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# LEDs in Parallel != sum of expected current draw?
#### mordhau5
Joined Sep 19, 2012
6
Hey guys, long time lurker, first-time poster!
I am attempting to create a loong string of non-HP, T-1 3mm LEDs as they would make great spotlights for an Amiibo (little plastic figures) shelf I'm building. I ordered 25 of these ... | {} |
# Calculate the Taylor expansion of a function
## Calculus taylor_series_expansion
Calculus in processing ... please wait
### Function : taylor_series_expansion
#### Summary :
The taylor series calculator allows to calculate the Taylor expansion of a function.
Taylor_series_expansion online
#### Description :
T... | {} |
## Disclaimer
First time I wrote more than a one-liner in Perl, the Swiss Army chainsaw of scripting languages. After quickly skimming the beginner's tutorial, (and no longer just copying Perl one-liners from Stackoverflow and friends), I consider myself ready to write porting helpers for kde-dev-scripts.git! Hey!
If... | {} |
Search…
⌃K
accTOKE
Introduction
The locking of TOKE as accTOKE gives users the ability to participate in the weekly accTOKE Cycle rewards. Rewards accrued by the Tokemak POA deployments are claimable in wETH by accTOKE lockers. Demonstrations on how to lock TOKE as accTOKE can be found here.
accTOKE Locked Staking
... | {} |
# Remember torques?
A hollow shaft has an inner diameter of 0.035 m and an outer diameter of 0.06 m. Compute the torque (In N*m) if the shear stress is not to exceed 120 Mpa.
× | {} |
sin(cosx)=0
• March 21st 2010, 05:15 PM
Chinnie15
sin(cosx)=0
I need to prove sin(cosx)=0, but I'm looking through all of my identities and none of them seem to fit? Any help on this would be great!
Thank you!
Brittney
• March 21st 2010, 05:39 PM
skeeter
Quote:
Originally Posted by Chinnie15
I need to prove sin(cosx... | {} |
# Math Help - Periodicity of a function
1. ## Periodicity of a function
Hello. I need some help on solving the following problem
Review the periodicity of the following function:
$f(x)=x+\frac{2x}{x^2-1}$
2. Originally Posted by javax
Hello. I need some help on solving the following problem
Review the periodicity... | {} |
## anonymous 5 years ago Finding a power series representation for the function f(x)=3/(1-x^4) and determining the interval of convergence. So far ive gotten to 3sigma (-1)^n (x^(4n)+1)/(4n+1)
1. anonymous
$3\sum_{n=0}^{\infty} (-1)^n ((x^(4n+1)/(4n+1)$
2. anonymous
) | {} |
# align two piecewise functions
I have problem with my piecewise functions
I read others post and I tried this but I have errors
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
$x_{{i}{j}}$ =
&\begin{cases}
\text{1,} &\quad\text{Si se envía agua desde área i ( i $\in$ \{1,2,3,4,5,6,7,8... | {} |
# Towards a Dual Representation of Lattice QCD
@article{Gagliardi2018TowardsAD,
title={Towards a Dual Representation of Lattice QCD},
author={G. Gagliardi and W. Unger},
journal={arXiv: High Energy Physics - Lattice},
year={2018}
}
• Published 2018
• Physics
• arXiv: High Energy Physics - Lattice
Our knowledge about t... | {} |
# Sample Standard Deviation Calculator
Instructions: In order to use this sample standard deviation calculator (SD), please provide the sample data below and this solver will provide step-by-step calculation:
Type the sample (comma or space separated)
Name of the variable (Optional)
The sample standard deviation (us... | {} |
MathOverflow will be down for maintenance for approximately 3 hours, starting Monday evening (06/24/2013) at approximately 9:00 PM Eastern time (UTC-4).
A slightly different way to prove Francesco+auniket's result is as follows. First, given two different planes in the family, all $d$ points must lie in their intersec... | {} |
## Elementary Technical Mathematics
$\frac{23}{6}$
We change to an improper fraction: $3\displaystyle \frac{5}{6}=\frac{3*6+5}{6}=\frac{23}{6}$ | {} |
# Independence of $\ell$ and local terms
Joint IAS/Princeton University Number Theory Seminar Topic: Independence of $\ell$ and local terms Speaker: Martin Olsson Affiliation: University of California, Berkeley Date: Thursday, November 14 Time/Room: 4:30pm - 5:30pm/S-101 Video Link: https://video.ias.edu/jointiasnts/... | {} |
Definitions
Nearby Words
# line integral
In mathematics, the integral of a function of several variables defined on a line or curve that has been expressed in terms of arc length (see length of a curve). An ordinary definite integral is defined over a line segment, whereas a line integral may use a more general path,... | {} |
# Displaying hierarchical comments for movies
I have written a function which fetches all comments for a given movie. Since comments can be nested (e.g. someone replied to a comment) I am fetching them recursively (based on the parent comment id). Currently, my function looks like this:
<?php
$movieid =$this->movieid... | {} |
### HETEROGENEOUS MULTISCALE METHOD FOR OPTIMAL CONTROL PROBLEM GOVERNED BY ELLIPTIC EQUATIONS WITH HIGHLY OSCILLATORY COEFFICIENTS
Liang Ge1, Ningning Yan2, Lianhai Wang3, Wenbin Liu4, Danping Yang5
1. 1. School of Mathematical Sciences, University of Jinan, Jinan 250022, China;
2. Institute of Systems Science, Acad... | {} |
View Single Post
P: 13 1. The problem statement, all variables and given/known data Integrate the following: (sin(x)/x)^4 between negative infinity and infinity. 2. Relevant equations The residue theorem, contour integral techniques. The answer should be 2pi/3 3. The attempt at a solution I'm not even sure where to st... | {} |
## let A be the non-singular square matrix of order 3×3 then |adj A|is equal to
Question
let A be the non-singular square matrix of order 3×3 then |adj A|is equal to
in progress 0
1 month 2021-08-14T01:39:57+00:00 1 Answer 0 views 0 | {} |
# Impact of outward FDI on firms’ productivity over the food industry: evidence from China
Ting-gui Chen (School of Economics and Management, Shanghai Ocean University, Shanghai, China)
Gan Lin (School of Economics and Management, Shanghai Ocean University, Shanghai, China)
Mitsuyasu Yabe (Laboratory of Environmental ... | {} |
# Is Newton's applicable here too?
Algebra Level 4
$\large { \begin{cases} { a+b =1} \\ {ax+by=2}\\ {ax^{2}+by^{2}=-6}\\ {ax^{3}+by^{3}=8}\\ \end{cases} }$ We are given that $$a,b,x,$$ and $$y$$ are complex number that satisfy the system of equations above.
if $$ax^{2015}+by^{2015}$$ can be written as $$p\cdot q^{r}... | {} |
# Discrete Mathematics and Combinatorics Commons™
## All Articles in Discrete Mathematics and Combinatorics
1,081 full-text articles. Page 1 of 42.
Unomaha Problem Of The Week (2021-2022 Edition), 2022 University of Nebraska at Omaha
#### Unomaha Problem Of The Week (2021-2022 Edition), Brad Horner, Jordan M. Sahs
... | {} |
64 588
Assignments Done
99,2%
Successfully Done
In September 2018
# Answer to Question #63265 in Macroeconomics for Aisha
Question #63265
You are given the following information about the commodity and Money markets of a closed economy without government intervention.
The commodity market
Consumption function: C = 5... | {} |
# Langlands–Shahidi method
(Redirected from Langlands-Shahidi method)
In mathematics, the Langlands–Shahidi method provides the means to define automorphic L-functions in many cases that arise with connected reductive groups over a number field. This includes Rankin–Selberg products for cuspidal automorphic represent... | {} |
# How is any kind of structural reliability achieved if the probability of annual wind speed exceedance is 0.02?
Above is the definition of fundamental basic wind velocity from Eurocode 1. According to its instructions, wind loads on building are supposed to be calculated based on this velocity. It says that this velo... | {} |
# Re: [R] Font settings in xfig
From: Scionforbai <scionforbai_at_gmail.com>
Date: Fri, 16 May 2008 14:56:57 +0200
> Is there a reason you are going through this route to get figures > into LaTeX instead of using postscript (or PDF for pdflatex)?
To have LaTeX-formatted text printed onto your pdf figures, to include... | {} |
RUS ENG JOURNALS PEOPLE ORGANISATIONS CONFERENCES SEMINARS VIDEO LIBRARY PACKAGE AMSBIB
General information Latest issue Archive Search papers Search references RSS Latest issue Current issues Archive issues What is RSS
Dokl. Akad. Nauk: Year: Volume: Issue: Page: Find
MATHEMATICS Spectral decompositi... | {} |
What effect does cold weather have on helicopter performance?
Recently I was flying around my RC helicopter on a 40 $^\circ$F (4$^\circ$C).
At some point in the flight the rotor just stopped moving in mid-air and then I regained control back at ground level. I never had any issues before in warmer weather, so I assum... | {} |
# Mass of grain of sand
#### scc
1. Homework Statement
Fine grains of beach sand are assumed to be spheres of radius 38.1 micro meters (can't figure out the scientific sign). These grains are made of silicon dioxide which has a density of 2600 kilograms/meters^3. What is the mass in kg?
2. Homework Equations
3. The... | {} |
# Is Latex Flammable? And Biodegradable? (Truth Revealed!)
If you choose the prescription option, you are responsible for ensuring the safety of your bedroom setting. Although many latex mattress websites say that latex does not burn quickly, “latex and urethanes both burn hot,” and “latex will self-ignite” under high... | {} |
Surprising behavior of Part[ ]
Look at this list
list={1,2,3,4}
Obiously
list[[1, 2]]
throws the error:
During evaluation of Part::partd: Part specification {1,2,3,4}[[1,2]] is longer than depth of object.
However:
list[[1,All]]
yields (Mathematica 12 on Windows)
Integer[]
which does not make much sense ... | {} |
- Current Issue - Ahead of Print Articles - All Issues - Search - Open Access - Information for Authors - Downloads - Guideline - Regulations ㆍPaper Submission ㆍPaper Reviewing ㆍPublication and Distribution - Code of Ethics - For Authors ㆍOnlilne Submission ㆍMy Manuscript - For Reviewers - For Editors
A note on zeros ... | {} |
# Groups and Rings course suggestion
I am a physics undergrad, looking to explore pure maths.
I apologize if this question is not appropriate for MathSE, but I couldn't resist posting it. Feel free to close it down.
I haven't taken any formal course in maths uptil now, but have done some linear algebra, representati... | {} |
Definition:Isolated Point (Real Analysis)
Definition
Let $S \subseteq \R$ be a subset of the set of real numbers.
Let $\alpha \in S$.
Then $\alpha$ is an isolated point of $S$ if and only if there exists an open interval of $\R$ whose midpoint is $\alpha$ which contains no points of $S$ except $\alpha$:
$\exists \... | {} |
### Top 10 Arxiv Papers Today in Machine Learning
##### #1. Analysis of Irregular Spatial Data with Machine Learning: Classification of Building Patterns with a Graph Convolutional Neural Network
###### Xiongfeng Yan, Tinghua Ai
Machine learning methods such as convolutional neural networks (CNNs) are becoming an inte... | {} |
# Common Questions
Why is potential flow a relevant model of fluid flow?
Potential flow is an accurate model in any flow where the effects of viscosity are negligible. This applies outside of boundary layers in aerodynamic and hydrodynamic flows. In most cases boundary layers are thin and attached to the solid surfac... | {} |
# Computational Biomechanics
Dr. Kewei Li
## Two-dimensional BVP: Heat Conduction
In the lecture, we have mentioned the Fourier’s law of heat conduction which describes the relationship between the rate of heat transfer and the temperature gradient. You can read more about this law here. The Newton’s law of cooling ... | {} |
Found 1,704 Documents (Results 1–100)
100
MathJax
A well-balanced asymptotic preserving scheme for the two-dimensional rotating shallow water equations with nonflat bottom topography. (English)Zbl 07556265
MSC: 76M12 76U05 65M08
Full Text:
Full Text:
Selection of radial basis functions for the accuracy of meshfre... | {} |
# Beta hat marginal distribution in Strong OLS setting
If in OLS setting I assume: Epsilon|X is normally distributed (mean= 0; variance= sigma^2 * Identity matrix)
We have that the estimated coefficients (each "beta hat j") is conditional on X normally distributed.
But if we consider "beta hat j" not conditional on ... | {} |
# Bibliotek
Musik » Fatboy Slim »
## Don't Let the Man Get You Down
41 spelade låtar | Gå till låtsida
Låtar (41)
Låt Album Längd Datum
Don't Let the Man Get You Down 3:17 19 sep 2012, 13:25
Don't Let the Man Get You Down 3:17 5 jun 2012, 21:56
Don't Let the Man Get You Down 3:17 9 jun 2010, 20:43
Don't Let the Man... | {} |
Update of LDM-294
XMLWordPrintable
Details
• Type: RFC
• Status: Implemented
• Resolution: Done
• Component/s:
• Labels:
None
Description
For the JDR/JSR I woudl like to reissue LDM-294.
There are updates to Org charts, glossary, 3rd party software, risk management, milestones.
Document can be found at https://l... | {} |
# How to digitize an AC signal?
Let's say I have a sinusoidal signal of amplitude 5V and frequency 100Hz. I need an accuracy of 0.1% in the digital signal.
How to determine the ADC parameters required?
Do I need to apply an offset first?
How is the process different than that for DC?
• By accuracy of 0.1% you mean... | {} |
# Undo the Linux trash command
Can we undo operations done in a terminal, for example, file deletion through rm?
Solutions obtained:
1. Aliasing
2. Undelete utilities
3. Backup utilities
4. LibTrash
5. Versioning (FUSE)
-
On rm: It unlinks a file from it's inode. The question: "Where do files go when the rmcommand i... | {} |
## Abstract
The dominant business model in the institutional brokerage industry is under attack from discount brokers, crossing networks, and ECNs, which provide trade execution at less than half the cost of full-service commissions. In contrast, full-service brokers produce research; provide capital, time, and expert... | {} |
# A quick summary of the past six months
Posted on August 24th, 2012
Previous Article :: Next Article
Hi there. This post is a quick summary of few things have been working on over the past six months. Things were quite busy over here!
## 1) Starfish Development
Our main project was developing a new 2D rarefied gas... | {} |
# When students work in a chemistry lab, the location of which item would be the most important for each
6 answers
###### Question:
When students work in a chemistry lab, the location of which item would be the most important for each student to know?
a. broom and dust pan, in case the student needs to sweep up broke... | {} |
# precise official definition of a cell complex and CW-complex
I would be very grateful If someone could state a precise definition (direct one and inductive one) of a cell complex and CW-complex, since my intuition is telling that some restriction is missing and also, the definitions from several books seem to be ver... | {} |
# Analytical solution for bound state energies of infinite well
Tags:
1. Oct 20, 2014
### Bob007
Hi there
I am trying to find bound state energies assuming infinite potential. I have been told it can be done by analytically solving Right Hand Side and Left Hand Side of an equation such as:
E^1/2 tan(2ma^2E/4hbar)^1/... | {} |
# Apparent frequency as function of distance
So the Doppler effect says that the frequency of sound changes due to relative motion of source and observer. My question is if there any expression that tells how the apparent frequency changes in terms of the distance between the observer and source.
I know we have $$f'=... | {} |
1. ## Cauchy <=> convergent
So I am trying to prove that a sequence is cauchy if and only if it is convergent using only the Bolzano Weierstrass therom for sequences
[Any bounded sequence must have at least one convergent subsequence]
So far, all I have gotten in the forward direction (cauchy => convergent) is that a... | {} |
# Synopsis: Diffraction of a nonexistent beam of light
Researchers demonstrate a new type of nonlinear diffraction with no linear analog.
When a nearly monochromatic wave passes through a spatially modulated medium, a diffracted beam, whose wave vector satisfies the vector sum of the incident wave vector and an integ... | {} |
### Home > MC2 > Chapter 3 > Lesson 3.2.1 > Problem3-61
3-61.
Find the missing information from the following relationships.
1. Mark has downloaded four times as many songs on his music player as Chloe. If Mark has $440$ songs, how many songs does Chloe have?
Since Mark has $4$ times as many songs as Chloe and he h... | {} |
# Method of Proving Euler's Formula?
1. Dec 21, 2012
### Mandelbroth
The other day, I was thinking about Fourier series. Because eix is periodic, with period of 2 pi, we can use the Fourier series...
$\displaystyle \frac{1}{2\pi} \int_{-\pi}^{\pi} e^{ix} \ dx + \frac{1}{\pi}\sum_{n=1}^{\infty}\left[\left(\int_{-\pi... | {} |
## Discovery Learning – Rational Expressions
This week I tried something a little different in my Elementary Algebra class for simplifying rational expressions. Typically I walk through an example of simplifying a numerical fraction to lowest terms and try to extract the key ideas and apply them to rational expression... | {} |
# Tag Info
10
If you are not worried about the speed or exact contour of hand, below is a simple solution. The method is like this : You take each contour and find distance to other contours. If distance is less than 50, they are nearby and you put them together. If not, they are put as different. So checking distanc... | {} |
# Eigenvalues of $A$ compared to $A^H$
How are the eigenvalues of $A^H$ related to the eigenvalues of $A$?
Here $A^H$ is the conjugate transpose of $A$
-
1. Please edit your question so it is self-contained (and does not rely on reading the title to make sense). 2. 33 percent acceptance rate? You don't like the ans... | {} |
Perl Monk, Perl Meditation PerlMonks
### Re: Perl allows you to change the definition of false to make it true. (And vice versa.)
on Dec 14, 2012 at 14:26 UTC ( #1008843=note: print w/ replies, xml ) Need Help??
This should please the comp.lang.c old timers:
use strict; use warnings; use 5.010; BEGIN { &Internals:... | {} |
# Homework Help: Rearranging the Projectile Motion Base Quadratic Formula for Initial Velocity
1. May 23, 2010
### Pearlhammer
1. The problem statement, all variables and given/known data
What I'm supposed to do is to rearrange the this formula -16t^2+Vt+h and solve it for V.
V= Initial Velocity t= time (throwing th... | {} |
# Planar wave normally incident on dielectric boundary
1. Oct 15, 2012
### cfitzU2
PROBLEM: I am asked to consider a parallel polarized planar wave with frequency ω is normally incident on a dielectric boundary. The incident time average power flux P_i = 100 w/m^2. The first medium is free space and the second has v... | {} |
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# Find the equation of the plane passing through the point ( 1, -1, 2 ) having ( 2, 3, 2 ) as direction ratios of normal to the plane?
Can you answer this question?
0 votes
0 answers
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0 answers
0 votes
0 answers
0 votes
1 answer
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# Which d-block cation has the maximum hydration enthalpy?
Among $$\ce{Mn^2+}$$, $$\ce{V^2+}$$, $$\ce{Ni^2+}$$ and $$\ce{Ti^2+}$$, which cation is having the highest hydration energy to form the aqua complex $$\ce{[M(H2O)6]^2+}$$?
I guess $$\ce{Mn^2+}$$ should be the answer as it has the most stable electronic config... | {} |
Introduction
This paper presents several extensions of the Skip-gram model intriduced by Mikolov et al. [8]. Skip-gram model is an efficient method for learning highquality vector representations of words from large amounts of unstructured text data. The word representations computed using this model are very interest... | {} |
# A quantity measuring the separability of Banach spaces
Let $$X$$ be a Banach space. It is natural for us to introduce a quantity measuring the separability of sets as follows: for a subset $$A$$ of $$X$$, we set
$$\textrm{sep}(A)=\inf\{\epsilon>0: A\subseteq K+\epsilon B_{X}$$ for some countable subset $$K$$ of $$X... | {} |
Questions & Answers
Question
Answers
# If 45mm is expressed in cm then answer is 4.5 cm$(a){\text{ True}} \\ (b){\text{ False}} \\$
Answer Verified
Hint: In this question we have to tell whether conversion of 45mm into cm is 4.4 cm or not. Use the basic unit system conversion rule that 1cm = 10mm. Then use the unitar... | {} |
## Algebra: A Combined Approach (4th Edition)
$6$
Step 1: $(5x)^{0}+5x^{0}$. Step 2: Using the zero exponent rule, $(5x)^{0}=1$ and $x^{0}=1$. Step 3: Therefore the equation becomes $1+5(1)$. Step 4: $1+5(1)=6$. | {} |
## Strangeloop
I will be speaking at StangeLoop this September. Check out the website for up to the minute details. My talk is titled The Eight Fallacies of Distributed Computing based on Peter Deutsch and James Gosling's earlier discussion of these fallacies.
### Abstract
The wild growth of the web and mobile has d... | {} |
# Pure Rotational Motion!
The moment of inertia of a body about a given axis is $$1.2kg~m^{2}$$ . Initially the body is at rest. In order to produce a Rotational Kinetic Energy of $$1500J$$ an angular acceleration of $$25rad~s^{-2}$$ must be applied about the axis of rotation for a duration of how many seconds ?????
... | {} |
Journal topic
Ocean Sci., 15, 1327–1340, 2019
https://doi.org/10.5194/os-15-1327-2019
Ocean Sci., 15, 1327–1340, 2019
https://doi.org/10.5194/os-15-1327-2019
Research article 07 Oct 2019
Research article | 07 Oct 2019
# The Pelagic In situ Observation System (PELAGIOS) to reveal biodiversity, behavior, and ecology o... | {} |
# At a height of 100 km, what speed do you need to be going to escape Earth's gravity?
I understand that the escape velocity of Earth is 11 km/s. However, Earth's gravitational sphere of influence is not infinite, so it is possible to go slower than that and still escape the sphere of influence (Because of the sun.) I... | {} |
1. ## diverging or converging?
determine whether the integral diverges or converges
if it converges then evaluate the integral
integral from 0 to infinity: xe^-(x^2) dx
integral from 0 to 1: xln(x) dx
integral from 1 to infinity: (ln t) / (t^2) dt
integral from 0 to 2: 1 / (t-1) dt
i have solved the first integra... | {} |
## Creating a C++ Hash-Table quickly, that has a QString as its Key-Type.
This posting will assume that the reader has a rough idea, what a hash table is. In case this is not so, this WiKiPedia Article explains that as a generality. Just by reading that article, especially if the reader is of a slightly older generati... | {} |
# Lab 5
Deadline: EOL (End of Lab) Friday, October 18th
## Objectives
• TSWBAT practice debugging RISC-V assembly code.
• TSWBAT write RISC-V functions that use pointers.
## RISC-V Simulator
Like in previous weeks, we will be using the Venus RISC-V simulator (which can be found online here).
## Exercise 1: Debugg... | {} |
Abstract
By introducing a labor market into the neoclassical asset pricing model, limited capital market participation can be an equilibrium outcome. Labor contracts are derived endogenously as part of a dynamic equilibrium in a production economy. Firms write labor contracts that insure workers, allowing agents to ac... | {} |
##### Notes
This printable supports Common Core Mathematics Standard 4.MD.A.2.
##### Print Instructions
NOTE: Only your test content will print.
To preview this test, click on the File menu and select Print Preview.
See our guide on How To Change Browser Print Settings to customize headers and footers before printi... | {} |
# Cubic Function
A cubic function is a polynomial function of degree $3$ . It can be written in the form $f\left(x\right)=a{x}^{3}+b{x}^{2}+cx+d$ , where $a,b,c$ and $d$ are real numbers and $a\ne 0$ .
It can also be written as $f\left(x\right)=a{\left(x+b\right)}^{3}+c$ , where $a,b$ and $c$ are real numbers and $a... | {} |
The goal of motifator is to allow users to generate spatial motifs that replicate the ones seen in real-world data, without including any potentially identifying information.
## Installation
You can install motifator from github with:
# install.packages("devtools")
devtools::install_github("jzelner/motifator")
## E... | {} |
# Question #52ae1
Dec 31, 2014
$k = \pm \frac{5}{2}$
You have $4 {x}^{2} - 8 k x + 9 = 0$
and you know that the two solutions, ${x}_{2} \mathmr{and} {x}_{1}$, are related as:
${x}_{2} - {x}_{1} = 4$
You solve your equation with $k$ in place:
${x}_{1 , 2} = \frac{8 k \pm \sqrt{64 {k}^{2} - 4 \left(4 \cdot 9\right)}}... | {} |
## §1.1: On analysis of boolean functions
This is a book about boolean functions, \begin{equation*} f : \{0,1\}^n \to \{0,1\}. \end{equation*} Here $f$ maps each length-$n$ binary vector, or string, into a single binary value, or bit. Boolean functions arise in many areas of computer science and mathematics. Here are ... | {} |
# Multiply defined labels with \usebox
I want to duplicate some content without re-defining its labels. For example,
\newbox{\foobox}
\sbox{\foobox}{\vbox{\section{Foo}\label{sec:foo}}
\usebox{\foobox}
\usebox{\foobox}
will emit a warning, because sec:foo is defined more than once. Is there any way to prevent the s... | {} |
Quick Forum Questions
Recommended Posts
6 hours ago, michel123456 said:
Yes it used to be somewhere near the smilies button. Now it appears as a <>"code" button. See screenshot below.
Our options are different. I've confirmed now on several browsers. The button is there for me on each of the following: Chrome, M$Ed... | {} |
# Infinite potential barrier Q
1. Nov 28, 2008
### ballzac
Just a quick question. Solving the Schrodinger equation (time-independent) for an infinite potential barrier, I end up with two wavefunctions.
In region I,
$$V(x)=0$$
$$\Rightarrow\psi(x)=Acos(\frac{\sqrt{2mE}}{\hbar}x)+Bsin(\frac{\sqrt{2mE}}{\hbar}x)$$
I... | {} |
# How do you find the domain and range of sine, cosine, and tangent?
Nov 19, 2014
The domain and range of trigonometric functions are determined directly from the definition of these functions.
Let's start from the definition.
Trigonometric functions are defined using a unit circle on a coordinate plane - a circle o... | {} |
# Remainder Theorem With Second Degree Divisor
What is the remainder when x2013 is divided by x2– 1? This problem was taken from 2009 MTAP-Dep-Ed Math Challenge Finals. The problem looks very easy but if you don’t know the basic principle how to deal with this problem you can never answer this in just a minute. This a... | {} |
# NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals
NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals: Many shapes around us are in the form of quadrilaterals. Such as top of a table, paper, wall, roof etc. So studying about properties of different types of quadrilaterals is necessary. The NCERT Solu... | {} |
# American Institute of Mathematical Sciences
May 2009, 3(2): 259-274. doi: 10.3934/ipi.2009.3.259
## A time-domain probe method for three-dimensional rough surface reconstructions
1 Department of Mathematics, University of Reading, Whiteknights, PO Box 220, Berkshire, RG6 6AX, United Kingdom, United Kingdom
Rece... | {} |
Find the derivative of the functions: 5sec x + 4cos x
Asked by Abhisek | 1 year ago | 56
##### Solution :-
$$f'(x)=\lim\limits_{h \to 0}\dfrac{f(x+h)-f(x)}{h}$$
$$f(x)= 5 sec x + 4 cos x$$
$$f(x)= \dfrac{d}{dx}(5secx+4cosx)$$
By further calculation, we get
$$5\dfrac{d}{dx}(secx)+4\dfrac{d}{dx}(cosx)$$
$$5 \;se... | {} |
# Illogical conclusion about a mass on a spring [closed]
If you place a weight on a spring and it is an equilibrium, then you have this equation:
$$mg = kx$$
you would solve for k and get:
$$k = mg/x$$
but, if we used conservation of energy, assuming that when the mass is on the spring it is at x = 0, we would get... | {} |
# std::cyl_bessel_i, std::cyl_bessel_if, std::cyl_bessel_il
double cyl_bessel_i( double ν, double x ); float cyl_bessel_if( float ν, float x ); long double cyl_bessel_il( long double ν, long double x ); (1) (since C++17) Promoted cyl_bessel_i( Arithmetic ν, Arithmetic x ); (2) (since C++17)
1) Computes... | {} |
# 17 The ns-3 Network Simulator
In this chapter we take a somewhat cursory look at the ns-3 simulator, intended as a replacement for ns-2. The project is managed by the NS-3 Consortium, and all materials are available at nsnam.org.
Ns-3 represents a rather sharp break from ns-2. Gone is the Tcl programming interface;... | {} |
# Crazy integral
1. Nov 1, 2007
### Doom of Doom
$$\int_{0}^{2\pi} \frac{dx}{1+e^{sin(x)}}$$
How would you evaluate this integral? Where do you even start?
2. Nov 1, 2007
### hotcommodity
Well, we know that $$\int \frac{dx}{1 + x^{2}} = arctan(x) + C$$.
How can we think of $$e^{sin(x)}$$ as a term that's been s... | {} |
Are there true 360 degree cameras?
I'm looking for a true 360 degree camera, so that's both vertical and horizontal 360 degrees. I've seen some clip-ons for the iPhone, but am really not wanting to by an iPhone 4S for this.
What I would like to see: - decent resolution: at least 1920x1080. - and 30fps
I can't settle... | {} |
Tricki
## Divide and conquer
### Quick description
When an mathematical object that exhibits many distinct features, each of which makes it more difficult to control that object effectively, try decomposing the object into better-behaved (and non-interacting) components, each of which only has one of the features do... | {} |
## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
$\text{slope: } 2 ,\\\\\text{$y$-intercept: } -\dfrac{3}{2}$
Using the properties of equality, the given equation, $12x-6y=9$, is equivalent to \begin{array}{l} -6y=-12x+9 \\\\ y=\dfrac{-12}{-6}x+\dfrac{9}{-6} \\\\ y=2x-\dfrac{3}{2} .\end{ar... | {} |
# How much does performance differ between people?
post by Max_Daniel, Benjamin_Todd · 2021-03-25T22:56:32.660Z · EA · GW · 74 comments
## Contents
Acknowledgments
Endnotes
None
by Max Daniel & Benjamin Todd
[ETA: See also this summary of our findings + potential lessons by Ben for the 80k blog.]
Some people s... | {} |
# TrigonometryTrying to resolve a trig identity
#### dwsmith
##### Well-known member
I am trying to resolve a trig identity for some notes I am typing up. On paper, I wrote recall $e(\sin(E_1) - \sin(E_0)) = 2\cos(\zeta)\sin(E_m)$. I have no idea what I am recalling this from now at least.
Identities I have set up a... | {} |
# Dealing with more complex entities in an ECS architecture
Preamble: I'm working on a level editor for my engine, which uses an ECS architecture. I have around a dozen component types so far, mostly dealing with graphics, like lighting components, model, and other mesh related things like skeleton and collider compon... | {} |
# Francesco Maurolico
### Quick Info
Born
16 September 1494
Messina, Kingdom of Sicily (now Italy)
Died
22 July 1575
Messina, Kingdom of Sicily (now Italy)
Summary
Francisco Maurolico was an Italian Benedictine who wrote important books on Greek mathematics. He also worked on geometry, the theory of numbers, optics,... | {} |
# Oscillations about equilibrium for coupled differentail equations
I have the following system of equations:
\begin{align} \frac{dX}{dt} &= 2Y-2\\ \frac{dY}{dt} &= 9X-X^3 \end{align}
I would like to study the property of solutions to this function about the point $(3,1)$. Namely, I'd like to find a linear approxima... | {} |
main-content
## Weitere Artikel dieser Ausgabe durch Wischen aufrufen
14.11.2017 | Original Paper | Ausgabe 3/2018 Open Access
# Improved nine-node shell element MITC9i with reduced distortion sensitivity
Zeitschrift:
Computational Mechanics > Ausgabe 3/2018
Autoren:
K. Wisniewski, E. Turska
## 1 Introduction
It ... | {} |
1. ## Factoring Question
I am asked to factor the equation
$4x^2 - 4x - 15 = 0$
To my knowledge, your supposed to find pairs of factors that multiply to give -15 and add to give -4, correct?
I can't find a pair that gives both those answers.
I'm stuck.
2. Originally Posted by cantstop01
I am asked to factor the e... | {} |
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