The Quarterly Journal of Mathematics Advance Access originally published online on October 23, 2007
The Quarterly Journal of Mathematics 2008 59(3):379-388; doi:10.1093/qmath/ham041
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BIALGEBRAS AND CATERPILLARS

Department of Mathematics, University of Oxford, Oxford, UK
E-mail: turnerw{at}maths.ox.ac.uk
Received 14 February 2007;
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We describe a double construction, which associates a symmetric associative algebra to a bialgebra. We show how a block of a finite group with cyclic defect can be realised via this double construction, after a felicitous choice of bialgebra.