Matrix representation for (S1+S2)^2 operator in [m1,m2] basis
HI Here's the link where the my problem is described: http://www.advancedphysics.org/forum/sh … php?t=7696 I'd be grateful if someone would go through the procedure and maybe find where it went wrong because I've allready derived the matrix using two different methods and it came out the same, yet its eigenvalues are not what I know they must be.
