Mathematical aspects of the quantum theory of fields / K.O. Friedrichs Quantum theory of fields. Friedrichs, K. O. (Kurt Otto), 1901-1983. Quantum field theory. 530.1 FRM Parts 1-5 published in Communications on pure and applied mathematics, v. 4-6, 1951-53. Includes bibliographical references at the end of the each chapter New York : Interscience Publishers, c1953. c1953. 1953 Text viii, 272 p. : eng