Unitary representations with non-zero cohomology
Units in the Modular Function Field. IV. The Siegel Functions are Generators.
Units in the Modular Function Field. V. Iwasawa Theory in the Modular Tower.
Universal tessellations.
All maps of type (m,n) are covered by a universal map M(m,n) which lies on one of the three simply connected Riemann surfaces; in fact M(m,n) covers all maps of type (r,s) where r|m and s|n. In this paper we construct a tessellation M which is universal for all maps on all surfaces. We also consider the tessellation M(8,3) which covers all triangular maps. This coincides with the well-known Farey tessellation and we find many connections between M(8,3) and M.
Untere Schranken für den ersten Eigenwert des Laplace-Operators auf kompakten Riemannschen Flächen.
Untergruppen der GL2, welche durch homogene lineare Kongruenzen definiert sind.
Untervarietäten der Sieglschen Modulmannigfaltigkeiten von allgemeinem Typ.