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

Feb2313 09:24 AM
micromass

1 
46,239 
By definition, the sum of any two vectors of a vector space will be a vector in the same vector space. But does this...

Feb1710 05:55 AM
bpet

3 
1,206 
Hello,
This is my first post and I must emphasise that I do not have a science/maths training background and this...

Aug813 10:44 AM
anja.ende

2 
583 
Does anyone have an idea to solve this seri ,containing the bessel function of first kind?

Aug510 11:27 AM
mrtnoshad

0 
598 
I don't understand this point:
Given the open set E = U_(a in L) I_a. Union of open intervals
We're showing this...

Mar911 10:57 PM
chiro

4 
1,206 
"Define a * b, for a,b \in R by a * b = ab+a+b. What we just have done is defined a new operation *, in terms of the...

Aug1208 06:33 PM
Mute

11 
1,601 
Could someone please give me a basic idea on the following :
a) Use of linear interpolation . the Newton Raphson...

Apr2006 10:57 PM
sparsh

6 
1,228 
Hello everyone. Actually my father is willing to learn calculus. He is good in number system and trigonometry and...

Feb712 08:42 AM
lugita15

8 
1,451 
Hey guys, i need some help... im trying to compute the triple integral z dx dy dz, where R is the region bounded by...

Dec406 02:08 PM
marc.morcos

4 
1,398 
Hello,
Can anybody help me by recommending a rigorous calculus textbook.
I have done some parts of Thomas's Calculus...

Mar1811 09:45 PM
Raywashere

4 
2,692 
I recently had a calculus midterm, but was baffled at how to even start this question. Can anyone point me in the...

Oct1204 10:54 PM
galois427

3 
2,043 
I am trying to learn the calculus of variations, and I understand the mathematical derivation of the EulerLagrange...

Dec1606 09:32 PM
Saketh

2 
1,674 
hello all,
i think my question has closer ties to mathematics that's why im posting here.
how do i interpret...

Apr211 01:00 PM
ptown

3 
590 
A canister is dropped from a helicopter 500m above the ground. Its parachute does not open, but the canister has been...

Feb610 01:53 PM
gsphysics

0 
4,463 
hi,
I have this question which is a challenging problem:
in this link you will veiw the graph of the question ...

Nov2407 03:19 AM
inferi

2 
4,312 
This isn't a homework question or anything, but I came across this challenge problem posted on a Harvard Math 25a...

Dec309 04:02 PM
altcmdesc

5 
1,038 
Could someone confirm or refute the following statement?
f \in L^p\left(X, \mu\right) \: \Leftrightarrow \:...

Oct510 05:17 PM
JSuarez

2 
991 
i'm looking for help finding a closed form expression for the following derivative :...

Feb713 08:15 PM
mmzaj

0 
506 
Who has a pdf copy of the book A Companion to Analysis...by Thomas Korner?

Jun510 05:10 PM
Landau

2 
1,432 
"Companion" used to be a great online tome (600+pp) on real analysis, that was available for free. I had printed out...

Mar1104 02:32 PM
110

8 
4,250 
Could anyone help me on this question? Is it true that
\sum_{k=n+1}^{2n}\left(\begin{array}{c}...

Dec709 03:36 AM
forumfann

5 
1,020 
I'm studying the nonlinearity effect of power amplifier on multicarrier signal. While modeling the behavior of power...

Jun610 11:26 PM
singhofmpl

2 
783 
Hi all.
The problem is "Prove that a function which is analytic in the whole plane and satisfies an inequality...

Dec3010 10:57 AM
ampat

3 
2,158 
Is there any nice trick for finding the Taylor polynomial of a composition of 2 functions, both of which can be...

Oct1307 01:18 AM
Gib Z

2 
1,590 
When one writes \int p(t) \, dt is the constant of integration implied? I have always thought that it wasn't necessary...

Jan2810 05:02 AM
HallsofIvy

6 
1,303 
It can be shown from Euler's formula that
\left(1\right)^x = \cos(\pi x) + i\sin(\pi x)
However, consider x...

Jul2012 10:15 AM
Techian

5 
913 
I have u(x,t)=2xtx^2 find maximum in region {2 ≤ x ≤ 2 , 0 ≤ t ≤ 1}
I believe to find the critical point first I...

Nov1104 10:26 AM
sal

1 
738 
i have the following conjecture about infinite power series
let be a function f(x) analytic so it can be expanded...

Aug1610 11:25 PM
Eynstone

1 
914 
Is it true that
\int_0^1 f(x) dx \in \mathbb{Q} \Rightarrow \int_0^1 x f(x) dx \in \mathbb{Q}
?
(Suppose ...

Sep111 01:04 PM
Damidami

4 
1,066 
i've got the following conjecture about XI function, the following determinant
p_n(x) = \det\left
with \mu...

Dec1109 03:03 AM
zetafunction

0 
594 
let be the multiple integral
\int _{V}dV e^{A_{i,j,k,l}x^{i}x^{j}x^{k}x^{l}} \approx C...

Sep1908 04:23 AM
mhill

0 
814 
We know that a constant can be moved through limit sign. However, according to my understanding, this result follows...

Jan2210 08:30 AM
HallsofIvy

2 
1,024 
After reading http://en.wikipedia.org/wiki/Weierstrass_function it occurred to me that I could do the same thing to an...

Dec2706 05:52 PM
matt grime

15 
5,473 
Dear friends,
I am interesting to find some functions g satisfying the following convolution inequality
...

Jun412 11:42 AM
Undecided Guy

1 
1,004 
Hi,
can someone please give me an example of what a convolution of a convolution would look like ?
Thanks

Jun910 07:36 AM
thrillhouse86

4 
1,067 
Hello. I have a couple limit problems for my homework and I'm not sure what to do with them.
1. lim x>0 of (a^x ...

Feb2409 01:05 AM
gsxrK3

1 
599 
1.If you have a vector field F = <y,x>/(x^2 + y^2)
is that the same thing as saying: F = < y/(x^2+y^2), x/(x^2 +...

Dec211 06:04 AM
HallsofIvy

2 
918 
integral of 10/((x1)(x^2+9)) dx
integral of x^3/((x+1)^3) dx
both these are under the partial fraction section,...

Apr2104 09:33 PM
Ebolamonk3y

3 
2,290 
given a set of orthogonal polynomials p_{n} (x) with respect to a certain positive measure \mu (x) > 0 on a...

Dec409 09:34 AM
zetafunction

0 
693 
I have a question about university course offerings.
This semester I'm taking a course called "Introduction to...

Mar710 10:32 AM
fourier jr

3 
3,394 
Because the administrators recomend to post the topics from classical geometry here, there's one covering problem,...

May304 03:21 PM
dapet

0 
1,660 