Department of Mathematics
and Statistics
Atlantic Algebra
Centre
People
Research
Undergraduate
Graduate
Faculty of Science
Libraries
Yorck Sommerhäuser
Address:
Memorial University of Newfoundland
Department of Mathematics and Statistics
St. John's, NL
Canada
A1C 5S7
Email:
sommerh@mun.ca
sommerh@mathematik.uni-muenchen.de
Phone/Fax:
Phone: 001 709 864 8097
Fax: 001 709 864 3010
Teaching:
Courses
Seminars
Videos:
Algebraische Zahlentheorie
On central character rings
Hopf algebras: History, achievements and problems
Publications:
On isomorphisms between certain Yetter-Drinfel'd Hopf algebras
On biproducts and extensions
Hochschild cohomology, modular tensor categories, and mapping class groups
On cores in Yetter-Drinfel'd Hopf algebras
Hochschild cohomology and the modular group
Triviality theorems for Yetter-Drinfel'd Hopf algebras
On the notion of a ribbon quasi-Hopf algebra
On the central charge of a factorizable Hopf algebra
Hopf algebras and congruence subgroups
On higher Frobenius-Schur indicators
Hopf-cyclic homology and cohomology with coefficients
Stable anti-Yetter-Drinfel'd modules
Self-dual modules of semisimple Hopf algebras
Yetter-Drinfel'd Hopf algebras over groups of prime order
On Kaplansky's conjectures
Ribbon transformations, integrals, and triangular decompositions
On Kaplansky's fifth conjecture
Kac-Moody algebras
Deformed enveloping algebras
Lectures:
Conference talks
Colloquia and seminar talks
Recent and upcoming talks
Miscellaneous:
Biographical data
Internet links
Old homepage in Munich
Last modification: January 7, 2025
