nLab1d ago

bibundle

Urs Schreiber
vector bundle, 2-vector bundle, (∞,1)-vector bundle real, complex/holomorphic, quaternionic Special and general types group cohomology, nonabelian group cohomology, Lie group cohomology cohomology with constant coefficients / with a local system of coefficients Special notions Variants differential cohomology Extra structure Operations Theorems A bibundle is a (groupoid-)principal bundle which is equipped with a compatible second (groupoid-)action “from the other side”. In particular, Lie...