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We construct a cocycle model for complex analytic equivariant elliptic cohomology that refines Grojnowski's theory when the group is connected and Devoto's when the group is finite. We then construct Mathai--Quillen type cocycles for…

Algebraic Topology · Mathematics 2021-01-01 Daniel Berwick-Evans , Arnav Tripathy

We compare strongly recursive tropical linear series as defined by Farkas, Jensen, and Payne with combinatorial limit linear series as defined by Amini and Gierczak. We show that strongly recursive tropical linear series of rank $r$ are…

Algebraic Geometry · Mathematics 2025-10-06 Eric Burkholder

We construct an analog of the Hodge theory on complex manifolds on tropical curves. We use the analytical approach to the problem, it is based on language of tropical differential forms and methods of $L^2-$cohomologies.

Algebraic Geometry · Mathematics 2023-04-11 Yury Eliyashev

Tropical recurrent sequences are introduced satisfying a given vector (being a tropical counterpart of classical linear recurrent sequences). We consider the case when Newton polygon of the vector has a single (bounded) edge. In this case…

Algebraic Geometry · Mathematics 2020-02-06 Dima Grigoriev

We propose a generalization of tropical curves by dropping the rationality and integrality requirements while preserving the balancing condition. An interpretation of such curves as critical points of a certain quadratic functional allows…

Algebraic Geometry · Mathematics 2018-12-04 Sergei Lanzat , Michael Polyak

We introduce a cap product pairing for homology and cohomology of tropical cycles on integral affine manifolds with singularities. We show the pairing is perfect over $\mathbb{Q}$ in degree one when the manifold has at worst symple…

Algebraic Geometry · Mathematics 2021-12-08 Helge Ruddat

Chambert-Loir and Ducros have recently introduced a theory of real valued differential forms and currents on Berkovich spaces. In analogy to the theory of forms with logarithmic singularities, we enlarge the space of differential forms by…

Algebraic Geometry · Mathematics 2017-02-01 Walter Gubler , Klaus Kuennemann

We define a theory of real $(p,q)$-forms and currents on Berkovich spaces which is parallel to the theory of differential forms on complex spaces. It is based on Lagerberg's theory of superforms in tropical geometry and on the consideration…

Algebraic Geometry · Mathematics 2025-07-29 Antoine Chambert-Loir , Antoine Ducros

We construct virtual fundamental classes in all intersection theories including Chow theory, K-theory and algebraic cobordism for quasi-projective Deligne-Mumford stacks with perfect obstruction theories and prove the virtual pullback…

Algebraic Geometry · Mathematics 2021-06-16 Young-Hoon Kiem , Hyeonjun Park

We construct a tropical analogue of the Poincar\'e bundle and prove a (cohomological) Fourier-Mukai transform for real tori with integral structures. We then prove a tropical analogue of Beauville's generalized Poincar\'e formula for…

Algebraic Geometry · Mathematics 2025-03-18 Soham Ghosh , Farbod Shokrieh

L\'opez de Medrano, Rinc\'on and Shaw defined the Chern classes on tropical manifolds as an extension of their theory of the Chern-Schwartz-MacPherson cycles on matroids. This makes it possible to define the Riemann-Roch number of tropical…

Algebraic Geometry · Mathematics 2024-03-29 Yuki Tsutsui

We use a vector field flow defined through a cubulation of a closed manifold to reconcile the partially defined commutative product on geometric cochains with the standard cup product on cubical cochains, which is fully defined and…

Algebraic Topology · Mathematics 2021-06-14 Greg Friedman , Anibal M. Medina-Mardones , Dev Sinha

A key issue in tropical geometry is the lifting of intersection points to a non-Archimedean field. Here, we ask: Where can classical intersection points of planar curves tropicalize to? An answer should have two parts: first, identifying…

Algebraic Geometry · Mathematics 2014-03-04 Ralph Morrison

In this paper, the tropical Nevanlinna theory is extended for piecewise polynomial continuous functions. By constructing the $n$-th Poisson-Jensen formula, the $n$-th tropical counting, proximity, and characteristic functions are…

Algebraic Geometry · Mathematics 2026-02-04 Risto Korhonen , Chengliang Tan

In this paper, we generalise the construction of the functorial pullback of refined unramified cohomology between smooth schemes, by following the ideas of Fulton's intersection theory and Rost's cycle modules. We also define standard…

Algebraic Geometry · Mathematics 2025-01-08 Kees Kok , Lin Zhou

Let $X$ be a smooth geometrically connected projective curve of genus two over a complete non-archimedean field $K$. For discretely valued $K$, the first main theorem in \cite{liu} gives a set of criteria on the Igusa invariants of the…

Algebraic Geometry · Mathematics 2021-10-07 Paul Alexander Helminck

The goal of this work is to construct integral Chern classes and higher cycle classes for a smooth variety over a perfect field of characteristic p>0 that are compatible with the rigid Chern classes defined by Petrequin. The Chern classes…

Number Theory · Mathematics 2014-06-17 Veronika Ertl

Recently, Baker and Norine have proven a Riemann-Roch theorem for finite graphs. We extend their results to metric graphs and thus establish a Riemann-Roch theorem for divisors on (abstract) tropical curves.

Combinatorics · Mathematics 2007-07-11 Andreas Gathmann , Michael Kerber

The Witten $r$-spin class defines a non-semisimple cohomological field theory. Pandharipande, Pixton and Zvonkine studied two special shifts of the Witten class along two semisimple directions of the associated Dubrovin--Frobenius manifold…

Algebraic Geometry · Mathematics 2024-04-12 Séverin Charbonnier , Nitin Kumar Chidambaram , Elba Garcia-Failde , Alessandro Giacchetto

We consider the variation of tropical Hodge structure (TVHS) associated to families of tropical varieties. The family of the tropical intermediate Jacobians of the associated tropical Hodge structure defines a bundle of tropical Jacobians,…

Algebraic Geometry · Mathematics 2020-12-25 Mohammad Reza Rahmati
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