Seminar on Algebraic Geometry The structure of square roots of theta-nulls on M_g

Date
2009-06-16 15:00 - 2009-06-16 16:00
Place
Faculty of Science Building #3 Room 202
Speaker/Organizer
Nick Shepherd-Barron (University of Cambridge)
 
It is known that the vanishing of an eventheta-null defines a divisor of multiplicity 2 on the moduli space M_g of curves. We givea determinantal description of this.