CIEM 05476
CENTRO DE INVESTIGACION Y ESTUDIOS DE MATEMATICA
Unidad Ejecutora - UE
artículos
Título:
Examples of weak Hopf algebras arising from vacant double groupoids
Autor/es:
NICOLÁS ANDRUSKIEWITSCH; JUAN MARTÍN MOMBELLI
Revista:
NAGOYA MATHEMATICAL JOURNAL
Editorial:
Universidad de Nagoya
Referencias:
Lugar: Nagoya; Año: 2006 vol. 181 p. 1 - 27
ISSN:
0027-7630
Resumen:
We construct explicit examples of weak Hopf algebras (actually facealgebras in the sense of Hayashi) via vacant double groupoids as explainedin [AN]. To this end, we first study the Kac exact sequence for matched pairsof groupoids and show that it can be computed via group cohomology. Thenwe describe explicit examples of finite vacant double groupoids.
