Unimodular matrix

A unimodular matrix is a square integer matrix with a determinant of either +1 or -1. In other words, for a matrix \( A \) to be termed unimodular, it must satisfy the condition: \[ \text{det}(A) = \pm 1 \] Unimodular matrices have several important properties and applications, particularly in areas such as number theory, algebra, and the study of lattice structures.