class Matrix::LUPDecomposition
def det
def det if (@row_count != @column_count) raise Matrix::ErrDimensionMismatch end d = @pivot_sign @column_count.times do |j| d *= @lu[j][j] end d end
def det if (@row_count != @column_count) raise Matrix::ErrDimensionMismatch end d = @pivot_sign @column_count.times do |j| d *= @lu[j][j] end d end