Geometry of hyperfields

J Jun - Journal of Algebra, 2021 - Elsevier
Given a scheme X over Z and a hyperfield H which is equipped with a topology which
satisfies certain conditions, we endow the set X (H) of H-rational points with a natural …

Tropical spectrahedra

X Allamigeon, S Gaubert, M Skomra - Discrete & Computational Geometry, 2020 - Springer
We introduce tropical spectrahedra, defined as the images by the nonarchimedean
valuation of spectrahedra over the field of real Puiseux series. We provide an explicit …

Notes on valuation theory for Krasner hyperfields

A Linzi - Israel Journal of Mathematics, 2025 - Springer
The main aim of this article is to study and develop valuation theory for Krasner hyperfields.
In analogy with classical valuation theory for fields, we generalise the formalism of valuation …

[HTML][HTML] Massively parallel computation of tropical varieties, their positive part, and tropical Grassmannians

D Bendle, J Böhm, Y Ren, B Schröter - Journal of symbolic computation, 2024 - Elsevier
We present a massively parallel framework for computing tropicalizations of algebraic
varieties which can make use of symmetries using the workflow management system GPI …

The real tropical geometry of neural networks for binary classification

MC Brandenburg, G Loho, G Montufar - Transactions on Machine …, 2024 - openreview.net
We consider a binary classifier defined as the sign of a tropical rational function, that is, as
the difference of two convex piecewise linear functions. In particular, the set of functions …

The Fundamental theorem of tropical differential algebra over nontrivially valued fields and the radius of convergence of nonarchimedean differential equations

S Mereta, F Gallinaro - arxiv preprint arxiv:2303.12124, 2023 - arxiv.org
We prove a fundamental theorem for tropical partial differential equations analogue of the
fundamental theorem of tropical geometry in this context. We extend results from Aroca et al …

Signed tropical halfspaces and convexity

G Loho, M Skomra - arxiv preprint arxiv:2206.13919, 2022 - arxiv.org
We extend the fundamentals for tropical convexity beyond the tropically positive orthant
expanding the theory developed by Loho and V\'egh (ITCS 2020). We study two notions of …

Real and Positive Tropicalizations of Symmetric Determinantal Varieties

AA Ahmadieh, M Cai, J Yu - arxiv preprint arxiv:2409.17462, 2024 - arxiv.org
We study real and positive tropicalizations of the varieties of low rank symmetric matrices
over real or complex Puiseux series. We show that real tropicalization coincides with …

A result of Krasner in categorial form

A Linzi - Mathematics, 2023 - mdpi.com
In 1957, M. Krasner described a complete valued field (K, v) as the inverse limit of a system
of certain structures, called hyperfields, associated with (K, v). We put this result in purely …

Maximal Mumford curves from planar graphs

M Kummer, B Sturmfels, R Vlad - arxiv preprint arxiv:2404.11838, 2024 - arxiv.org
Maximal Mumford Curves from Planar Graphs arxiv:2404.11838v1 [math.AG] 18 Apr 2024 Page
1 Maximal Mumford Curves from Planar Graphs Mario Kummer, Bernd Sturmfels and Raluca …