On a theorem of Weiss
We prove that \(\text{tr}(XA- AX)= 0\) whenever \(XA- AX\) is a trace class operator on a separable Hilbert space \(H\), \(X\) is compact and satisfies certain conditions, and \(A\) is normal.
trace class operator on a separable Hilbert space
scientific article; zbMATH DE number 779026