 Bogoliubov–Parasyuk theorem

The Bogoliubov–Parasyuk theorem is a result in the field of quantum field theory, specifically regarding the renormalization of certain types of divergent integrals that arise in perturbative calculations. Named after the physicists Nikolay Bogoliubov and Oleg Parasyuk, the theorem addresses the problems associated with the infinities that appear in the calculation of physical phenomena in quantum field theories.