because of easiness of calculation without affecting the result to considerable extent....
Oppenheimer's notable achievements in physics include the Born-Oppenheimer approximation for molecular wavefunctions, work on the theory of electrons and positrons, the Oppenheimer-Phillips process in nuclear fusion, and the first prediction of quantum tunneling.
Lillian Oppenheimer was born in 1898.
Damon Oppenheimer was born in 1962.
Andrés Oppenheimer was born in 1951.
Bernard Oppenheimer was born in 1866.
Stephen Oppenheimer was born in 1947.
Joshua Oppenheimer was born in 1974.
Ernest Oppenheimer was born in 1880.
Ruben Oppenheimer was born in 1975.
Hillel Oppenheimer was born on April 4, 1899.
Franz Oppenheimer was born on March 30, 1864.
Frank Oppenheimer was born on 1912-08-14.