method

det

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det() public

Returns the determinant of A, calculated efficiently from the factorization.

# File lib/matrix/lup_decomposition.rb, line 78
    def det
      if (@row_size != @col_size)
        Matrix.Raise Matrix::ErrDimensionMismatch unless square?
      end
      d = @pivot_sign
      @col_size.times do |j|
        d *= @lu[j][j]
      end
      d
    end

det

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