Recent content by gomes.

[PLAIN]http://img440.imageshack.us/img440/7352/11unled.jpg Having some trouble. I am not sure what d_t(u) and :u(with the . above it) means. Would appreciate some help. Thanks

If f(t) has the Fourier transform F(ω), what is the Fourier transform of the function g(t) = f(3t) − f(4t + 7)? Use the shift property and time scaling property of the Fourier transform to obtain your answer. I have no idea how to start, please help, thanks..

ImageShack® - Online Photo and Video Hosting Im a bit stuck at part (e) and (f) The 4 basic solutions are: sinkx*coskct sinkx*sinkct coskx*coskct coskx*sinkct I got the 4 boundary conditions as: y(0,t)=0 y(L,t)=0 y(x,0)=sin (2pi/l)x dy/dt at t=0, =0 For part (e), I could...

http://imageshack.us/photo/my-images/546/unledho.jpg/ I got the Fourier transform as 2sinc(w) for the first part. How do i do the 2nd part? Thanks.

http://imageshack.us/photo/my-images/710/unled1vr.jpg/ I don't know how to get the 3 limits, could someone teach me how to do it? Thanks :)

http://img34.imageshack.us/img34/1989/analysis123523456.jpg I'm trying to work through some examples, but I am not sure where the following comes from: 1. circled in black -- how do i get the δ<1? 2. circled in red -- how do I get 0<x<2, i.e. x∈(0,2)? 3. cirlced in...

Thanks :)

thanks for your help :)

Studying a maths degree, going onto final year next year, am planning to do a 3rd year course in quantum mechanics. I just want to ask, how much probability theory and differential equations are there in quantum mechanics? Someone said that ultimately quantum mechanics is about probability...

Advise --choosing final year undergrad courses I need to pick my module choices for my 3rd and final year, and I am stuck on the final few modules I should choose. For my final year, I already plan to do courses in complex analysis, functional analysis, stochastic processes, and advanced...

Thanks, i got (lamba, mu, 12lamba-6mu-7) So can i say the student forgot to put/calculate in the -7 in the parametric form? At a glance, how would i know the student got it wrong? Because he didnt put in the -7?

[PLAIN]http://img35.imageshack.us/img35/2033/tangent.jpg I managed to do the first part okay ---- said some stuff about 3x^2 and y^2 term, its not linear etc.. but I am stuck in the part in red. Is it supposed to be something about a normal vector? How do i know what is wrong? and what...

Im not sure how to do the part in red, do i use the comparison test?

Stuck on part iii, I am not sure what I've done wrong as my answer seems correct! any help wil be appreciated. And err, I can't seem to do part (iv) and (v), any help will be appreciated, thanks!

Diff Eq's -- orthogonal polynomials [PLAIN]http://img27.imageshack.us/img27/566/39985815.jpg I managed to do the first part, stuck in the part circled. Any help will be appreciated, thanks.