The expression above all use the Condon–Shortley phase convention which is favored by quantum physicists. Other conventions exist for the phase of the spherical harmonics. Under these different conventions the and orbitals may appear, for example, as the sum and difference of and , contrary to what is shown above.
The expression above all use the Condon–Shortley phase convention which is favored by quantum physicists Other conventions exist for the phase of the spherical harmonics Under these different conventions the and orbitals may appear for example as the sum and difference of and  contrary to what is shown above