Zeroing Diagonals, Conjugate Hollowization, and Characterizing Nondefinite Operators

David R. Nicholus

We prove the conjecture by Damm and Fassbender that, for real traceless matrices $L,M$, there exists orthogonal $R$ such that $\mathrm{diag}(R^{\top }LR)=(0,...,0,0,0)$ and $\math…