Journal of the Ramanujan Mathematical Society

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On Nori’s Obstruction to Universal Bundles


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1 Department of Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada
     

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Let G be SLn, Sp2n or SO2n. We consider the moduli space M of semistable principal G-bundles over a curve X. Our main result is that if U is a Zariski open subset of M then there is no universal bundle on U×X.
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  • On Nori’s Obstruction to Universal Bundles

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Authors

Emre Coskun
Department of Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada
Ajneet Dhillon
Department of Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada
Nicole Lemire
Department of Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada

Abstract


Let G be SLn, Sp2n or SO2n. We consider the moduli space M of semistable principal G-bundles over a curve X. Our main result is that if U is a Zariski open subset of M then there is no universal bundle on U×X.