IsAntidiagonal

Tests if a matrix is antidiagonal.

Syntax

• IsAntidiagonal(A[, ε])

  • A is a matrix

  • ε is a positive number

Description

If A is a matrix then IsAntidiagonal(A, ε) is true iff A is square and i ≠ n − j + 1 implies A[i, j] is zero (with epsilon ε) where n is the size of A.

Examples

IsAntidiagonal(❨❨0, 4❩, ❨1, 0❩❩)

true

See also

• IsDiagonal

• IsReversal