New posts in triangularization

Conditions for Schur decomposition and its generalization

linear-algebra matrices matrix-decomposition triangularization schur-decomposition

Proof of a theorem on simultaneous diagonalization from Hoffman and Kunze.

linear-algebra matrices diagonalization triangularization

Determinant of a block skew-symmetric matrix

linear-algebra matrices determinant block-matrices triangularization

Is there an abstract definition of a matrix being "upper triangular"?

linear-algebra matrices change-of-basis triangularization