Seminarium "The Trans-Carpathian Seminar on Geometry & Physics"
sala 106 IM PAN, ul. Śniadeckich 8, Ip
2014-11-19 (14:15) 
Piotr Stachura (KMMF)
Short and biased introduction to groupoids
The approach to groupoids started by S. Zakrzewski will be recalled. In particular various (but equivalent) definitions of morphisms and actions of groupoids will be presented with examples (mainly on algebraic level).