AntihermitianMatrixQ

AntihermitianMatrixQ[m] gives True if m is explicitly antihermitian, and False otherwise.

Examples

Test if a matrix is antihermitian:

AntihermitianMatrixQ[{{0, I}, {-I, 0}}]
(* True *)

Non-antihermitian matrix:

AntihermitianMatrixQ[{{1, 2}, {3, 4}}]
(* False *)

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