activity
20072025
most citedTopological quantum field theory structure on symplectic cohomology

77 citations · 260 across the 12 of their papers we have counts for

collaborators

12 papers

math.SG2025

Quantum cohomology and Floer invariants of semiprojective toric manifolds

Alexander F. Ritter, Filip Živanović

We use Floer theory to describe invariants of symplectic -manifolds admitting several commuting -actions. The -actions induce filtrations…

math.SG2024

Filtrations on equivariant quantum cohomology and Hilbert-Poincaré series

Alexander F. Ritter, Filip Živanović

We prove that Floer theory induces a filtration by ideals on equivariant quantum cohomology of symplectic manifolds equipped with a -action. In particular, this gives…

math.SG2023

Filtrations on quantum cohomology via Morse-Bott-Floer Spectral Sequences

Alexander F. Ritter, Filip Živanović

Using Morse-Bott-Floer spectral sequences, we describe a filtration by ideals on quantum cohomology for symplectic manifolds with a Hamiltonian -action that extends to a pseud…

math.SG2023

Filtrations on quantum cohomology from the Floer theory of -actions

Alexander F. Ritter, Filip Živanović

We construct a filtration by ideals on quantum cohomology for symplectic manifolds with a Hamiltonian -action that extends to a pseudoholomorphic -action. These…

math.SG2018★ 6 cited

Invariance of symplectic cohomology and twisted cotangent bundles over surfaces

Gabriele Benedetti, Alexander F. Ritter

We prove that symplectic cohomology for open convex symplectic manifolds is invariant when the symplectic form undergoes deformations which may be non-exact and non-compactly suppo…

math.SG2018

The McKay correspondence for isolated singularities via Floer theory

Mark McLean, Alexander F. Ritter

We prove the generalised McKay correspondence for isolated singularities using Floer theory. Given an isolated singularity \C^n/G for a finite subgroup G in SL(n,\C) and any crepan…

math.SG2014★ 12 cited

Circle-actions, quantum cohomology, and the Fukaya category of Fano toric varieties

Alexander F. Ritter

We define a class of non-compact Fano toric manifolds, called admissible toric manifolds, for which Floer theory and quantum cohomology are defined. The class includes Fano toric n…

math.SG2012★ 55 cited

The monotone wrapped Fukaya category and the open-closed string map

Alexander F. Ritter, Ivan Smith

We build the wrapped Fukaya category W(E) for any monotone symplectic manifold, convex at infinity. We define the open-closed and closed open-string maps. We study their algebraic…

math.SG2011★ 47 cited

Floer theory for negative line bundles via Gromov-Witten invariants

Alexander F. Ritter

Let M be the total space of a negative line bundle over a closed symplectic manifold. We prove that the quotient of quantum cohomology by the kernel of a power of quantum cup produ…

math.SG2010★ 77 cited

Topological quantum field theory structure on symplectic cohomology

Alexander F. Ritter

We construct the TQFT on symplectic cohomology and wrapped Floer cohomology, possibly twisted by a local system of coefficients, and prove that the TQFT respects Viterbo restrictio…

math.SG2009★ 36 cited

Deformations of symplectic cohomology and exact Lagrangians in ALE spaces

Alexander F. Ritter

We prove that the only exact Lagrangian submanifolds in an ALE space are spheres. ALE spaces are the simply connected hyperkahler manifolds which at infinity look like C^2/G for an…

math.SG2007★ 27 cited

Novikov-symplectic cohomology and exact Lagrangian embeddings

Alexander F. Ritter

Let L be an exact Lagrangian submanifold inside the cotangent bundle of a closed manifold N. We prove that if N satisfies a mild homotopy assumption then the image of π_2(L) in π_2…