On Friday, December 19, 2014 7:20:58 AM UTC+1, Alok Gahlot wrote: > Dear member of the groups , i have a problem i basics ., my question is > what is the difference in contravariant and covariant tensor >
http://en.wikipedia.org/wiki/Covariance_and_contravariance_of_vectors For questions about math itself I would suggest you to use mathoverflow. and how can we decide to choose tensor in any problem? what is the rule > by which we know that we use covariant or contravariant or mixed tensor ? > If you have a metric, covariant and contravariant representations are equivalent (you can raise/lower the index by using the metric), so it doesn't really matter. Anyways, it depends on what you are working with. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/918a6c47-150d-4f2e-91c5-d6b3328b5d13%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
