fn m(&self) -> usize {
        self.b.len()
        //           == self.minus_pi.len()
        //           == self.basis_inverse_rows.len()
        //           == self.basis_inverse_rows[0].len()
        //           == ...
        //           == self.basis_inverse_rows[self.m() - 1].len()
    }
/// A property of the dimensions of this matrix.
///
/// A `Carry` is always square matrix of size `m + 1` times `m + 1`. Here, `m` is the
/// length of the constraint column vector and the width of the `minus_pi` row vector. Also, the
/// basis inverse submatrix B^-1 has dimension `m` times `m`.
A property of the dimensions of this matrix.
A property of the dimensions of this matrix .
fn m(&self) -> usize {
        self.b.len()
        //           == self.minus_pi.len()
        //           == self.basis_inverse_rows.len()
        //           == self.basis_inverse_rows[0].len()
        //           == ...
        //           == self.basis_inverse_rows[self.m() - 1].len()
    }
fn m ( & self ) -> usize { self . b . len ( ) //           == self.minus_pi.len() //           == self.basis_inverse_rows.len() //           == self.basis_inverse_rows[0].len() //           == ... //           == self.basis_inverse_rows[self.m() - 1].len() }
A property of the dimensions of this matrix.
A property of the dimensions of this matrix .
&self
&self