**SMS scnews item created by John Enyang at Wed 18 Sep 2013 1333**

Type: Seminar

Distribution: World

Expiry: 20 Sep 2013

**Calendar1: 20 Sep 2013 1205-1255**

**CalLoc1: Carslaw 373**

Auth: enyang@penyang.pc (assumed)

### Algebra Seminar

# Homomorphisms between cell modules of the Brauer algebra

### Enyang

###### Friday 20th September, 12:05-12:55pm, Carslaw 373

###### Speaker:

John Enyang (University of Sydney)

###### Title:

Homomorphisms between cell modules of the Brauer algebra

###### Abstract:

In the generic or semisimple setting, for instance where \(z\) is an indeterminant, there are necessarily no non-zero homomorphisms between the cell modules of the Brauer algebra \( B_k(z)\).
In analogy with the work of P. Martin on partition algebras, we show that the representation theory over a field of characteristic zero of non-generic specialisations \( B_k(n)\) of \(B_k(z)\), for \(n\in\mathbb{Z}\), is controlled by homomorphisms between the cell modules of \( B_k(n)\).

We then construct certain families of homomorphisms between cell modules of \(B_k(n)\) and use these homomorphisms to obtain associated decomposition numbers for the Brauer algebras.

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We will go to lunch after the talk.

See the Algebra Seminar web page for information about other seminars in the series.

John Enyang John.Enyang@sydney.edu.au