2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54408After a brief historical comment on the study of BRS(or BRST) symmetry , we discuss the quantization of gauge theories with Gribov copies. A path integral with BRST symmetry can be formulated by summing the Gribov-type copies in a very specific way if the functional correspondence between $τ$ and the gauge parameter $ω$ defined by $τ(x) = f( A_μ^ω(x))$ is ``globally single valued'', where $f( A_μ^ω(x)) = 0 $ specifies the gauge condition. As an example of the theory which satisfies this criterion, we comment on a soluble gauge model with Gribov-type copies recently analyzed by Friedberg, Lee, Pang and Ren. We also comment on a possible connection of the dynamical instability of BRST symmetry with the Gribov problem on the basis of an index notion.20 pages plus 1 figure. To be published in the Proceedings of International Symposium on BRS Symmetry(Universal Academy Press, Tokyo)High Energy Physics - Theorytext