TY  - JOUR 
AU  - González Rodríguez, Ramón
AU  - Rodríguez Raposo, Ana Belén
PY  - 2022
SN  - 00218693
UR  - http://hdl.handle.net/11093/3777
AB  - Let H be a cocommutative weak Hopf algebra and let (B,φB)a weak left H-module algebra. In this paper, for a twisted convolution  invertible morphism σ : H2 → B we define its obstruction θσ as a Sweedler 3-cocycle with values in the center of B. We...
LA  - eng
PB  - Journal of Algebra
TI  - Cohomological obstructions and weak crossed products over weak Hopf algebras
DO  - 10.1016/j.jalgebra.2022.07.030
ER  -