Groupoids and relations among Reidemeister and among Nielsen numbers
Keywords: نقاط ثابت; primary; 55M20; secondary; 57S30; 57N99; 57T15; 54H25; Groupoids; Nielsen theory; Fixed points; Coincidences; Root theory; Index; Semi-index; Reidemeister number; Twisted conjugacy classes; Nilmanifold; Solvmanifold; Infra-nilmanifold; Infra-solvmanifold;