The University of Michigan Combinatorics Seminar


Abstract 

Floor diagrams are combinatorial objects inspired by tropical
geometry.
They enumerate algebraic plane curves satisfying point and tangency
conditions, thus providing a
LittlewoodRichardson type rule for some intersection numbers on the
moduli space of curves (or, rather, of stable maps). We extend the
combinatorics of floor diagrams to allow curve counts with additional
conditions given by ``Psiclasses'' (which are crucial in
GromovWitten theory), and present a new correspondence theorem in
tropical geometry.
