Hey all!
I'm trying to learn \LaTeX, and so far I'm doing fine. However, I would like to know if it is possible to be able to find out if a particular environment is in use at a certain point. Basically, I was wondering if something like:
\isInUse{math}
exists in LaTeX. Does anyone...
Hey all,
Consider the system X' = f(X), where X is a square matrix. I would like to solve this system with MATLAB, but all of its solvers require X to be a column vector.
Of course, it would be possible to rewrite X' and f(X) as column vectors, but I guess some efficiency would be lost. It...
Hey all,
Suppose I have a MATLAB function that returns two (or more) output arguments, but I only care about the second one, and I do not wish to assign the value of the first one to a variable.
What bugs me is when, for example, I solve an ODE:
[t, x] = ode45(blablabla)
and then...
Fourier transform --> power spectrum
Hey all!
I've been learning about the discrete Fourier transform (and FFT too) recently. What I don't understand is why applying it to a signal gives its power spectrum. I am not really good in physics, so to me it just seems like a magical formulae, one...
I love geometry :)
Hey all!
This is one problem I haven't been able to solve. I've had a class on theorems relative to circles and triangles but I still can't figure this one out.
3 identical, equilateral triangles are placed as seen on the attachment. Their sides measure 28cm, and the...
Hey all,
I'm having trouble setting initial conditions when solving differential equations in Maple. Here's the equation:
\theta(t)''+4\pi^2 sin(\theta(t))=0, with \theta(0)=A and \theta'(0)=B as initial conditions.
I'd like to solve it with a command like...
Hey all,
I'm a math students, and I've got physics homeworks to do, and... I need some help :smile:
To make it short, I solved the approximation of the differential equation of the angle of a pendulum in function of time, and I got this...
Hi all,
I'm having a hard time proving something. Let's say you have a triangle with a 90° angle. How can I prove that the lenght of the segment between the middle of the hypotenuse and the 90° angle is half the lenght of the hypotenuse itself?
Here's a little pic to help you...
Thanks...