collaborators

1 paper

math.AG2001

Constructions of nontautological classes on moduli spaces of curves

T. Graber, R. Pandharipande

We construct explicit examples of algebraic cycles in \bar M_g (for large g congruent to 2 mod 4) and in M_2,20 (no bar) which are not in the tautological ring. In an appendix we g…