Recent content by drnickriviera

The teacher covers the same distance both ways. You know that the distance he covered in all is twice that, and the time it took him each way can be obtained in terms of that distance. The average speed will just be the ratio of the total time to the total distance.

All right, and thanks for your response, but what is the differential of each function? Is it equivalent to the total derivative? Also, what does one-to-oneness imply for d\mathbf{x}_q? Is it the regular function definition for one-to-one?

Hello everyone, I'm just getting into differential geometry at the moment and I am confused about one of the conditions in the definition of a regular surface. It is the regularity condition. I'll include the whole definition here for the sake of completeness. A subset S\subset...

Ok, that works. Thanks a lot!

I'm sorry, I don't really understand how those two (the original expression and the linear function) are equivalent. Could you explain a little more deeply?

Homework Statement This is a problem from D'Inverno's "Introducing Einstein's Relativity". If vAB is the velocity of B with respect to A, vBC is the velocity of C with respect to B, and vAC is the velocity of C with respect to A (all velocities are in relativistic units, that is, c=1)...