Unimodular matrix
= Unimodular matrix
{wiki}
An integral square matrix is unimodular when its determinant is $1$ or $-1$. Its inverse again has integral entries, so it defines an invertible change of integer coordinates.
= Unimodular matrix
{wiki}
An integral square matrix is unimodular when its determinant is $1$ or $-1$. Its inverse again has integral entries, so it defines an invertible change of integer coordinates.