Results 41 to 50 of about 181 (150)
Spreading Speed for a Vector‐Borne Disease System on Non‐Coincident Straight Infinite Cylinders
Studies in Applied Mathematics, Volume 156, Issue 6, June 2026.ABSTRACT Vector‐borne diseases remain an increasing global public health concern. In this work, we investigate the spreading speed of vector‐borne disease via a four‐component reaction–diffusion system posed on non‐coincident straight infinite cylinders, which stands for an unconventional spatial configuration.
Arnaud Ducrot +2 more
wiley +1 more source
Oppenheim–Schur inequalities for causal products
Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.Abstract We establish a class of Oppenheim–Schur‐type inequalities for the convolutional Jury product of positive semidefinite matrices. These results extend the classical Schur and Oppenheim inequalities associated with the Hadamard product to a causal convolutional setting.
Dominique Guillot +2 more
wiley +1 more source
Maximum number of zeroes of polynomials on weighted projective spaces over a finite field
Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.Abstract We compute the maximum number of rational points at which a homogeneous polynomial can vanish on a weighted projective space over a finite field, provided that the first weight is equal to 1. This solves a conjecture by Aubry, Castryck, Ghorpade, Lachaud, O'Sullivan and Ram, which stated that a Serre‐like bound holds with equality for weighted
Jade Nardi, Rodrigo San‐José
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Isotopy and equivalence of knots in 3‐manifolds
Journal of the London Mathematical Society, Volume 113, Issue 6, June 2026.Abstract Two knots K$K$ and J$J$ in S3$S^3$ are isotopic if and only if they are related by an orientation‐preserving diffeomorphism of S3$S^3$. This claim follows from the fact that any orientation‐preserving self‐diffeomorphism of S3$S^3$ is isotopic to the identity. We show that this same idea applies to any prime oriented closed 3‐manifold.
Paolo Aceto +4 more
wiley +1 more source
A priori bounds for the generalised parabolic Anderson model
Communications on Pure and Applied Mathematics, Volume 79, Issue 5, Page 1315-1394, May 2026.Abstract We show a priori bounds for solutions to (∂t−Δ)u=σ(u)ξ$(\partial _t - \Delta) u = \sigma (u) \xi$ in finite volume in the framework of Hairer's Regularity Structures [Invent Math 198:269–504, 2014]. We assume σ∈Cb2(R)$\sigma \in C_b^2 (\mathbb {R})$ and that ξ$\xi$ is of negative Hölder regularity of order −1−κ$- 1 - \kappa$ where κ<κ¯$\kappa <
Ajay Chandra +2 more
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Undecidable problems for completely 0-simple semigroups
Journal of Pure and Applied Algebra, 2009 The authors of the ground-breaking paper [\textit{T. E. Hall, S. I. Kublanovsky, S. Margolis, M. V. Sapir} and \textit{P. G. Trotter}, J. Pure Appl. Algebra 119, No. 1, 75-96 (1997; Zbl 0880.20040)] on completely 0-simple semigroups established a series of remarkable results indicating that these semigroups are much more complex than their name ...
Jackson, Marcel., Volkov, Mikhail.
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Derivations and KMS-Symmetric Quantum Markov Semigroups. [PDF]
Commun Math Phys, 2023 Vernooij M, Wirth M.
europepmc +1 more source
VARIETIES GENERATED BY COMPLETELY 0-SIMPLE SEMIGROUPS [PDF]
Journal of the Australian Mathematical Society, 2008 Abstract Kublanovsky has shown that if a subvariety V of the variety RS n generated by completely 0-simple semigroups over groups of exponent n is itself generated by completely 0-simple semigroups, then it must satisfy one of three conditions: (i) A2 ∈ V ; (ii) $N_1 \not \in {\mathbf {V}}
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Curvature-Dimension Conditions for Symmetric Quantum Markov Semigroups. [PDF]
Ann Henri Poincare, 2023 Wirth M, Zhang H.
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Completely simple semigroups of matrices
Semigroup Forum, 1986 In this paper we study the structure of a completely simple semigroup of \(d\times d\) real (and also nonnegative) matrices. Our aim in the nonnegative case is to describe the form of every matrix in the semigroup with respect to the well-known block structure of a fixed idempotent matrix.
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