2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50417Following my plenary lecture on ICMP2000 I review my results concerning two closely related topics: topological quantum field theories and the problem of quantization of gauge theories. I start with old results (first examples of topological quantum field theories were constructed in my papers in late seventies) and I come to some new results, that were not published yet.High Energy Physics - Theorytext