Recent content by drlang

Hi Fredrik I am using the terms he used. Can you clarify the difference between tangent vector and gradient vector. Maybe that would help me.

Hi I am trying to learn about covariant and contravariant vectors and derivatives. The videos I have been watching talk about displacement vector as the basis for contravariant vectors and gradient as the basis for covariant vectors. Can someone tlel me the difference between displacemement...

Hi I am trying to learn about covariant and contravariant vectors and derivatives. The videos I have been watching talk about displacement vector as the basis for contravariant vectors and gradient as the basis for covariant vectors. Can someone tlel me the difference between displacemement...

What is itunes ?

Thanks for all your help. I do not have an I pod or do I know how to use one.

Hi Although I like the Suskind lectures and follow the material pretty well, I find the task downloading the lectures from web too much. This is why I wanted to buy them. I use IE and my patience for computer tasks like this is short. Maybe I could buy the discs form you. Thank...

I do not know how to do that so I was hoping to purchase I guess.

Does anyone know where I can get Leonard Susskinds lectures on General Relativity on dvd? They are on Youtube but I would like to watch them on dvd as the downloading where I am is slow. Thanks Will this forum notify me of a reply to this post?