reference for special relativity I got a student finishing its first year of Math and she would like to study a bit of special relativity from a mathematics point of view. I know the subject quite well but I don't know any basic references. what I look for her his some basic on Minkowsky? and if possible the Maxwell equation from the differential form point of view? Of course she don't know differential form yet, but she is motivated to learn. any idea willbe welcome. Thx!

There is a really lovely book by David Bressoud called Second Year Calculus: From Celestial Mechanics to Special Relativity.  He is an excellent writer and the book is a joy to read.  It gives the gentlest introduction to differential forms and special relativity that you could hope for.
https://www.springer.com/us/book/9780387976068
