# Abstracts for Tropical Geometry in Europe

Alternatively have a look at the program.

## Quantization and tropical geometry for toric manifolds

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Speaker:
João Nunes
Affiliation:
Instituto Superior Técnico, Lisboa
Date:
Fri, 2012-07-13 11:00 - 12:00
Location:
MPIM Lecture Hall
Parent event:
Tropical Geometry in Europe

Let X be a toric manifold. We will describe families of Kahler structures on X which are interesting from the point of view of geometric quantization. Along each family, the Kahler metric collapses in the Gromov-Hausdorff sense to a Hessian metric on the moment polytope P. Moreover, as the Kahler structure degenerates, the amoebas for hypersurfaces in X tropicalize under an appropriate Legendre transformation of P. This is based on joint work with T.Baier, C.Florentino and J.Mourao.

## Refined curve counting and refined Severi degrees

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Speaker:
Lothar Göttsche
Affiliation:
ICTP, Trieste and MPI
Date:
Fri, 2012-07-13 14:00 - 15:00
Location:
MPIM Lecture Hall
Parent event:
Tropical Geometry in Europe

This is report on joint works with Vivek Shende, Florian Block and Sam Payne.
An old conjecture of mine gives a generating function for the numbers of
$\delta$-nodal curves in linear systems on surfaces. In this talk we want
to propose a refinement of the conjecture, where the numbers of curves are
replaced by polynomials in a variable $y$, which for $y=1$ specialize to
the numbers of curves.  For rational surfaces these refined invariants are
related to Welschinger invariants and have an
interpretation in tropical geometry.

## Mutations of potentials and their upper bounds

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Speaker:
Sergey Galkin
Affiliation:
Universität Wien
Date:
Fri, 2012-07-13 15:30 - 16:30
Location:
MPIM Lecture Hall
Parent event:
Tropical Geometry in Europe

We introduce Berenstein's notion of upper bounds to theory of mutations of potentials and prove an excessive Laurent phenomenon (which now says - upper bounds are preserved by mutations) using this new technique. The statement is quite general and can be applied in different contexts where Laurent polynomials and their mutations appear (e.g. Auroux's wall-crossing in symplectic geometry and mirror symmetry). This is a joint work with John Alexander Cruz Morales (preprint IPMU 12-0110).

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