Meaning of superdiagonal | Babel Free

Definitions

The diagonal of a matrix that lies directly above and to the right of the main diagonal.

Examples

“We classify all free spectrahedra that are circular, that is, closed under multiplication by exp(i t): up to unitary equivalence, the coefficients of a minimal LMI defining a circular free spectrahedron have a common block decomposition in which the only nonzero blocks are on the superdiagonal.”

CEFR level