ericcornelissen

// SPDX-License-Identifier: MIT-0

/// Converts a linearly stored m-by-m matrix A into a linear store of the q-by-q
/// submatrices of A. For example, given the 4-by-4 matrix:
///
/// ```no-test
/// in = [ a b c d
///        e f g h
///        h i j k
///        l m n o ]