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20242026
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math.LO2026

A note on uniform finiteness in weakly o-minimal theories

Yatir Halevi, Assaf Hasson, Ya'acov Peterzil

For an -saturated weakly o-minimal expansion of an ordered group , it is shown that has uniform finiteness if and only if the colle…

math.LO2025

Topologically 1-based T-minimal Structures

Benjamin Castle, Assaf Hasson, Will Johnson

We prove group existence and structure theorems in a general setting of tame topological theories. More precisely, we identify a linear/non-linear dividing line -- called topologic…

math.LO2025

Semisimple groups interpretable in various valued fields

Yatir Halevi, Assaf Hasson, Ya'acov Peterzil

We study infinite groups interpretable in power bounded -convex, -minimal or -adically closed fields. We show that if is an interpretable definably semisimple group (i…

math.LO2025

Zilber's Trichotomy in Hausdorff Geometric Structures

Benjamin Castle, Assaf Hasson, Jinhe Ye

We give a new axiomatic treatment of the Zilber trichotomy, and use it to complete the proof of the trichotomy for relics of algebraically closed fields, i.e., reducts of the ACF-i…

math.LO2025

Reconstructing Abelian Varieties via Model Theory

Benjamin Castle, Assaf Hasson

In 2012, Zilber used model-theoretic techniques to show that a curve of high genus over an algebraically closed field is determined by its Jacobian (viewed only as an abstract grou…

math.LO2025

The infinitesimal subgroup of interpretable groups in some dp-minimal valued fields

Yatir Halevi, Assaf Hasson, Ya'acov Peterzil

We continue our local analysis of groups interpretable in various dp-minimal valued fields, as introduced in [8]. We associate with every infinite group interpretable in those…