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Question
# Tangent drawn to the ellipse $$\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=1$$ at point $$'P'$$ meets the coordinate axes at point $$A$$ and $$B$$ respectively. Locus of mid-night of segment $$AB$$ is
A
x2a2+y2b2=2
B
a2x2+b2y2=2
C
a2x2+b2y2=4
D
x2a2+y2b2=4
Solution
## The correct option is A $$\dfrac {x^... | {} |
Least mean squares (machine learning algorithm)
This is the rule:
\begin{align*} \theta_j:=\theta_j+\alpha\sum_{i=1}^{m}(y^{(i)}-h_\theta(x^{(i)}))x_j^{(i)} \space (\forall j) \end{align*} I can't get the correct thetas, they quickly get to infinity or some very large numbers. My question is, for $\theta_0$, $x_0$ is ... | {} |
# Blackboard 2
is a simple math oriented presentation web application. It enables dynamic slide creation and manipulation in real time. can also be used as a traditional presentation software where the content of the slide is prepared before presentation
Next: , Up: (dir) [Contents]
Next: , Previous: , Up: Top [... | {} |
# Quizbank/Bell/152874216227
< Quizbank | Bell
Bell152874216227
### Bell:Bell1:V0
Bell152874216227
1) Your solitaire deck uses ♠ ♣ and your answer cards are 4 and 5. You select 4♠, 4♣, and 5. If the questions were Q♠ and Q♣, you would__
a) win 1 point
b) lose 3 points
c) lose 1 point
d) be disqualified for cheat... | {} |
# 1 US dry barrel in deciliters
## Conversion
1 US dry barrel is equivalent to 1156.27123584 deciliters.[1]
## Conversion in the opposite direction
The inverse of the conversion factor is that 1 deciliter is equal to 0.000864848980934415 times 1 US dry barrel.
It can also be expressed as: 1 US dry barrel is equal ... | {} |
# igraph Reference Manual
For using the igraph C library
Search the manual:
# Chapter 7. Data structure library: vector, matrix, other data types
Some of the container types listed in this section are defined for many base types. This is similar to templates in C++ and generics in Ada, but it is implemented via pre... | {} |
# zbMATH — the first resource for mathematics
##### Examples
Geometry Search for the term Geometry in any field. Queries are case-independent. Funct* Wildcard queries are specified by * (e.g. functions, functorial, etc.). Otherwise the search is exact. "Topological group" Phrases (multi-words) should be set in "strai... | {} |
# FUN-Veranstaltungen
FoFö-Stammtisch, 23. November 2017, 14 Uhr siehe Info-Veranstaltungen
# Kontakt
Abteilung Forschungsunterstützung (FUN):
forschen@jku.at
Die folgende Link-Liste enthält oft gesuchte Begriffe in alphabethischer Reihenfolge: Link-Liste nach Häufigkeit sortieren
# Forschungseinheiten
Hauptvortr... | {} |
zbMATH — the first resource for mathematics
Cardaliaguet, Pierre
Compute Distance To:
Author ID: cardaliaguet.pierre Published as: Cardaliaguet, Pierre; Cardaliaguet, P.
Documents Indexed: 121 Publications since 1992, including 4 Books
all top 5
Co-Authors
23 single-authored 15 Quincampoix, Marc 10 Cannarsa, Pie... | {} |
# ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT)
@article{Podio2020ALMACS,
title={ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT)},
author={Linda Podio and Antonio Garufi and Claudio Codella and Davide Fedele and Eugenio Bianchi and Francesca Bacciotti and Cecilia Ceccarelli and C{... | {} |
Broadcast // Operation that produces a tensor based on arg's axes
## Description¶
Operation whose output tensor ignores axes not in the arg tensor.
### Inputs¶
Name Element Type Shape
arg Any Any
### Attributes¶
Name Type Notes
shape Shape The shape of the output.
broadcast_axes AxisSet Axis positions in shape ... | {} |
# Converting string date to date object and retriving time difference
I am manipulating a text file, I need to extract dates from it, that will be in the format
XJan__28_,__2020X
where
_ is either 1 or zero whitespaces __ is 1 or more than 1 whitespaces X is a combination of 0 or more whitespaces and 0 or 1 newline... | {} |
+0
# In the card game bridge, each of 4 players is dealt a hand of 13 of the 52 cards. What is the probability that each player receives exactly
+5
2966
3
In the card game bridge, each of 4 players is dealt a hand of 13 of the 52 cards. What is the probability that each player receives exactly one Ace? (You may use ... | {} |
## On the Average Value of Correlated Time Series, with Applications in Dendroclimatology and Hydrometeorology
• Wigley T
• Briffa K
• Jones P
• 259
Readers
• 1.6k
Citations
#### Abstract
Abstract In a number of areas of applied climatology, time series are either averaged to enhance a common underlying signal or... | {} |
# Syncing the Desktop and the Laptop
For the past few years, I have been working about 5½ days a week on the desktop and 1½ days a week on the laptop. The desktop is a monster 8-core Mac Pro with loads of RAM and my good old 23" Cinema HD Display, which makes it perfect for compiling, graphics work and the usual day-t... | {} |
The fmt() function provides a way to execute custom formatting functionality with raw data values in a way that can consider all output contexts.
Along with the columns and rows arguments that provide some precision in targeting data cells, the fns argument allows you to define one or more functions for manipulating t... | {} |
## Missyxo 3 years ago Use the diagram to find sin X as a fraction in simplest form. A. 3/4 B. 4/5 C. 3/5 D. 4/3
1. Missyxo
2. abdul_shabeer
$\sin \theta = opposite/hypotenuse$
3. abdul_shabeer
What is opposite/hypotenuse?
4. Missyxo
I don't know.
5. Mertsj
|dw:1336147215890:dw|
6. Missyxo
7. Mertsj
What is... | {} |
Find all School-related info fast with the new School-Specific MBA Forum
It is currently 16 Mar 2014, 15:22
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized... | {} |
## My, what a tangled web we weave
Hi, my name is Eitan. I’m a student of mathematics. Welcome to my personal blog. I intend to post mathematical exposition, but since this is a personal blog I will also post political thoughts or anything else that comes to mind. Let’s start with some math.
What’s a tangle? Tangles ... | {} |
# What is the function rule for the following relationship: f(2)=8, f(4)=12, f(6)=16?
One example would be $f \left(x\right) = 2 x + 4$. | {} |
# How does Ohm's law extend to Z if Z is complex?
We know that impedance, Z, is complex.
I'm told that $$V = IZ$$ But that rearranges to $$Z = \frac{V}I$$
But both voltage and current are real numbers, so how can a real number divided by another real number give a complex number? What have I done wrong?
• V and I i... | {} |
# Semiparametric Contextual Bandits
This paper studies semiparametric contextual bandits, a generalization of the linear stochastic bandit problem where the reward for an action is modeled as a linear function of known action features confounded by an non-linear action-independent term. We design new algorithms that a... | {} |
# Fluid Mechanics: Friction of a moving surface
1. Oct 5, 2013
### Nikitin
Hey! So for newtonian fluids, the shear-stress is given by
$$\tau = \mu \frac{du}{dy}$$
Now, let's assume you have water flowing horizontally in laminar steady state motion, where its surface is also moving. Above it is air. So if we disrega... | {} |
# New Ultralight and LSA Trainer design PAIR
## What is your interest/input in such a project?
• ### I think that this is a pipe dream, and you're wasting your time.
• Total voters
25
#### Inverted Vantage
##### Formerly Unknown Target
But it was reiterated several times that this aircraft should not be designed f... | {} |
# Bio
I’m a research scientist at Samsung AI Center in Cambridge, UK. Before joining Samsung, I did a postdoc at Inria Sierra with Alexandre d’Aspremont and Francis Bach. I received my PhD in computer science from KAUST, where I worked under the supervision of Peter Richtárik on optimization theory and its application... | {} |
# Pixel Shader, YUV-RGB Conversion failing
I am tasked with playing back a video hthat comes in in a YUV format as an overlay in a larger game. I am not a specialist in Direct3d, so I am struggling. I managed to get a shader working and am rendering 3 textures (Y, V, U). Sadly I am totally unable to get anything like ... | {} |
2018 Thematic Program (II)
### SPDEs driven by fractional Brownian motion:existence and stability results
#### ABSTRCT
In this minicourse we will first study the existence and uniqueness of solutions of equations driven by Hölder continuous functions, for which we will make use of tools of Fractional Calculus. Remar... | {} |
# Technical Debt in the Peer-Review Documentation of R Packages: a rOpenSci Case Study
### Abstract
Context: Technical Debt (TD) is a metaphor used to describe code that is not quite right. Although TD studies have gained momentum, TD has yet to be studied as thoroughly in non-object-oriented or scientific software s... | {} |
# Detect and isolate veins in the palm?
I am trying to figure out a way to find out the vein pattern in the hand.. Please could someone suggest ways to do the same.? I know first i would need to find the ROI in the image and perform further processing .. Can gabor filter be used as one of the steps ?
Thanks
• See re... | {} |
# Anybody has experience with the NuvoH2O no salt softener?
We have very hard water here in Texas and we learned that a salt softener will ruin our septic tank. We found a lot of advertising about this NuvoH2O that would cost about $700 or only like 30 dollars a month to buy. I’d be grateful for some feedback before w... | {} |
# Integrating IoT and IoS with a Component-Based approach
1 TRISKELL - Reliable and efficient component based software engineering
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique
Abstract : There is a growing interest in leveraging Service Oriented Architectures... | {} |
×
Consider the titration of 100 ml of 0.1 M HCl with 0.1 M NaOH. Calculate the pH of the solution at the following stages: ?
At the beginning, when no $N a O H$ is added When $50$ $m l$ of $0.1$ $M$ is added When $98$ $m l$ of $0.1$ $M$ is added When $99.9$ $m l$ of $0.1$ $M$ is added When $100$ $m l$ of $0.1$ $M$ is... | {} |
# Triangular number
Ten pebbles arranged into a triangle
A triangular number is a number that is the sum of all of the natural numbers up to a certain number. When formed using regularly spaced dots, they tend to form a shape of equilateral triangle, hence the name.[1]
For example, 10 is a triangular number because ... | {} |
# The model argument
Filter Content By
Version
Languages
### The model argument
Model variables store optimization problems (as described in the problem statement).
Models can be built in a number of ways. You can populate the appropriate named components of the model list using standard R routines. You can also re... | {} |
# zbMATH — the first resource for mathematics
Improved algorithms for finding level ancestors in dynamic trees. (English) Zbl 0973.68665
Montanari, Ugo (ed.) et al., Automata, languages and programming. 27th international colloquium, ICALP 2000, Geneva, Switzerland, July 9-15, 2000. Proceedings. Berlin: Springer. Lect... | {} |
## Overview
Bootable system, for example Linux, from USB allows:
• Test out system desktop environment without touching PC configuration
• Boot into system on a borrowed machine or from an internet cafe
• Use tools installed by default on the USB stick to repair or fix a broken configuration
Rufus 3.0.1304
## USB s... | {} |
# Approved edit that makes question *less* readable
I recently encountered the following edit of a question: https://math.stackexchange.com/revisions/4126525/2
I hope everyone here agrees that the edit is not appropriate. A minor thing is that editing "fi" to $$fi$$ is not really helping the question, and the correct... | {} |
# How to draw a commutative diagram?
Is it possible to draw a (simple) commutative diagram using MathJax?
Amscd doesn't seem to work here on math.SE.
M(N)WE:
$$\begin{CD} K(X) @>{ch}>> H(X;\mathbb Q);\\ @VVV @VVV \\ K(Y) @>{ch}>> H(Y;\mathbb Q); \end{CD}$$
Edit: [A.K. May 7, 2013]
As pointed elsewhere by Davide, ... | {} |
# Categorical interpretation of quasi-compact quasi-separated schemes
Let $X$ be a scheme. Consider the global section functor $\Gamma : \mathrm{Qcoh}(X) \to \mathrm{Ab}$. It is well-known that $\Gamma$ preserves filtered colimits if $X$ is assumed to be quasi-compact and quasi-separated. In other words, $\mathcal{O}_... | {} |
# Dealing with multicollinearity of explanatory variables in panel regression when the usual remedies fail
I am regressing firm characteristics on some stock trading-related measures in a panel dataset. Firm size is a highly significant control variable, independent of the estimation method etc. My focus variables are... | {} |
# How do you simplify ((x^2-25 )/(x^2+6+5))/(x / x^2)?
Jul 27, 2016
$\frac{x \left(x - 5\right)}{\left(x + 1\right)}$
#### Explanation:
In this form, the fraction just looks nasty!!
We can write $\frac{\frac{\textcolor{red}{a}}{\textcolor{b l u e}{b}}}{\frac{\textcolor{b l u e}{c}}{\textcolor{red}{d}}}$ in the muc... | {} |
# Analysis of variance (ANOVA)
### Analysis of variance (ANOVA)
#### Lessons
Recall:
$\sigma^2=\frac{(x_1-\mu)^2+(x_2-\mu)^2+ \cdots (x_n-\mu)^2}{n}$
$\overline{x}=\frac{x_1+x_2+ \cdots +x_n}{n}$
Degrees of Freedom
The degrees of freedom for a calculation is the number of variables that are free to vary. Think of ... | {} |
### Matrix Functions in PROC MCMC
The MCMC procedure provides you with a number of CALL routines for performing simple matrix operations on declared arrays. With the exception of FILLMATRIX, IDENTITY, and ZEROMATRIX, the CALL routines listed in Table 55.43 do not support matrices or arrays that contain missing values.... | {} |
Expected Value of Discrete Distribution Formula
The population mean, sometimes called the expected value, describes where a probability distribution is centered. The variable represents the population mean, represents the data in the sample space, and is the probability of occuring. | {} |
## I will drive Adsense safe real quality web traffic for \$5
#### I will drive Adsense safe real quality web traffic
********WELCOME TO TRAFFICTOP09 MY GIG*******
High Quality Search Visitors
Get high quality search visitors to your links. Both category and keyword targeting is
supported. People who match the sea... | {} |
# Article
Thermophysical Properties of Materials
2007. V. 45. № 5. P. 628–631
Fakhretdinov I.A., Zhdanov E.R.
An investigation of metastable states of binary mixtures in the neighborhood of spinodal using the integral equation method
Annotation
A generating functional is suggested for the purpose of producing a set of... | {} |
# Why does the chain rule work?
The chain rule is used to differentiate composite function, which are something of the form $f \left(g \left(x\right)\right)$. The rule states that the derivative of such a function is the derivative of the outer function, evaluated in the inner function, times the derivative of the inn... | {} |
# PointPackage R¶
This package undocumented
color: Point R -> R
color(pt) returns the fourth element of the point, pt, although no assumptions are made with regards as to how the components of higher dimensional points are interpreted. This function is defined for the convenience of the user using specifically, colo... | {} |
# Does the GCD of a set divide the GCD of any subset?
## Homework Statement
If A is a set of integers and B is a set properly contained in A, does the greatest common denominator of all of the integers in A divide the greatest common denominator of all elements in B?
None.
## The Attempt at a Solution
Obviously gc... | {} |
Browse Questions
# The distance between the foci of the hyperbola $x^2-3y^2-4x-6y-11=0$ is
$\begin {array} {1 1} (1)\;4 & \quad (2)\;6 \\ (3)\;8 & \quad (4)\;10 \end {array}$
Can you answer this question?
(3) 8
answered Nov 7, 2013 by | {} |
# KEPLERSLAW - Editorial
Setter: Srikkanth R
Tester: Venkata Nikhil Medam, Tejas Pandey
Editorialist: Kanhaiya Mohan
Cakewalk
None
# PROBLEM:
Kepler’s Law of Period states - “The square of the time period of the planet is directly proportional to the cube of the semimajor axis of its orbit.”
Given the Time period... | {} |
# Differentiation of a complex-valued function of a real variable
Let $f:[a,b] \to \mathbb{C}$ be a complex-valued function of a real variable. Say $f(t) = u(t) + i v(t)$. Then we define the derivative of $f$ at $t \in [a,b]$ by
$$f'(t) := u'(t) + i v'(t),$$
with one-sided derivatives understood for $t \in \{a, b\}$... | {} |
By adamant, 8 years ago, translation,
Hi everyone! I was always wondered how cleverly interwoven so-called string algorithms. Six months ago I wrote here article about the possibility of a rapid transition from Z-function to prefix-function and backward. Some experienced users already know that such transitions are po... | {} |
## Search
Institute for Advanced Simulation (IAS)
# General FAQs
Performance Breakdowns on higher Core Numbers
In case you would like to optimize the performance of your application or you observe performance breakdowns on higher core numbers please test the following scenario:
The variable PSP_ONDEMAND influences... | {} |
# Can real-time deterministic multicounter automata recognize the marked palindrome language?
Consider the marked palindrome language which is defined as MPAL=$\{ w\#w^r | w \in \{a,b\}^* \}$.
It is easy to recognize MPAL using only a single stack.
My question is whether MPAL can be recognized by a real-time determi... | {} |
# Math Help - What are the eigenvalues and eigenvectors of the following matrix?
1. ## What are the eigenvalues and eigenvectors of the following matrix?
$\begin{pmatrix} \frac{5}{200} & \frac{-5}{200} \\ \frac{-5}{200} & \frac{5}{200} \end{pmatrix}$
2. What ideas have you had so far? | {} |
1. Solving Radical Equations
Hi,
I can't solve this radical equation, can someone help?
8³√x+3 =11
Incase someone has a hard time reading that, because I know, sometimes I do, it says eight, cube root, x+3=11. The x+3 is inside the cube root, but the 11 is not.
x=4, but I don't know how the person who told me got ... | {} |
# Question #0711c
$v = \frac{\lambda}{T}$
Where $\lambda$ is the wavelength and $T$ the period;
$v = \frac{0.06}{0.1} = 0.6 \frac{m}{s}$ | {} |
References of "Article" in Complete repository Arts & humanities Archaeology Art & art history Classical & oriental studies History Languages & linguistics Literature Performing arts Philosophy & ethics Religion & theology Multidisciplinary, general & others Business & economic sciences Accou... | {} |
# Question #57644
Jul 18, 2017
$\frac{3}{4} {b}^{2}$
#### Explanation:
$\text{the square of b is expressed as } {b}^{2}$
$\frac{3}{4} \text{ of this value is }$
$\frac{3}{4} {b}^{2} \text{ or } \frac{3 {b}^{2}}{4}$
Jul 18, 2017
$\frac{3 {b}^{2}}{4}$
#### Explanation:
Three fourths means the same as three quar... | {} |
# Cosine Similarity: Works with TF-IDF Vectors OR with Probability Vectors?
Using Cosine Similarity is a common method to calculate Semantic Textual Similarity. And it is particularly useful when comparing Sentence Embeddings provided by the Universal Sentence Encoder.
However, the loss function used for training the... | {} |
Math Help - Optimization
1. Optimization
I've tried to figure these out, but I'm really confused. Sorry there are so many, but I would really appreciate it if someone could help me to understand them. Thanks.
Which of the following should be used to minimize the lateral surface area of a cone, where the volume of th... | {} |
Home > Standard Error > Standard Error Standard Deviation Divided By Square Root
# Standard Error Standard Deviation Divided By Square Root
## Contents
Browse other questions tagged statistics statistical-inference or ask your own question. Journal of the Royal Statistical Society. I had found in a previous part of ... | {} |
# Why does ConTeXt sometimes ignore surrounding font properties?
I am working on a document which contains a wide range of font styles and sizes. I am using commands such as \ss to change to sans serif, \tfa to set the font size to size "a", and \bf to make text boldface. I am also using brackets to define which areas... | {} |
# CHOLMOD implementation
I am working on a domain decomposition code in C that uses CHOLMOD to approximate grid values for a PDE in each sub-domain. The issue I have is that the methods use Matrix Market format, which is not an issue in general, but I already have a method that computes a 2D array which is the sparse ... | {} |
## Lecture Notes 2
### Lecture 2 - FOPDT Models from Data
Lecture 1 introduced FOPDT models. This next lecture covers techniques for obtaining FOPDT models from measurements. It is important to gain an intuitive understanding of gain, time constant, dead time before studying systems in the Laplace domain. | {} |
# How to linearize a weighted maximum coverage problem?
Is it possible that the binary variables below be modeled as continuous variables?
\begin{alignat}2\max&\quad\sum _{{e\in E}}w(e_{j})\cdot y_{j}\\\text{s.t.}&\quad\sum {x_{i}}\leq k,\quad&(\text{no more than}\,\,k\,\,\text{sets are selected})\\&\quad{\sum _{e_{j... | {} |
# FRAMES OF REFERENCE: THE BASICS
Students examine the concept of frames of reference in physics: that two frames of reference, each moving with respect to the other with a constant velocity v, observe the same accelerations and therefore Newton's laws are the same in both.
Concepts
Resource Details | {} |
# On-line Prediction Protocol
The simplest version of the on-line prediction protocol is where Nature outputs observations in the IID fashion. After Forecaster predicts an observation, it is added to the training set, which keeps growing. When each observation consists of an object and its label , the protocol looks a... | {} |
## Algebra 1: Common Core (15th Edition)
Published by Prentice Hall
# Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Practice and Problem-Solving Exercises - Page 36: 80
#### Answer
Rational numbers, integers, whole numbers, natural numbers.
#### Work Step by Step
The number $\sqr... | {} |
# Adding space in ToC between the part number and part title
I am running into some formatting trouble with memoir and the \part commands. In the table of contents, as the number of parts add up, the space between the part number, i.e. "III" and the part heading, i.e. "Background", gets smaller.
Is there a way of add... | {} |
Force is an agent capable of producing acceleration and/or deformation of a body.
## The Different Types of Forces
Typical forces that appear in mechanical problems can be understood as follows:
Net force $$(\vec{F}_{net})$$
When several forces act simultaneously on a particle, they can be replaced by a single force... | {} |
# Preprint: Non-linear noise excitation of intermittent stochastic PDEs and the topology of LCA groups
## Davar Khoshnevisan and Kunwoo Kim
Abstract. Consider the stochastic heat equation $$\partial_t u = \mathscr{L}u + \lambda\sigma(u)\xi$$, where $$\mathscr{L}$$ denotes the generator of a Lévy process on a locally ... | {} |
This book is in Open Review. We want your feedback to make the book better for you and other students. You may annotate some text by selecting it with the cursor and then click the on the pop-up menu. You can also see the annotations of others: click the in the upper right hand corner of the page
## 12.5 Where Do Vali... | {} |
### [本文链接：http://www.cnblogs.com/breezedeus/p/3775316.html，转载请注明出处]
#### Bandits for Recommendation Systems
06/02/2014 • Topics: Bayesian, Big data, Data Science
This is the first in a series of three blog posts on bandits for recommendation systems.
In this blog post, we will discuss the bandit problem and how it ... | {} |
# What positive integers has exactly n divisors, for n from 1 to 5
The question is :
What positive integers has exactly (and prove your result) (a) one positive divisor; (b) two positive divisors; (c) three positive divisors; (d) four positive divisors; (e) five positive divisors.
I think that,
for (a), the answer ... | {} |
By pikmike, history, 6 weeks ago, translation, ,
Hello Codeforces!
Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.
This round will be rated for the participants wi... | {} |
# Simpson's Rule
1. Oct 10, 2007
### Lanza52
Let a0, a1, a2, a3 be arbitrary real numbers, and let
f(x) = a0 + a1*x + a2*x^2 + a3*x^3
Show that the approximating the integral $$\int f(x)dx$$[/tex] ( Couldn't figure out the bounds using latex but the integral is from pi to 42) with Simpson's rule yields the exact v... | {} |
# Random point within a space at a distance of r
I have n dimensional space. Let us say n=20 for your case. And I also have a point p1 in that space.
What I want to do is get a random point (newpoint) in that space such that distance(p1, newpoint)<=r, where r represents radius that I already know.
Thank you. Any fee... | {} |
# Example of a compact operator that is not uniformly continuous. [Solved]
I want to find a Banach space $$E$$ and a compact operator $$K:[0,1]\times E \rightarrow E$$ (that is, $$K$$ maps every bounded sequence onto a sequence that converges up to a subsequence) satisfying the following conditions:
1. $$K(0,\cdot) =... | {} |
# The probability of an impossible event is
Question:
The probability of an impossible event is
(a) 0
(b) 1
(c) 1/2
(d) non-existent
Solution:
GIVEN: 4 options of probability of some events
TO FIND: Which of the given options is the probability of impossible event?
We know that, probability of an impossible e... | {} |
MathSciNet bibliographic data MR1967700 42B15 (42B20 43A22) Lin, Chin-Cheng Hörmander's \$H\sp p\$$H\sp p$ multiplier theorem for the Heisenberg group. J. London Math. Soc. (2) 67 (2003), no. 3, 686–700. Article
For users without a MathSciNet license , Relay Station allows linking from MR numbers in online mathematica... | {} |
[This article was first published on R – What You're Doing Is Rather Desperate, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
“‘Demographic tsunami’ will keep Sydney, Melbo... | {} |
# A hard definite integral with trigonometric functions
How could we get a closed form for this one? $$\displaystyle\int_{0}^{\frac{\pi }{2}}{{{x}^{2}}\sqrt{\tan x}\sin \left( 2x \right)\text{d}x}$$
-
Why do you expect there to be one? A quick numeric computation and a look at the inverse symbolic calculator gives no... | {} |
## Seminars and Colloquia Schedule
Monday, April 15, 2019 - 11:15 , Location: Skiles 005 , L. Serdukova , School of Mathematics, Georgia Institute of Technology , Organizer: Larissa Serdukova
Stability and bifurcation conditions for a vibroimpact motion in an inclined energy harvester with T-periodic forcing are dete... | {} |
Sound and temperature
1. Jan 10, 2005
JohanL
How does the velocity of sound depend on the temperarure.
If you set up a simple model of a linear lattice with nearest neighbour
interaction only you get the dispersion relation:
w^2=4c/M * sin^2 (0.5ka)
and v=w/k.
where a is the spacing between atoms, c is the force c... | {} |
# Talk:Twin prime
WikiProject Mathematics (Rated C-class, Mid-importance)
This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of Mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a... | {} |
# Density Confidence Interval
Density estimation belongs with the literature of non-parametric statistics. Using simple bootstrapping techniques we can obtain confidence intervals (CI) for the whole density curve. Here is a quick and easy way to obtain CI’s for different risk measures (VaR, expected shortfall) and usi... | {} |
# What is the relation between convexity and positive semi-definite Hessian Matrix?
While studying maximum likelihood estimation for linear regression, I followed all the contents and mathematical steps and understand the way steps were derived. At the end of the context, the book says we take the second derivative to... | {} |
# Number of $75\leq n\leq 300$ not divisible by any of $9,12,15$ - check work
I need to find the number of $75\leq n\leq 300$ not divisible by any of $9,12,15$.
I thought about to solve this for $1\leq n\leq 300$ and $1\leq n\leq 74$ and then subtract. For each of them I thought to use inclusion-exclusion. I just wan... | {} |
# How did the term “Michel electron” come about?
The Michel electron is what we call the electron produced from muon decay, and it's named after Louis Michel. I mention this in a paper I'm writing, and I was told that I need to cite it. I can't find anything that explains the origin of the name, much less a paper that... | {} |
Construction of three tangent circles in a triangle
Given a triangle I want to construct three tangent circles inscribed in the triangle (every two sides of the triangle are tangent lines of one of the circles). For better understanding of the problem I tried to draw desired result (picture is only approximative, I do... | {} |
# equation solving – Finding the coefficients of an expression
I have a set of formulas of the following form:
``````{5.1011 + E^(-6876.32 t) (-5.1011 + 1. x),
5.28335 + E^(-4868.36 t) (-5.28335 + 1. x),
6.45616 + E^(-1847.14 t) (-6.45616 + 1. x),
144.165 + E^(-34.6815 t) (-144.165 + 1. x),
320. + E^(-15.6055 t) (-32... | {} |
# A Primer on Mathematical Modeling in the Study of Organisms and Their Parts
Systems Biology
How do mathematical models convey meaning? What is required to build a model? An introduction for biologists and philosophers.
Montévil, Maël. 2018. “A Primer on Mathematical Modeling in the Study of Organisms and Their Par... | {} |
## Online Course Discussion Forum
### MC II-A HW Questions
MC II-A HW Questions
1) Regarding this week's HW, I'm not sure how to do 9.19 and 9.25.
2) Also, regarding last week's hw, I'm wondering if my hw was regraded because I didn't see a change with the grades.
Thank you! Happy early Veteran's Day!
Re: MC II-A... | {} |
# Ben's Corner
View page source on GitHub
# Setting Up Static IPs and DNS
I want machines on my network to be able to talk to each other via hostnames (fqdns). Here’s how I set that up.
## Router
On my local router (a TP-Link Archer C3150), I set up static IPs for each device. The right menu is located from
Advan... | {} |
# Given a sequence of Lp functions, does the integral commute with the lp norm?
I have been struggling to prove the following:
Let $$\{ f_n \}$$ be a sequence in $$L^p(E)$$ for some $$p \geq 1$$. Then,
$$\left( \sum_{n=1}^\infty | \int_E f_n \mathrm{d}\mu |^p \right)^{ \frac{1}{p}} \leq \int_E \left( \sum_{n=1}^\inf... | {} |
# 2281
Previous ... Next
## Number
$2281$ (two thousand, two hundred and eighty-one) is:
The $339$th prime number
The index of the $17$th Mersenne prime after $2$, $3$, $5$, $7$, $13$, $17$, $19$, $31$, $61$, $89$, $107$, $127$, $521$, $607$, $1279$, $2203$:
$M_{2281} = 2^{2281} - 1 \approx 4 \cdotp 461 \times 10... | {} |
# American Institute of Mathematical Sciences
March 2018, 38(3): 1553-1565. doi: 10.3934/dcds.2018064
## On the universality of the incompressible Euler equation on compact manifolds
UCLA Department of Mathematics, Los Angeles, CA 90095-1555, USA
Received July 2017 Published December 2017
The incompressible Eu... | {} |
## Precalculus (6th Edition) Blitzer
The two consecutive asymptotes occur at $\left( x+\frac{\pi }{2} \right)=0\text{ and }\left( x+\frac{\pi }{2} \right)=\pi$. We solve $\left( x+\frac{\pi }{2} \right)=0$ to get \begin{align} & \left( x+\frac{\pi }{2} \right)=0 \\ & x=\left( 0-\frac{\pi }{2} \right) \\ & x=-\frac{\pi... | {} |
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