Browsing by MSC "20"
Now showing items 2139 of 129

1030  Cohomology of Finite Groups: Interactions and Applications
[OWR201032] (2010)  (25 Jul  31 Jul 2010)The cohomology of finite groups is an important tool in many subjects including representation theory and algebraic topology. This meeting was the third in a series that has emphasized the interactions of group cohomology ... 
0536  Cohomology of Finite Groups: Interactions and Applications
[OWR200542] (2005)  (04 Sep  10 Sep 2005)This is a report on a meeting on interactions and applications of the cohomology of finite groups. Besides several talks on the cohomology of finite groups there were talks on related subjects, in particular on the cohomology ... 
1519  Cohomology of Finite Groups: Interactions and Applications
[OWR201524] (2015)  (03 May  09 May 2015)The cohomology of finite groups is an important tool in many subjects including representation theory and algebraic topology. This meeting was the fourth in a series that has emphasized the interactions of group cohomology ... 
1012  Combinatorial Representation Theory
[OWR201015] (2010)  (21 Mar  27 Mar 2010)The workshop brought together researchers from different fields in representation theory and algebraic combinatorics for a fruitful interaction. New results, methods and developments ranging from classical and modular ... 
0627  Computational Group Theory
[OWR200630] (2006)  (02 Jul  08 Jul 2006)This workshop on Computational Group Theory revealed the close connections between its main themes “finitely presented groups”, “permutation groups”, “matrix groups” and “representations of groups”. The meeting also presented ... 
1131  Computational Group Theory
[OWR201137] (2011)  (31 Jul  06 Aug 2011)This sixth workshop on Computational Group Theory proved that its main themes “finitely presented groups”, “$p$groups”, “matrix groups” and “representations of groups” are lively and active fields of research. The talks ... 
1631  Computational Group Theory
[OWR201637] (2016)  (31 Jul  06 Aug 2016)This was the seventh workshop on Computational Group Theory. It showed that Computational Group Theory has significantly expanded its range of activities. For example, symbolic computations with groups and their representations ... 
Computing Congruence Quotients of Zariski Dense Subgroups
[OWP201822] (Mathematisches Forschungsinstitut Oberwolfach, 20181026)We obtain a computational realization of the strong approximation theorem. That is, we develop algorithms to compute all congruence quotients modulo rational primes of a finitely generated Zariski dense group $H \leq ... 
Congruences Associated with Families of Nilpotent Subgroups and a Theorem of Hirsch
[OWP201916] (Mathematisches Forschungsinstitut Oberwolfach, 20190527)Our main result associates a family of congruences with each suitable system of nilpotent subgroups of a finite group. Using this result, we complete and correct the proof of a theorem of Hirsch concerning the class number ... 
A construction of hyperbolic Coxeter groups
[OWP201004] (Mathematisches Forschungsinstitut Oberwolfach, 2010)We give a simple construction of Gromov hyperbolic Coxeter groups of arbitrarily large virtual cohomological dimension. Our construction provides new examples of such groups. Using this one can construct e.g. new groups ... 
0931  Differentialgeometrie im Großen
[OWR200935] (2009)  (26 Jul  01 Aug 2009)The meeting continued the biannual conference series Diﬀerentialgeometrie im Großen at the MFO which was established in the 60’s by Klingenberg and Chern. Global Riemannian geometry with its connections to geometric analysis, ... 
0911  Enveloping Algebras and Geometric Representation Theory
[OWR200915] (2009)  (08 Mar  14 Mar 2009)The meeting brought together experts investigating Lie theory from the geometric, algebraic and combinatorial points of view to discuss recent progress and bring forward the research in this area by fostering scientiﬁc ... 
1210  Enveloping Algebras and Geometric Representation Theory
[OWR201213] (2012)  (04 Mar  10 Mar 2012)The workshop brought together experts investigating algebraic Lie theory from the geometric and combinatorial points of view. 
1520  Enveloping Algebras and Geometric Representation Theory
[OWR201525] (2015)  (10 May  16 May 2015)The workshop brought together experts investigating algebraic Lie theory from the geometric and categorical viewpoints. 
Experimenting with Symplectic Hypergeometric Monodromy Groups
[OWP201915] (Mathematisches Forschungsinstitut Oberwolfach, 20190522)We present new computational results for symplectic monodromy groups of hypergeometric differential equations. In particular, we compute the arithmetic closure of each group, sometimes justifying arithmeticity. The results ... 
Experimenting with Zariski Dense Subgroups
[OWP201731] (Mathematisches Forschungsinstitut Oberwolfach, 20171028)We give a method to describe all congruence images of a finitely generated Zariski dense group $H\leq SL(n, \mathbb{R})$. The method is applied to obtain efficient algorithms for solving this problem in odd prime degree ... 
1120a  Finitedimensional Approximations of Discrete Groups
[OWR201126] (2011)  (15 May  21 May 2011)The main objective of this workshop was to bring together experts from various fields, which are all interested in finite and finitedimensional approximations of infinite algebraic and analytic objects, such as groups, ... 
Freeness of MultiReflection Arrangements via Primitive Vector Fields
[OWP201710] (Mathematisches Forschungsinstitut Oberwolfach, 20170420)In 2002, Terao showed that every reflection multiarrangement of a real reflection group with constant multiplicity is free by providing a basis of the module of derivations. We first generalize Terao's result to ... 
Gcomplete reducibility in nonconnected groups
[OWP201309] (Mathematisches Forschungsinstitut Oberwolfach, 20130410)In this paper we present an algorithm for determining whether a subgroup $H$ of a nonconnected reductive group $G$ is $G$completely reducible. The algorithm consists of a series of reductions; at each step, we perform ...