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# Mathematical Research Letters

## Volume 16 (2009)

### Number 6

### On dimensions of block algebras

Pages: 1011 – 1014

DOI: http://dx.doi.org/10.4310/MRL.2009.v16.n6.a9

#### Author

#### Abstract

Following a question by B. Külshammer, we show that an inequality, due to Brauer, involving the dimension of a block algebra, has an analogue for source algebras, and use this to show that a certain case where this inequality is an equality can be characterised in terms of the structure of the source algebra, generalising a similar result on blocks of minimal dimensions.