I have a feeling that for any n x n non-trivial matrix A, trace(A*A) is always positive.(adsbygoogle = window.adsbygoogle || []).push({});

Is it true?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# [solved] trace(A*A) is always positive?

**Physics Forums | Science Articles, Homework Help, Discussion**