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Final Program
All talks were given in the Hauptgebäude, Templergraben 55: On Friday (including the "Graduiertenkolleg" talk) in Hörsaal IV and on Saturday in Hörsaal III.
Note that none of the speakers has won extra minutes from the conference game.
Friday, December 10, 2004
2.002.23pm  Jon Thackray (Cambridge): The 2modular representations of Conway's group Co_{1}, some work in progress 
2.262.43pm  Olivier Brunat (Lyon): On the characters of the Suzuki and Ree group 
coffee and discussion (from 3.154.15pm there is a talk in the "Graduiertenkolleg" by Julia Hartmann with title Differential Galois groups) [Abstract]  
4.314.52pm  Magdolna Szőke (Budapest): Computing
decompositions of modules over finite dimensional algebras
We study the problem of decomposing a finite dimensional module over an
algebra. An algorithm is given to compute a decomposition, which has been
implemented in the CMeatAxe. Finally, we compare our implementation
with the MAGMAprocedure IndecomposableSummands.

5.005.19pm  Heiko Dietrich (Braunschweig): On the groups
of cubefree order
We analyze the structure of the groups of cubefree order and, based on
this, we present an algorithm for constructing these groups up to
isomorphism.

5.265.48pm  Max Neunhöffer (Aachen): Generalized sifting
???

7.00pm??  Research Cambridge Style! (in the Greek restaurant AGORA, Gerlachstr. 2022) 
Saturday, December 11, 2004
10.0210.22am  Stefan Kohl (Stuttgart): On the structure of
the group of all residue classwise affine permutations of the integers
Residue classwise affine groups are a type of permutation groups
over infinite sets which are accessible to computations.
They naturally arise as groups of homoeomorphisms of suitable rings
endowed with a topology by taking the set of all residue classes
as a basis.
The talk will provide some information about the structure of the
group of all residue classwise affine permutations of the integers
without going into technical details, and illustrate this with some
nice examples of elements of the mentioned group.

10.3010.53am  Janka Pilnikova (Linz): Rational
parametrization of del Pezzo surfaces of degree 9
For del Pezzo surfaces of degree 9 the algebra associated to the group of
automorphisms of the surface can be very effectively used for finding a
rational parametrization. In the talk we explain how the construction of a
simple module of the algebra gives an isomorphism of the surface and the
projective plane.

11.0111.26am  Jürgen Müller (Jena): Moduli spaces and
modular invariants
We show how a problem about a certain moduli space of curves
can be solved using modular invariant theory of finite groups
and methods from computational commutative algebra and
computational representation theory.

11.3111.48am  JeanBaptiste Gramain (Lyon): Generalized
perfect isometries in some groups of Lie rank one
We prove a (weak) analogue of Broué's conjecture, exhibiting generalized
perfect isometries in three families of groups where there is none in the
sense of Broué (we study Suzuki Groups, Ree Groups of type G_{2}, and
special unitary groups SU(3,q^{2}) ).

lunch break  
1.522.14pm  Willem de Graaf (Linz): Constructing
finitelypresented Lie rings
I will describe an algorithm for constructing a
multiplication table of a finitelypresented Lie ring
that happens to be finitedimensional.

2.212.42pm  Colva M. RoneyDougal (St Andrews): The primitive groups of degree less than 2500 
2.503.11pm  Simon Nickerson
(Birmingham): Semipresentations for sporadic simple groups
Standard generators for the sporadic simple groups have been defined
by R. A. Wilson for the Web Atlas of Finite Group Representations.
We describe methods of checking that a pair of elements in a black
box group (isomorphic to a sporadic simple group or the automorphism
group of a sporadic simple group) is a pair of standard generators.

coffee break  
4.354.55pm  Beth Holmes (Birmingham): Subgroup coverings of
groups
A subgroup covering of a group is a set of subgroups whose union
contains every element of the group. Some people are interested in calculating
the minimal sizes of subgroup coverings of simple groups.

5.005.25pm  Max Horn (Darmstadt): Computations with
geometric amalgams
In a project by Gramlich, Hoffman, Nickel and Shpectorov the
simple connectedness of certain flagtransitive subgeometries of
spherical twin buildings is investigated. For the geometries
belonging to the symplectic groups, the cases Sp(6,3), Sp(6,4),
Sp(6,5), Sp(6,7) and Sp(8,2) are still open. A computerbased
construction for the groups Sp(6,3), Sp(6,4), Sp(6,5) and Sp(8,2) is
presented which yields the simple connectedness for the
corresponding geometries using coset enumeration.

5.305.50pm  John Bray (London): Good bases for lattices 
7.00pm??  Research Cambridge Style! (in the "Labyrinth") 
Anyone was welcome to attend the talks. Frank Lübeck
Final Version ( Tue, 14 Dec 2004 11:59:39 +0100 )