Schwinger's Quantum Action Principle: From Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh method, quantum field theory, to source theory

RT @pascalkwanten: Kimball Milton the "Freeman Dyson" of the "Quantum Action Principles";-): "Schwinger's Quantum Action Principle: From Di…

RT @pascalkwanten: Kimball Milton the "Freeman Dyson" of the "Quantum Action Principles";-): "Schwinger's Quantum Action Principle: From Di…

RT @pascalkwanten: Kimball Milton the "Freeman Dyson" of the "Quantum Action Principles";-): "Schwinger's Quantum Action Principle: From Di…

RT @pascalkwanten: "Schwinger's Quantum Action Principle: From Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh…