Recent content by MSUmath

They are inconsistent because the statement in the first post is incorrect. The correct relation to prove is the second.

I should point out that the end of the above problem is to show that B\left|a\right\rangle = const. \left|a +\lambda\right\rangle

Homework Statement Given a Hermitian operator A = \sum \left|a\right\rangle a \left\langle a\right| and B any operator (in general, not Hermitian) such that \left[A,B\right] = \lambdaB show that B\left|a\right\rangle = const. \left|a\right\rangle Homework Equations Basically those...