internet of Things
# ELIoT: Distributed Programming for the Internet of Things
ELIoT (Extensible Language for the Internet of Things) is a simple and small programming language aiming to make distributed programming easier. A program in ELIoT may appear as a ... | {} |
Acid catalysed hydration of allene
In the acid catalysed hydration of allene, acetone is obtained as the major product. This is because of electrophilic addition of $\ce{H+}$ across a double bond to give a vinyl carbocation, and subsequent addition of water and then tautomerism to yield the ketone. What I'm confused a... | {} |
1. May 16, 2006
### jet10
integral identity
if we have $$\int dt f(t) = \int dt g(t)$$ where both integrals are indefinite integrals, can we immediately conclude that f(t) = g(t) ? I know this doesn't work with definite integrals.
Last edited: May 16, 2006
2. May 16, 2006
### vsage
If the two integrals are equiva... | {} |
# Show that for a.e. $x\in[0,1]$, $\sum_{n=1}^\infty\sum_{k=1}^n\dfrac{1}{n^\gamma}\dfrac{1}{\sqrt{|x-\frac{k}{2^n}|}}$ converges.
One point to add, $$\gamma>2$$. My approach is to show its complement, i.e $$x$$ where the series is divergent, is measure zero by Borel-Cantelli lemma. Let $$A_{j,m}:=\{\sum_{n=1}^m\sum_{... | {} |
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... | {} |
# Plus One Computer Science Chapter Wise Questions and Answers Chapter 2 Data Representation and Boolean Algebra
Students can Download Chapter 2 Data Representation and Boolean Algebra Questions and Answers, Plus One Computer Science Chapter Wise Questions and Answers helps you to revise the complete Kerala State Syll... | {} |
# Area of a trapezoid from the area of triangles created by the diagonals
In the trapezoid $ABCD$ where $AB||CD$, $S$ is the point of intersection of the diagonals. What is the area of the trapezoid if the area of the triangles ADS and ABS is respectively 5 and 7?
I know that the areas of the ADS and the CBS are equa... | {} |
### April 2017
This is part 27 of Categories for Programmers. Previously: Ends and Coends. See the Table of Contents.
So far we’ve been mostly working with a single category or a pair of categories. In some cases that was a little too constraining. For instance, when defining a limit in a category C, we introduced an... | {} |
# Show Reference: "A Gentle Tutorial of the {EM} Algorithm and its Application to Parameter Estimation for Gaussian Mixture and Hidden Markov Models"
A Gentle Tutorial of the EM Algorithm and its Application to Parameter Estimation for Gaussian Mixture and Hidden Markov Models (April 1998) by Jeff A. Bilmes
@techrepor... | {} |
# $\cot{(90^°)}$ value
The cot value when angle of a right triangle equals to $90^°$ is called cot of angle $90$ degrees and it is written as $\cot{(90^°)}$ mathematically in sexagesimal system.
$\cot{(90^°)} \,=\, 0$
The exact value of $\cot{(90^°)}$ is zero mathematically.
## Alternative form
The $\cot{(90^°)}$ ... | {} |
# What is the origin of λ for empty string?
I usually use the symbol $\varepsilon$ for empty string (empty word or null string). But I know some people use $\lambda$ instead of $\varepsilon$.
I think $\varepsilon$ is derived from the word "Empty". However I don't know what's the origin of $\lambda$.
In automata theo... | {} |
Postman Cheat Sheet
PostmanREST APISOAP API
This Postman Cheat Sheet is based on the official documentation page of Postman (which is available in the below link) and from the overall knowledge on Postman −
https://learning.postman.com/docs/getting-started/introduction/
a. Variables
All the variables can be set up... | {} |
# Python – Sort by Maximum digit in Element
PythonServer Side ProgrammingProgramming
When it is required to sort by maximum digit in element, a method is defined that uses ‘str’ and ‘max’ method to determine the result.
Below is a demonstration of the same −
## Example
Live Demo
def max_digits(element):
return ma... | {} |
# The vanishing ideal $I_{K[x,y]}(A\!\times\!B)$ is generated by $I_{K[x]}(A) \cup I_{K[y]}(B)$?
Let $K$ be a field, $x=(x_1,\ldots,x_m)$, $y=(y_1,\ldots,y_n)$, $A\!\subseteq\!\mathbb{A}^m_K$, $B\!\subseteq\!\mathbb{A}^n_K$. Does there hold $$I_{K[x,y]}(A\!\times\!B)=\langle\langle I_{K[x]}(A) \cup I_{K[y]}(B)\rangle\... | {} |
Homework Help: Please check my work (differential equation)
1. Apr 12, 2010
darryw
1. The problem statement, all variables and given/known data
ty' + 2y = sin t (no initial conditions given)
2. Relevant equations
3. The attempt at a solution
ty' + 2y = sin t
y' + (2/t)y = sin t / t
mu(x) = e^integ(2/t) = t^2
(t... | {} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.