Introduction to Relativity

[Naty1]

I've come across two online sources I really like.

To get an introduction to Tensors consider this NASA 29 page paper:

http://www.lerc.nasa.gov/WWW/K-12/Numbers/Math/documents/Tensors_TM2002211716.pdf

and for some introductory comments and insight into relativity try:

http://einstein.relativitybook.com/Einstein_gravity.html

And for a really elementary first exposure to relativity consider
http://www.einstein-online.info/en/elementary/specialRT/index.html

Have fun......

[Naty1]

Here is a free online physics texbook and a nice treatment of relativity including mathematics:

http://www.motionmountain.net/

Click on CONTENTS and scroll down to a chapter on interest...click again for details...