Supercharacter formulas for pattern groups

P Diaconis, N Thiem - Transactions of the American Mathematical Society, 2009 - ams.org
C. Andre and N. Yan introduced the idea of a supercharacter theory to give a tractable
substitute for character theory in wild groups such as the unipotent uppertriangular group …

Branching rules in the ring of superclass functions of unipotent upper-triangular matrices

N Thiem - Journal of Algebraic combinatorics, 2010 - Springer
It is becoming increasingly clear that the supercharacter theory of the finite group of
unipotent upper-triangular matrices has a rich combinatorial structure built on set-partitions …

A supercharacter theory for the Sylow p-subgroups of the finite symplectic and orthogonal groups

CAM André, AM Neto - Journal of Algebra, 2009 - Elsevier
We define the superclasses for a classical finite unipotent group U of type Bn (q), Cn (q), or
Dn (q), and show that, together with the supercharacters defined in [CAM André, AM Neto …

Supercharacters of the Sylow p-subgroups of the finite symplectic and orthogonal groups

CAM André, AM Neto - Pacific journal of mathematics, 2008 - msp.org
We define and study supercharacters of the classical finite unipotent groups of types B n (q),
C n (q) and D n (q). We show that the results we proved in 2006 remain valid over any finite …

Superinduction for pattern groups

E Marberg, N Thiem - Journal of Algebra, 2009 - Elsevier
It is well known that the representation theory of the finite group of unipotent upper-triangular
matrices Un over a finite field is a wild problem. By instead considering approximately …

Combinatorial methods of character enumeration for the unitriangular group

E Marberg - Journal of Algebra, 2011 - Elsevier
Let UTn (q) denote the group of unipotent n× n upper triangular matrices over a field with q
elements. The degrees of the complex irreducible characters of UTn (q) are precisely the …

[HTML][HTML] A supercharacter theory for involutive algebra groups

CAM André, PJ Freitas, AM Neto - Journal of Algebra, 2015 - Elsevier
If J is a finite-dimensional nilpotent algebra over a finite field k, the algebra group P= 1+ J
admits a (standard) supercharacter theory as defined in [16]. If J is endowed with an …

Restricting supercharacters of the finite group of unipotent uppertriangular matrices

N Thiem, V Venkateswaran - arXiv preprint arXiv:0712.1237, 2007 - arxiv.org
It is well-known that the representation theory of the finite group of unipotent upper-triangular
matrices $ U_n $ over a finite field is a wild problem. By instead considering approximately …

Representation zeta functions of some compact p-adic analytic groups

N Avni, B Klopsch, U Onn, C Voll - arXiv preprint arXiv:1011.6533, 2010 - arxiv.org
Using the Kirillov orbit method, novel methods from p-adic integration and Clifford theory, we
study representation zeta functions associated to compact p-adic analytic groups. In …

A Schur ring approach to supercharacters of groups associated with finite radical rings

CAM André, PJ Freitas, TZ Silva - Communications in Algebra, 2024 - Taylor & Francis
We consider the central Schur ring associated with the standard supercharacters of the
adjoint group G (A) of a finite radical ring A, and define supercharacters of the subgroup CG …