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We use a graph to define a new stability condition for algebraic moduli spaces of rational curves. We characterize when the tropical compactification of the moduli space agrees with the theory of geometric tropicalization. The…

Algebraic Geometry · Mathematics 2025-10-08 Andy Fry

We prove that Viro's patchworking produces real algebraic curves with the maximal number of real inflection points. In particular this implies that maximally inflected real algebraic $M$-curves realize many isotopy types. The strategy we…

Algebraic Geometry · Mathematics 2012-03-07 Erwan Brugallé , Lucía López de Medrano

We show that the moduli spaces of irreducible labeled parametrized marked rational curves in toric varieties can be embedded into algebraic tori such that their tropicalizations are the analogous tropical moduli spaces. These embeddings are…

Algebraic Geometry · Mathematics 2016-12-01 Andreas Gross

We study geodesics on the parameter manifold, for systems exhibiting second order classical and quantum phase transitions. The coupled non-linear geodesic equations are solved numerically for a variety of models which show such phase…

Statistical Mechanics · Physics 2015-06-11 Prashant Kumar , Subhash Mahapatra , Prabwal Phukon , Tapobrata Sarkar

We provide new forbidden criterion for realizability of smooth tropical plane curves. This in turn provides us a complete classification of smooth tropical plane curves up to genus six.

Combinatorics · Mathematics 2022-03-07 Ayush Kumar Tewari

A complete treatment of the intersections of two geodesics on the surface of an ellipsoid of revolution is given. With a suitable metric for the distances between intersections, bounds are placed on their spacing. This leads to fast and…

Geophysics · Physics 2024-04-02 Charles F. F. Karney

We consider the popular and classical method of alternating projections for finding a point in the intersection of two closed sets. By situating the algorithm in a metric space, equipped only with well-behaved geodesics and angles (in the…

Optimization and Control · Mathematics 2022-06-10 Adrian S. Lewis , Genaro López-Acedo , Adriana Nicolae

Based on a description of project networks by max-plus algebra and poset, the adjacency of critical paths is presented using tropical geometry.

Optimization and Control · Mathematics 2012-03-01 Masanori Kobayashi , Shinsuke Odagiri

The paper establishes a formula for enumeration of curves of arbitrary genus in toric surfaces. It turns out that such curves can be counted by means of certain lattice paths in the Newton polygon. The formula was announced earlier in…

Algebraic Geometry · Mathematics 2007-05-23 Grigory Mikhalkin

Intersection graphs are very important in both theoretical as well as application point of view. Depending on the geometrical representation, different type of intersection graphs are defined. Among them interval, circular-arc, permutation,…

Discrete Mathematics · Computer Science 2014-04-23 Madhumangal Pal

The tropical Grassmannian parameterizes tropicalizations of linear spaces, while the Dressian parameterizes all planes in $\TP^{n-1}$. We study these parameter spaces and we compute them explicitly for $n \leq 7$. Planes are identified with…

Combinatorics · Mathematics 2014-12-23 Sven Herrmann , Anders Jensen , Michael Joswig , Bernd Sturmfels

\textit{Harmonic amoebas} are generalisations of amoebas of algebraic curves immersed in complex tori. Introduced in \cite{Kri}, the consideration of such objects suggests to enlarge the scope of tropical geometry. In the present paper, we…

Algebraic Geometry · Mathematics 2020-02-25 Lionel Lang

Let $g_1, ..., g_k$ be tropical polynomials in $n$ variables with Newton polytopes $P_1, ..., P_k$. We study combinatorial questions on the intersection of the tropical hypersurfaces defined by $g_1, ..., g_k$, such as the $f$-vector, the…

Combinatorics · Mathematics 2009-11-26 Reinhard Steffens , Thorsten Theobald

A graph profile records all possible densities of a fixed finite set of graphs. Profiles can be extremely complicated; for instance the full profile of any triple of connected graphs is not known, and little is known about hypergraph…

Combinatorics · Mathematics 2022-02-04 Grigoriy Blekherman , Annie Raymond , Mohit Singh , Rekha R. Thomas

We study the tropicalizations of Severi varieties, which we call tropical Severi varieties. In this paper, we give a partial answer to the following question, ``describe the tropical Severi varieties explicitly.'' We obtain a description of…

Algebraic Geometry · Mathematics 2018-06-20 Jihyeon Jessie Yang

We consider optimization problems that are formulated and solved in the framework of tropical mathematics. The problems consist in minimizing or maximizing functionals defined on vectors of finite-dimensional semimodules over idempotent…

Optimization and Control · Mathematics 2014-08-05 Nikolai Krivulin

Consider a pair consisting of an abstract tropical curve and an effective divisor from the linear system associated to $k$ times the canonical divisor for $k \in \mathbb{Z}_{\geq 1}$. In this article we give a purely combinatorial criterion…

Algebraic Geometry · Mathematics 2024-09-25 Felix Röhrle , Johannes Schwab

We describe a framework to construct tropical moduli spaces of rational stable maps to a smooth tropical hypersurface or curve. These moduli spaces will be tropical cycles of the expected dimension, corresponding to virtual fundamental…

Algebraic Geometry · Mathematics 2017-05-23 Andreas Gathmann , Dennis Ochse

Using an elementary argument, we prove new fixed point theorems for classical elliptic complexes. We obtain new results for conformal relations and coisotropic intersections. We obtain theorems for the average intersections of families of…

Differential Geometry · Mathematics 2007-05-23 Mark Stern

Tropical polytopes are images of polytopes in an affine space over the Puiseux series field under the degree map. This viewpoint gives rise to a family of cellular resolutions of monomial ideals which generalize the hull complex of Bayer…

Combinatorics · Mathematics 2012-02-13 Mike Develin , Josephine Yu
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