The tautological ring of $M_g$

The tautological ring of $M_g$

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Rahul Pandharipande, Princeton University
Fine Hall 322

I will talk about an approach to the ring generated by the kappa classes via the moduli space of stable quotients. The main new result (with A. Pixton) is a proof of a conjecture by Faber and Zagier of an elegant set of relations. Whether these are all the relations is an interesting question. I will discuss the data on both sides.