TY JOUR TI MATHEMATICAL PREDICTION OF THE POSITRON: THE TRIUMPH OF QUANTUM THEORY KW positron KW antiparticle KW Dirac equation KW negative energy KW Dirac Sea KW cosmic rays KW Anderson's discovery JO Scientific Papers Collection of the Angarsk State Technical University AU Mustafin, A.A. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»