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Wolfgang Schmaltz

Publications and source records attributed to Wolfgang Schmaltz.

5 recordsLinked to original sources
arXiv2024

Non-fillability of overtwisted contact manifolds via polyfolds

We prove that any weakly symplectically fillable contact manifold is tight. Furthermore we verify the strong Weinstein conjecture for contact manifolds that appear as the concave boundary of a directed symplectic cobordism whose positive boundary satisfies the weak-filling condition and is overtwisted. Similar results are obtained in the presence of bordered Legendrian open books whose binding-complement has vanishing second Stiefel-Whitney class. The results are obtained via polyfolds.

math.SG↗
arXiv2020

The Steenrod problem for orbifolds and polyfold invariants as intersection numbers

The Steenrod problem for closed orientable manifolds was solved completely by Thom. Following this approach, we solve the Steenrod problem for closed orientable orbifolds, proving that the rational homology groups of a closed orientable orbifold have a basis consisting of classes represented by suborbifolds whose normal bundles have fiberwise trivial isotropy action. Polyfold theory, as developed by Hofer, Wysocki, and Zehnder, has yielded a well-defined Gromov-Witten invariant via the regularization of moduli spaces. As an application, we demonstrate that the polyfold Gromov-Witten invariants, originally defined via branched integrals, may equivalently be defined as intersection numbers against a basis of representing suborbifolds.

math.SG↗
arXiv2019

Naturality of polyfold invariants and pulling back abstract perturbations

It is possible to construct distinct polyfolds which model a given moduli space problem in subtly different ways. These distinct polyfolds yield invariants which, a priori, we cannot assume are equivalent. We provide a general framework for proving that polyfold invariants are natural, in the sense that under a mild hypothesis (the existence of an ``intermediary subbundle'' of a strong polyfold bundle) the polyfold invariants for such different models will be equal. As an application, we show that the polyfold Gromov-Witten invariants are independent of all choices made in the construction of the Gromov-Witten polyfolds. Furthermore, we show that the polyfold Gromov-Witten invariants are independent of the choice of exponential decay at the marked points. In addition, we consider the following problem. Given a map between polyfolds, we cannot naively consider the restriction of this map to the respective perturbed solution spaces. Under a mild topological hypothesis on the map, we show how to pullback abstract perturbations which then allows us to obtain a well-defined map between the perturbed solution spaces. As an application, we show that there exists a well-defined permutation map between the perturbed Gromov-Witten moduli spaces.

math.SG↗
arXiv2019

The Gromov-Witten axioms for symplectic manifolds via polyfold theory

Polyfold theory, as developed by Hofer, Wysocki, and Zehnder, is a relatively new approach to resolving transversality issues that arise in the study of $J$-holomorphic curves in symplectic geometry. This approach has recently led to a well-defined Gromov-Witten invariant for $J$-holomorphic curves of arbitrary genus, and for all closed symplectic manifolds. The Gromov-Witten axioms, as originally described by Kontsevich and Manin, give algebraic relationships between the Gromov-Witten invariants. In this paper, we prove the Gromov-Witten axioms for the polyfold Gromov-Witten invariants.

math.SG↗