Recent content by fcsc

I am trying to solve a volume problem, it is very simple and can be easly solved if the space is parametrized and then integrated. However, it should also have to be possible to solve the problem by more axiomatic means. The first version of the problem is: assume that you have a triangle...

I'm completely agree with your point Ich, i know you speak about 3-vectors i don't explain weel myself, my problem is that i don't have U, or PU because these is what i need to define from \Delta_{ij}. Thank you to everybody, these forum is just great ;)

Thanks everybody for these quick answer, tiny-tim, is these demostration the one I'm looking for, would you have an idea in how to find the energy and momentum. Dale and Ich, you had been helpful too but I'm looking for 3-vectors.

I'm not completely sure were this post must be (math or here). But i got a question, I want to define velocity, momentum and energy. These looks like a simple task but let me explain the problem. I'm working in the Minkowski space, and the lorentz transformations (just geometrical one's)...