PSL(2,23) Modulo 23
The Hecke algebra for the Projective Special Linear Group of dimension 2
over GF(23) with point stabilizer being the normalizer of a
Sylow 23-subgroup
in characteristic 23
.
The Module M
The module M is the permutation module over the prime
field of chacteristic 23, having point stablilizer
of order 253
The dimension of M is 24
.
The dimensions of the irreducible submodules modules are
23,
1
.
The module M has radical filtration (Loewy series)
1,
2
The module M has socle filtration (socle series)
1,
2
The Action Algebra
The action algebra A is the image of kG in the
k-endomorphism ring of M. It's simple modules are the irreducible
submodules of M.
The dimensions of the projective modules are
23,
1
.
The cartan matrix of A is
The determinant of the Cartan matrix is 1.
The blocks of A consist of the following irreducible
modules: