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

Feb2313 09:24 AM
micromass

1 
46,282 
For 1 < p < oo it is true that:
If we have a sequence ( x_n )_(n >= 1) in l^p that converges weakly to zero then that...

Oct2508 09:35 PM
morphism

1 
1,070 
The JGM3 model of earth's gravity is expressed in the form of coefficients C and S to Legendre polynomials in r, theta...

Oct2808 12:16 PM
ronslow

1 
1,241 
Show that lim sup (an+bn)<=limsupan +limsupbn
where (bn) and (an) are bounded...
How would you go from for n < N...

Oct2808 11:07 PM
PhysicsHelp12

1 
1,658 
to be integratable but still give a wrong answer even if all the steps are performed correctly? Assume that an...

Oct2808 12:07 PM
HallsofIvy

1 
974 
In vector calculus, with a space curve C, there are the 3 vectors, tangent, normal, and binormal.
Are they always...

Nov308 03:27 PM
mathman

1 
3,102 
I'm looking over a proof and I'm wondering from which principles does it follow that
\mid a  b \mid < 1 \to \mid a...

Nov508 01:56 PM
duke_nemmerle

1 
1,532 
I am stuck on both these questions, I have no idea where to begin I was given a worksheet which our instructor will...

Nov608 12:54 PM
TacTics

1 
1,716 
I converted the function, {t^n}{e^{t}} where t is the variable (time domain) and n is any real whole integer greater...

Nov908 09:00 PM
flouran

1 
3,021 
find the points of discontinuouty
limit as x,y > (0,0) of function f(x,y) = 1((cos(x^2+y^2)/(x^2+y^2))

Nov1208 03:42 AM
Pere Callahan

1 
2,402 
I was just curious as to why out of all properties of metric spaces (ie compactness, closure, etc), i dont know how...

Nov1508 01:57 PM
morphism

1 
995 
thanks I think I got it :)

Nov1608 05:01 AM
HallsofIvy

1 
1,250 
Hi
Could you please tell me how to integrate it? Thanks ~~
\int_{\infty}^{\infty} \frac {e^{i\omega t}}...

Nov1808 01:46 PM
maze

1 
2,181 
I am having trouble remembering the correct approach here. This is in regards to deriving a governing equation for...

Nov1908 06:08 AM
tinytim

1 
1,548 
I know its a really dumb question and if i reached this far in math i should know but..how do you draw the diagrams...

Nov2008 05:51 AM
HallsofIvy

1 
1,343 
Show that if E is a Borel measurable subset of R, then {(x,y) xy is in E} is also measurable in the product space of...

Nov2108 09:24 AM
Pere Callahan

1 
1,480 
this is the question,
Prove that if f is continuous on (a,b] and if f is bounded on then f is integrable on . ...

Nov2308 05:23 PM
lurflurf

1 
3,077 
Howdy Ho, partner.
I have a series of functions {f_{n}} with f_{n}(x) := x^{n} / (1 + x^{n}) and I am investigating...

Nov2308 08:46 PM
morphism

1 
1,556 
Does anybody know substitutions that can be used for the following integrals:
\int (a^2  b^2 \cos\theta)^{3/2}...

Nov2408 06:21 PM
Peeter

1 
1,092 
I've been reading Gunning and Rossi's book on complex analysis in several variables (good book!).
They define...

Nov2708 06:12 AM
lark

1 
1,009 
Hi. I am having trouble getting started on this problem.
I need to find the Laurent series for: f(z) = exp in...

Dec208 08:32 PM
mutton

1 
1,437 
hi there!
I´m doing vector analysis the last two weeks and I feel unsure about this identity. Can anyone of you say...

Dec108 01:28 PM
Marin

1 
972 
Is it always true that if; f(x) = f '(x), then; f (x) =  \int f '(x) ?
That is, the negative of a derivative...

Dec108 08:35 PM
adriank

1 
1,052 
I got a relation as follow
\lambda_k = \frac{2 n(\lambda_k) L}{k}
where \lambda_k is a wavelength at mode k, k...

Dec208 01:16 PM
CompuChip

1 
1,035 
Sorry me again
THE CRC tables define the above integral as
using sqrt(x^2a^2)
let t(x) = sqrt(x^2  a^2)
...

Dec508 10:45 AM
morphism

1 
2,107 
kindly make h or d the subject of the formula
y={1/2pi(dh)}ln(d/h)
thank u
Moderation Note: email address...

Dec508 10:08 AM
Defennder

1 
1,021 
Ok, so a teacher showed an example in class awhile back. So im going over my notes right now, and I don't understand a...

Dec708 05:07 AM
tinytim

1 
1,368 
I'm looking at Gullstrandplainleve coordinates in Kerr metric. While on the whole, it seems pretty straight forward,...

Dec1008 03:56 AM
stevebd1

1 
1,581 
P=P0ekt
I'm given that a population doubles in number in 4 hours. Does that mean the k in the function equals 0.5...

Dec908 07:43 AM
Defennder

1 
1,210 
I am having trouble understanding how to find the limit of a summation. I know the formulas and properties but cannot...

Dec1008 12:23 AM
Lyuokdea

1 
5,918 
Hi,
I have an integral that I find quite difficult, I can't obtain anything from mathematica (but I'm far from...

Dec1008 02:28 PM
CompuChip

1 
553 
Hi all, i found this problem in a topology book, but it seems to be of an analysis flavour. I'm stumped.
Show that...

Dec1508 01:56 PM
Citan Uzuki

1 
783 
If I were given a problem to find this limit:
...

Dec1508 12:01 PM
Citan Uzuki

1 
1,495 
Hey everyone,
I have a system that I know the x,y,z position and the alpha,beta,gamma euler rotation of an object...

Dec1508 05:37 PM
D H

1 
2,683 
I've looked everywhere for a method or approach to break down this integral, but so far, nothing. If anyone has any...

Dec2008 02:01 AM
adriank

1 
1,306 
\Gamma(z) = \int\limits_0^{\infty} t^{z1} e^{t} dt
I can see that if \textrm{Re}(z)>0, then the integral...

Dec2208 07:35 AM
Santa1

1 
1,531 
Hello! Let's see if you can give me some advice on this:
I want to describe a function with a sum of real...

Dec2208 04:04 PM
Dr. Lady

1 
7,890 
Hi,
I am working on the derivation of an equation on electrokinetic flow in microfluidic.
I am stuck at a point...

Dec2308 12:51 AM
lurflurf

1 
3,053 
Assuming that I understood correctly one claim from the Riemann's On the Number of Prime Numbers less than a Given...

Dec2908 01:25 PM
mathwonk

1 
1,468 
I'm facing the following problem which sounded simple but apparently it is not (at least for me):
I have two...

Dec2708 11:14 PM
jostpuur

1 
1,644 
Hello!
Is there any way of calculating the integral of H_n(x) * H_m(x) * exp(c^2 x^2) with x going from infinity...

Jan509 06:51 PM
jostpuur

1 
3,080 