(self)
return self[0, 1]
The B parameter of the Matrix.

        Examples
        ========

        >>> from sympy.physics.gaussopt import RayTransferMatrix
        >>> mat = RayTransferMatrix(1, 2, 3, 4)
        >>> mat.B
        2
The B parameter of the Matrix.
The B parameter of the Matrix .
def B(self):
        """
        The B parameter of the Matrix.

        Examples
        ========

        >>> from sympy.physics.gaussopt import RayTransferMatrix
        >>> mat = RayTransferMatrix(1, 2, 3, 4)
        >>> mat.B
        2
        """
        return self[0, 1]
def B ( self ) : return self [ 0 , 1 ]