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

Feb2313 09:24 AM
micromass

1 
45,055 
How do we get the power series of arctan using integration. Could someone explain this step by step as I'm quite...

Apr112 03:30 AM
hivesaeed4

3 
1,262 
Hi,
So in my book they separate out a solution the heat equation into a function of x and a function of t and then...

Mar3112 04:53 PM
volog

0 
789 
Hi all ! I am terribly sorry if this was answered before but i couldn't find the post. So that's the deal. We all know...

Mar3112 09:29 AM
HallsofIvy

1 
1,354 
Difficult with this problem.
Find all entire functions f such that f(z) = 1 for all z with z = 1.
Are there...

Mar3012 10:51 PM
DonAntonio

3 
1,175 
greetings . we have the integral :
\lim_{T\to \infty }\int_{2iT}^{2+iT}\frac{(s1)^{n}}{s}ds
which diverges for...

Mar3012 03:11 PM
mathman

2 
861 
I am not sure what the derivative with respect to a complex conjugate is and I have not been able to find it in any...

Mar3012 02:05 PM
DonAntonio

1 
1,647 
Hi there. Evaluating the expression \int\frac{dx}{\sqrt{x^{2}+y^{2}}} I can get to the result...

Mar3012 12:54 PM
carlosbgois

2 
869 
Does anyone know how to prove the following statement? I haven't messed with integrals for awhile and I have to say...

Mar3012 12:28 PM
Whovian

3 
747 
I would like to find derivations of exp(ik0r) respect to k in order to calculate exp(ik1r) by using Taylor...

Mar3012 10:02 AM
Whovian

1 
1,011 
I was reading a paper where the following integral appears:
I = \int_0 ^{\pi}dt\sqrt{k^2 + \sin^2t}
In the...

Mar3012 09:49 AM
phsopher

6 
872 
Any books discussing the formula of d^2Z and d^3Z?
Are they liked that? Anyone saw them before?
Z(x,...

Mar3012 07:20 AM
HallsofIvy

1 
749 
We have a function f:R^2>R and it has partial derivative of 2nd order.
Show that f_{xy}=0 \forall (x,y)\in...

Mar3012 05:32 AM
hunt_mat

3 
719 
If I have \int e^{2x}sin(x)sin(2x)
And then I use Eulers formula to substitute in for the sine terms.
So I...

Mar3012 05:25 AM
cragar

10 
2,300 
i see people discussing the convergence radius of a perturbation series in the literature
i am really baffled
...

Mar3012 03:55 AM
hunt_mat

1 
876 
Suppose f is a biholomorphic mapping from Ω to Ω, if f(a) = a and f'(a) = 1 for some a in Ω, can we prove that f(z) =...

Mar2912 09:05 PM
micromass

2 
810 
When do derivatives in the sense of distributions and classical derivative coincide?
Of course f needs to be...

Mar2912 01:51 PM
Stevan White

3 
2,557 
How would one show that if there is a number c for which g'(c)=0, then every point on the level set {(x,y)H(x,y)=c}...

Mar2912 12:41 PM
autarch

2 
1,032 
Can we prove that the Laplace transform represents a holomorphic function in the right half plane Re(z)>0?

Mar2912 11:48 AM
iamqsqsqs

0 
821 
I THINK this theorem in short words states that if a function is continuous in an interval then it has a maximum. But...

Mar2912 08:54 AM
Hernaner28

2 
683 
I wonder how would I get out the integral when the denominator is squarerooted.
∫\frac{1}{\sqrt{3xx^2}} dx

Mar2912 07:24 AM
JJacquelin

2 
1,427 
If the derivative of x^n equals nx^(n1), then the derivative of x or x^1 equals x^0, but 0^0 is undefined. Does that...

Mar2912 05:45 AM
LikeMath

26 
2,372 
This app has helped me so much with calculus.
Calculus Genie:
http://tinyurl.com/89shv5w

Mar2812 05:38 PM
Fluxon

1 
1,016 
If the function f:D→ℝ is uniformly continuous and a is any number, show that the function a*f:D→ℝ also is uniformly...

Mar2812 10:05 AM
HallsofIvy

2 
1,385 
I need to get a general function in 2 variables f(m,n).
The task is to find a general function f(m,n) with these...

Mar2812 09:09 AM
Emilijo

0 
561 
Dear Users,
For normally distributed random variables x and y's p.d.f.:
\frac{1} {\sqrt{2\pi...

Mar2812 12:30 AM
mahtabhossain

0 
1,137 
The original problem is as follows:
IF E,F are measurable subset of R
and m(E),m(F)>0
then the set E+F contains...

Mar2712 10:20 PM
Bacle2

6 
2,282 
To be specific, with total derivative I mean the linear map that best approximates a given function f at a given...

Mar2712 11:42 AM
birulami

0 
1,146 
The cone centre is the zaxis and has base ρ=1 and height z=1,
I'm looking at the lecture notes and it says the limit...

Mar2712 05:41 AM
sarubobo28

2 
1,934 
I have a function namely cos(x)/x^2 which I need to integrate in the
limits of x = 1 to x = +1.
If we plot the...

Mar2712 03:25 AM
micromass

16 
1,862 
let f(X) : R^n > R be a function defined on convex set S s.t S is a subset of
Rn (real space ndim). Let f is...

Mar2612 10:13 PM
russel.arnold

0 
810 
I wasn't really sure where to post this because I am covering this in 2 classes (Math and Physics). Figured this...

Mar2512 10:59 PM
paul2211

6 
1,522 
Hi, I know this one is not too hard, but I've been stuck for a while:
Say f is holomorphic and nonconstant on...

Mar2512 10:28 PM
Bacle2

15 
1,866 
other than the physics (work) what are the applications of line integral? particularly does it have any use in finance...

Mar2512 09:00 PM
woundedtiger4

3 
1,207 
I tried very long time to show that
For closed subset A,B of R^d, A+B is measurable.
A little bit of hint says...

Mar2512 11:19 AM
hhj5575

8 
1,565 
I was experimenting with some physics and the mathematics started to get a bit tougher than what I'm used to. I had a...

Mar2412 11:24 PM
NanoPassion

3 
992 
Hey guys girls and thanks in advance
(Sorry if this post is in the wrong area)
Ive been working with splines in 2D...

Mar2412 05:49 PM
Trenthan

0 
753 
I just sent some time dicking around with the MacLaurin expansion of exp(z2) to derive a series expression for √π, by...

Mar2412 04:17 PM
alexfloo

3 
1,028 
I've started selfteaching asymptotic methods, and I have some theoretic questions (and lots of doubts!).
1. Say I...

Mar2412 03:47 PM
Redbelly98

1 
1,067 
This is not homework.
Earlier today I was trying to prove that if a limit of a certain function exists, then it's...

Mar2412 08:31 AM
arildno

5 
1,072 
i have found the area of sphere in two ways using the same approximation.but i get two different answers ;one the...

Mar2412 05:42 AM
slider142

3 
1,255 