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We continue the study of permutations of a finite regular semigroup that map each element to one of its inverses, providing a complete description in the case of semigroups whose idempotent generated subsemigroup is a union of groups. We…

群论 · 数学 2019-02-11 Peter M. Higgins

We discuss conditions for complete intersections in a toric variety which allow to compute Hodge numbers if the complete intersection is a quasi-smooth complete variety. A preliminary step is the computation of the Euler characteristic of…

代数几何 · 数学 2011-06-10 Helmut A. Hamm

Any smooth projective variety contains many complete intersection subvarieties with ample cotangent bundles, of each dimension up to half its own dimension.

代数几何 · 数学 2017-12-11 Damian Brotbek , Lionel Darondeau

We give homotopy invariant definitions corresponding to three well known properties of complete intersections, for the ring, the module theory and the endomorphisms of the residue field, and we investigate them for the mod p cochains on a…

代数拓扑 · 数学 2014-10-01 D. J. Benson , J. P. C. Greenlees , S. Shamir

In [5], without giving a detailed proof, Yamauchi provided a formula to calculate the genus of a certain family of smooth complete intersection algebraic curves. That formula is used extensively in [1] to study the algebraic curves for…

代数几何 · 数学 2019-10-08 Sajad Salami

We extend Fukushima's result on the finite convergence of an algorithm for the global convex feasibility problem to the local nonconvex case.

最优化与控制 · 数学 2014-08-01 C. H. Jeffrey Pang

The "Modularity Conjecture" is the assertion that the join of two nonmodular varieties is nonmodular. We establish the veracity of this conjecture for the case of linear idempotent varieties. We also establish analogous results concerning…

环与代数 · 数学 2012-12-24 Wolfram Bentz , Luis Sequeira

We present a construction of noncommutative double mirrors to complete intersections in toric varieties. This construction unifies existing sporadic examples and explains the underlying combinatorial and physical reasons for their…

代数几何 · 数学 2016-02-22 Lev Borisov , Zhan Li

In this paper we introduce an enhanced notion of extremal systems for sets in locally convex topological vector spaces and obtain efficient conditions for set extremality in the convex case. Then we apply this machinery to deriving new…

最优化与控制 · 数学 2016-10-03 Boris Mordukhovich , Nguyen Mau Nam

A local strict comparison theorem and some converse comparison theorems are proved for reflected backward stochastic differential equations under suitable conditions.

概率论 · 数学 2008-02-05 Juan Li , Shanjian Tang

This is an expository paper on the subject of the title. It assumes basic scheme theory, commutative and homological algebra.

alg-geom · 数学 2008-02-03 Angelo Vistoli

We formulate explicitly the necessary and sufficient conditions for the local invertibility of a field transformation involving derivative terms. Our approach is to apply the method of characteristics of differential equations, by treating…

高能物理 - 理论 · 物理学 2019-11-11 Eugeny Babichev , Keisuke Izumi , Norihiro Tanahashi , Masahide Yamaguchi

We improve the known Hodge type bound for the exotic cohomology of complete intersections. In the revised version, we included a simplification of our original argument due to Pierre Deligne. The note appears in the C. R. de l'Aca. des Sc.…

代数几何 · 数学 2007-05-23 Hélène Esnault , Daqing Wan

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…

最优化与控制 · 数学 2022-06-10 Adrian S. Lewis , Genaro López-Acedo , Adriana Nicolae

The idea of a finite collection of closed sets having "strongly regular intersection" at a given point is crucial in variational analysis. We show that this central theoretical tool also has striking algorithmic consequences. Specifically,…

最优化与控制 · 数学 2007-09-04 Adrian Lewis , Russell Luke , Jerome Malick

We extend the relative theory of admissible pairs and $p$-adic Hodge structures introduced in Part II to allow variation in the underlying local systems of $\mathbb{Q}_p$-vector spaces and isocrystals. This extension accommodates, in…

数论 · 数学 2026-03-25 Sean Howe , Christian Klevdal

To every local complete intersection ring one may associate a so-called generic hypersurface. In this paper we introduce rank varieties for modules and complexes over the generic hypersurface. The definition uses extension of scalars,…

交换代数 · 数学 2026-05-19 David A. Jorgensen

We prove a general likely intersections theorem, a counterpart to the Zilber-Pink conjectures, under the assumption that the Ax-Schanuel property and some mild additional conditions are known to hold for a given category of complex quotient…

代数几何 · 数学 2026-01-14 Sebastian Eterović , Thomas Scanlon

In this paper, I prove a very general extension theorem for log pluricanonical systems. The main application of this extension theorem is (together with Kawamata's subadjunction theorem) to give an optimal subadjunction theorem which…

代数几何 · 数学 2007-11-05 Hajime Tsuji

We derive a closed-form expression for the adjoint polynomials of torus knots and investigate their special properties. The results are presented in the very explicit double sum form and provide a deeper insight into the structure of…

高能物理 - 理论 · 物理学 2026-01-01 Andrei Mironov , Vivek Kumar Singh