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We prove new (sharp) Liouville-type properties via degenerate Hadamard three-sphere theorems for fully nonlinear equations structured over Heisenberg vector fields. As model examples, we cover the case of Pucci's extremal operators…

Analysis of PDEs · Mathematics 2024-12-03 Alessandro Goffi

Let $L$ be a nef and big line bundle on a scheme $X$. It is well known that if $X$ is a projective over a field then the augmented base locus and the exceptional base locus agree. This result is extended to projective schemes over arbitrary…

Algebraic Geometry · Mathematics 2023-02-07 Liam Stigant

In this paper, we prove existence of \emph{very weak solutions} to nonhomogeneous quasilinear parabolic equations beyond the duality pairing. The main ingredients are a priori esitmates in suitable weighted spaces combined with the…

Analysis of PDEs · Mathematics 2019-01-16 Karthik Adimurthi , Sun-Sig Byun , Wontae Kim

We introduce bounded category forcing axioms for well-behaved classes $\Gamma$. These are strong forms of bounded forcing axioms which completely decide the theory of some initial segment of the universe $H_{\lambda_\Gamma^+}$ modulo…

Logic · Mathematics 2021-01-11 David Aspero , Matteo Viale

We show that in a vector space over Z_3, the union of any four linear bases is an additive basis, thus proving the Additive Basis Conjecture for p=3, and providing an alternative proof of the weak 3-flow conjecture.

Combinatorics · Mathematics 2025-10-03 Yang Yu

We establish the generalized canonical bundle formula for generalized lc-trivial fibrations with irrational coefficients over non-compact bases in the complex analytic setting, and we show that the discriminant b-divisor and moduli…

Algebraic Geometry · Mathematics 2026-05-05 Kenta Hashizume

We prove that the KZ functor from a certain category of modules for the Cherednik algebra to finite dimensional modules over the Hecke algebra is essentially surjective. Then we begin to use this result to study the analog of category O for…

Representation Theory · Mathematics 2016-01-08 Daniel Thompson

We prove that if the squares of two unconditional bases are equivalent up to a permutation, then the bases themselves are permutatively equivalent. This settles a twenty year-old question raised by Casazza and Kalton in [Uniqueness of…

Functional Analysis · Mathematics 2020-02-24 Fernando Albiac , Jose L. Ansorena

We introduce a new class of Abelian groups which lies strictly between the classes of co-Hopfian groups and Dedekind-finite groups, calling these groups {\it Bassian-finite}. We prove the surprising fact that in the torsion case the…

Group Theory · Mathematics 2025-07-16 Peter V. Danchev , Patrick W. Keef

We consider the possibility of semisimple tensor categories whose fusion rule includes exactly one noninvertible simple object. Conditions are given for the existence or nonexistence of coherent associative structures for such fusion rules,…

Quantum Algebra · Mathematics 2014-10-01 Jacob Siehler

In this paper we give a complete description of the $h$-amalgamation bases in the class of non trivial abelian groups.

General Mathematics · Mathematics 2024-04-01 Mohammed Belkasmi

We show that the consistency strength of the system NFUB, a variant of Quine's "New Foundations" recently introduced by Randall Holmes, is precisely that of [ZFC - Power Set] + "There is a weakly compact cardinal''. This is a preliminary…

Logic · Mathematics 2008-02-03 Robert M. Solovay

In this paper, we consider pairs of a prime and a prime power with a fixed difference. We prove an average result on the distribution of such pairs. This is a partial improvement of the result of Bauer (1998).

Number Theory · Mathematics 2016-10-31 Yuta Suzuki

We develop general foundations of topological algebra over a linearly topologized ring k in a format applicable to both formal schemes and analytic adic spaces. We are especially interested in determining exact closed tensor categories of…

Number Theory · Mathematics 2026-04-01 Francesco Baldassarri

We explore an alternative definition of unit in a monoidal category originally due to Saavedra: a Saavedra unit is a cancellative idempotent (in a 1-categorical sense). This notion is more economical than the usual notion in terms of…

Category Theory · Mathematics 2010-03-09 Joachim Kock

With any even Hecke symmetry R (that is a Hecke type solution of the Yang-Baxter equation) we associate a quasitensor category. We formulate a condition on R implying that the constructed category is rigid and its commutativity isomorphisms…

Quantum Algebra · Mathematics 2009-11-07 D. Gurevich , R. Leclercq , P. Saponov

It is shown the construction of a module structure [2] with universe over a set of a particular kind of mathematical proofs, the base ring of this module will be built on a maximal consistent extension of a set of propositions, this…

Logic · Mathematics 2013-07-25 Kevin Davila Castellar , Ismael Gutierrez Garcia

We describe families of complete orthogonal bases of full rank matrices which span the vector spaces of square matrices. The proposed bases generalise non-trivially the Pauli matrice while shedding light on their algebraic properties.…

Rings and Algebras · Mathematics 2012-05-17 Edinah K. Gnang

This paper propose new sufficient conditions for stability analysis for non autonomous systems.

Dynamical Systems · Mathematics 2025-07-08 Majid Akbarian

We develop a theory of separable ring extensions and separable functors for nonunital rings in the setting of firm modules. We prove nonunital analogues of classical results on functorial separability and semisimplicity, and apply these…

Rings and Algebras · Mathematics 2026-05-26 Patrik Lundström