
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

1 
38,224 
Hello,
I have two datasets containing power spectral density data to be compared. One of these datasets is...

Aug1612 03:38 AM
Simon Bridge

3 
1,281 
Hi all,
I have a summation series which goes like this,
S = ^2 + ^2 + ^2 + ....... + ^2
Since each term is...

Aug1612 02:54 PM
yogo

8 
2,202 
Can anybody provide some resources (books, websites etc.  preferably websites or course notes) for a (somewhat...

Aug1612 06:57 PM
LolWolf

3 
916 
People who are actually supposed to answer this question are those who know about the Descartes' Rule of Signs, so I...

Aug1712 03:44 AM
Millennial

2 
832 
Warning: Semantics battle may ensue, tread lightly
So I was wondering the other day, the repeatedaddition definition...

Aug1712 04:48 AM
Studiot

26 
2,416 
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...

Aug1712 05:31 AM
Mentallic

2 
895 
hello!
is there a complete list of mathematical notations?
thanks!

Aug1712 01:35 PM
Diffy

3 
1,913 
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...

Aug1712 06:38 PM
Bacle2

13 
1,202 
I've been playing around with a computer modelling software(maya) and I come across a definition 'isoparametric...

Aug1812 12:15 AM
Sourabh N

1 
981 
Pretend that some god has every real number in its head, and it is thinking of only one of them randomly. There seems...

Aug1812 03:14 AM
Dickfore

6 
877 
Hi guys I have a problem to solve, I'd like to find the minimum distance between a point and a geometric locus...

Aug1812 12:57 PM
HallsofIvy

9 
983 
I've heard before that the process involves determining the eigenvalues of a system of a equation in the form of a...

Aug1812 06:09 PM
DavidSnider

1 
634 
I can't imagine that every possible equation is preprogrammed. If that is not the case, then how do the calulators...

Aug1912 01:18 AM
Charmar

1 
689 
I'm a little confused by what appears to me to be a paradox. I understand that the equation for an oblate spheroid is...

Aug1912 04:38 AM
ianyappy

2 
923 
I am still learning basic math, and in one form or another it all seems basically: "Find x, or in some case some other...

Aug1912 10:52 AM
micromass

38 
3,625 
Does anyone have an easy formula for finding the centroid coordinates under a degree 3 bezier curve?
The whole...

Aug2012 06:33 AM
jjj888

22 
2,602 
For function optimization (error minimalization) there are relative easy methods like neldermead and simutaled...

Aug2012 03:20 PM
tjerk

0 
730 
Hey guys, how come when you have a parametric equation with two free variables it creates a surface, but when you have...

Aug2112 01:11 AM
Bacle2

2 
732 
Let me preface this by saying Math is not my strongest subject.
I am curious if there is any relationship between...

Aug2112 01:19 AM
Bacle2

12 
1,708 
what is mathematical induction? explain with an example.

Aug2112 09:04 AM
PhysicoRaj

4 
1,091 
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!)...

Aug2112 05:03 PM
Bacle2

30 
6,182 
Hello
I have a mathematical dilemma. How can the following transfer function be simplified:
\frac{s^{2}+1}{s+1}...

Aug2212 09:53 AM
DonAntonio

3 
543 
According to Nash's Theorem, every game has at least one Nash Equilibrium, whether that be a pure strategy or a mixed...

Aug2312 07:36 AM
Bacle2

3 
794 
Suppose you have written down a seven digit phone number, but you realize you made a mistake and two of the digits are...

Aug2312 04:41 PM
haruspex

5 
1,008 
In most cases division be zero ends up with not defined , but why do people sometimes call it infinity ?

Aug2312 09:52 PM
Hurkyl

15 
1,662 
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

Aug2412 06:37 AM
uart

4 
693 
I read here in Physics Forums that a number can have more than one decimal expansion.
Really? Can someone explain...

Aug2412 11:01 AM
uart

2 
529 
I don't understand the intuition/proof of why arc length = arc angle * radius. This may be partially because I don't...

Aug2412 06:08 PM
Mark44

3 
1,380 
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...

Aug2412 11:50 PM
uart

11 
2,195 
The question I have is a bit strange.
I do not have ANY formulas or equations given.
I was only given bunch of...

Aug2512 12:11 AM
LCKurtz

5 
795 
So I understand the math, that is, how to solve these problems. But how does inverting the base cancel out the...

Aug2512 01:39 AM
bcheck

4 
1,196 
Are there an \aleph_0 # of natural numbers with an
\aleph_0 # of digits?

Aug2512 03:27 PM
cragar

11 
1,213 
f(n)=(1/2)f(n+1)+(1/2)f(n1)1
I got f(n)=n^2.
I can not find anymore solution except this.
I just wonder...

Aug2612 12:32 PM
Bacle2

6 
902 
Hello people,
I have a question about the logscale. What happens when we switch a plot from linear scale to the...

Aug2612 03:59 PM
haruspex

4 
1,307 
for a square wave function,
f(x)= { 1, ∞ ≤ x ≤ 0; +1, 0 ≤ x ≤ ∞
Expanding it in fourier series gives a...

Aug2612 04:00 PM
Bacle2

3 
3,079 
I keep getting slightly confused with the algebraic method of finding a fraction between, two other fraction. Here is...

Aug2712 01:07 AM
pwsnafu

3 
1,022 
Would someone check the attached file? It's simple high school algebra.

Aug2712 06:03 AM
micromass

7 
992 
I would like to know what this symbol means:\nVdashSpecifically, in the main result of link] (Theorem 1, at the top of...

Aug2712 11:22 AM
weetabixharry

8 
1,626 
Ciao to everybody,
I've encountered frequently, in forums and news groups, questions about a rectangle inscribed...

Aug2712 11:44 PM
haruspex

14 
4,030 
I have a doubt regarding its proof. First we assume that solution is of the form x^nthen we solve the quadratic...

Aug2812 03:13 AM
Avichal

9 
1,360 