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General Math

- Math topics not applicable to the categories below. High-school Math
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
micromass
1 33,200
1- is there any complex number, x ,such that x^x=i? 2- (-1)^(\sqrt{2})=?
Aug15-12 05:07 PM
haruspex
3 729
This is a fairly standard maximization problem in calculus, but I was wondering if anybody could help me come up with...
Aug15-12 06:35 PM
xaenn
5 1,105
I was reading feynman's lectures on physics and i came across the 23-2 in volume two where he is talking about a...
Aug15-12 09:43 PM
Storm Butler
4 580
Hi, I am trying to understand a theoretical problem involving the contact between two surfaces. I have uploaded a...
Aug16-12 03:18 AM
haruspex
4 858
Hello, I have two datasets containing power spectral density data to be compared. One of these datasets is...
Aug16-12 03:38 AM
Simon Bridge
3 1,148
Hi all, I have a summation series which goes like this, S = ^2 + ^2 + ^2 + ....... + ^2 Since each term is...
Aug16-12 02:54 PM
yogo
8 2,016
Can anybody provide some resources (books, websites etc. - preferably websites or course notes) for a (somewhat...
Aug16-12 06:57 PM
LolWolf
3 852
People who are actually supposed to answer this question are those who know about the Descartes' Rule of Signs, so I...
Aug17-12 03:44 AM
Millennial
2 776
Warning: Semantics battle may ensue, tread lightly So I was wondering the other day, the repeated-addition definition...
Aug17-12 04:48 AM
Studiot
26 2,240
The amount of water in a tank doubles every minute. If the tank was full at the 1 hour mark, when was the tank half...
Aug17-12 05:31 AM
Mentallic
2 815
hello! is there a complete list of mathematical notations? thanks!
Aug17-12 01:35 PM
Diffy
3 1,718
if i have this set x/y where x and y can be any prime. is this dense on the real line. and we will allow x to be...
Aug17-12 06:38 PM
Bacle2
13 1,120
I've been playing around with a computer modelling software(maya) and I come across a definition 'isoparametric...
Aug18-12 12:15 AM
Sourabh N
1 910
Pretend that some god has every real number in its head, and it is thinking of only one of them randomly. There seems...
Aug18-12 03:14 AM
Dickfore
6 825
Hi guys I have a problem to solve, I'd like to find the minimum distance between a point and a geometric locus...
Aug18-12 12:57 PM
HallsofIvy
9 901
I've heard before that the process involves determining the eigenvalues of a system of a equation in the form of a...
Aug18-12 06:09 PM
DavidSnider
1 606
I can't imagine that every possible equation is preprogrammed. If that is not the case, then how do the calulators...
Aug19-12 01:18 AM
Charmar
1 652
I'm a little confused by what appears to me to be a paradox. I understand that the equation for an oblate spheroid is...
Aug19-12 04:38 AM
ianyappy
2 851
I am still learning basic math, and in one form or another it all seems basically: "Find x, or in some case some other...
Aug19-12 10:52 AM
micromass
38 3,315
Does anyone have an easy formula for finding the centroid coordinates under a degree 3 bezier curve? The whole...
Aug20-12 06:33 AM
jjj888
22 2,409
For function optimization (error minimalization) there are relative easy methods like nelder-mead and simutaled...
Aug20-12 03:20 PM
tjerk
0 687
Hey guys, how come when you have a parametric equation with two free variables it creates a surface, but when you have...
Aug21-12 01:11 AM
Bacle2
2 677
Let me preface this by saying Math is not my strongest subject. I am curious if there is any relationship between...
Aug21-12 01:19 AM
Bacle2
12 1,596
what is mathematical induction? explain with an example.
Aug21-12 09:04 AM
PhysicoRaj
4 1,015
Let there be function f(x): f(x)=(b+1)^(b+1)/(b+1!)/ --an example of f(99): 100^100/100!/(99^99/99!)...
Aug21-12 05:03 PM
Bacle2
30 5,697
Hello I have a mathematical dilemma. How can the following transfer function be simplified: \frac{s^{2}+1}{s+1}...
Aug22-12 09:53 AM
DonAntonio
3 503
According to Nash's Theorem, every game has at least one Nash Equilibrium, whether that be a pure strategy or a mixed...
Aug23-12 07:36 AM
Bacle2
3 725
Suppose you have written down a seven digit phone number, but you realize you made a mistake and two of the digits are...
Aug23-12 04:41 PM
haruspex
5 863
In most cases division be zero ends up with not defined , but why do people sometimes call it infinity ?
Aug23-12 09:52 PM
Hurkyl
15 1,495
How to derive formula for the series of numbers as below: (a) 4,8,15,16,23,42 (b) 4,17, 23,38,41,46
Aug24-12 06:37 AM
uart
4 639
I read here in Physics Forums that a number can have more than one decimal expansion. Really? Can someone explain...
Aug24-12 11:01 AM
uart
2 487
I don't understand the intuition/proof of why arc length = arc angle * radius. This may be partially because I don't...
Aug24-12 06:08 PM
Mark44
3 1,254
I have been thinking on this topic for a while. As I have seen on various sites: 1) a^(b/c) means "c"th root of...
Aug24-12 11:50 PM
uart
11 1,924
The question I have is a bit strange. I do not have ANY formulas or equations given. I was only given bunch of...
Aug25-12 12:11 AM
LCKurtz
5 750
So I understand the math, that is, how to solve these problems. But how does inverting the base cancel out the...
Aug25-12 01:39 AM
bcheck
4 1,086
Are there an \aleph_0 # of natural numbers with an \aleph_0 # of digits?
Aug25-12 03:27 PM
cragar
11 1,142
f(n)=(1/2)f(n+1)+(1/2)f(n-1)-1 I got f(n)=n^2. I can not find anymore solution except this. I just wonder...
Aug26-12 12:32 PM
Bacle2
6 837
Hello people, I have a question about the log-scale. What happens when we switch a plot from linear scale to the...
Aug26-12 03:59 PM
haruspex
4 1,192
for a square wave function, f(x)= { -1, -∞ ≤ x ≤ 0; +1, 0 ≤ x ≤ ∞ Expanding it in fourier series gives a...
Aug26-12 04:00 PM
Bacle2
3 2,829
I keep getting slightly confused with the algebraic method of finding a fraction between, two other fraction. Here is...
Aug27-12 01:07 AM
pwsnafu
3 924

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