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A vector variational principle is proved.

Optimization and Control · Mathematics 2009-07-08 Ewa M. Bednarczuk , Dariusz Zagrodny

We give an effective infinitesimal Torelli theorem for cyclic covers of G/P, where G is a simple algebraic group and P is a maximal parabolic subgroup.

Algebraic Geometry · Mathematics 2013-01-24 Herbert Kanarek , Pedro L. Del Angel R

We prove a general form of Green Formula and Cauchy Integral Theorem for arbitrary closed rectifiable curves in the plane.

Classical Analysis and ODEs · Mathematics 2013-07-01 Julia Cufi , Joan Verdera

Inspired by the inductive proof of LYM-inequality given by P. Frankl, we provide an inductive proof of the Bollob\'{a}s two family theorem.

Combinatorics · Mathematics 2022-11-01 Sayan Goswami

We prove the theorem converse to Jackson's theorem for a modulus of smoothness of the first order generalised by means of an asymmetric operator of generalised translation.

Functional Analysis · Mathematics 2012-09-10 Muharrem Q. Berisha , Faton M. Berisha

A combinatorial proof of the unimodality of the generalized q-Gaussian coefficients based on the explicit formula for Kostka-Foulkes polynomials is given.

High Energy Physics - Theory · Physics 2016-09-06 Anatol N. Kirillov

Various characterizations are offered of injectivity of the canonical fundamental group homomorphism for a certain class of inverse limit spaces. One application characterizes the existence of a kind of generalized universal cover.

Algebraic Topology · Mathematics 2007-05-23 Paul Fabel

Combining P\'{o}sa's rotation lemma with a technique of Kopylov in a novel approach, we prove a generalization of the Erd\H{o}s-Gallai theorems on cycles and paths. This implies a clique version of the Erd\H{o}s-Gallai stability theorems…

Combinatorics · Mathematics 2020-11-03 Jie Ma , Long-Tu Yuan

Suppose that $(\mathcal{F},\mathcal{M})$ is an injective structure of $R$-Mod such that the class $\mathcal{F}$ is closed for direct limits, then two modules in $\mathcal{M}$ are isomorphic if there are maps in $\mathcal{F}$ from each one…

Rings and Algebras · Mathematics 2024-07-30 Mohanad Farhan Hamid

We prove a structure theorem for the Gromov-Witten invariants of compact Kahler surfaces with geometric genus $p_g>0$. Under the technical assumption that there is a canonical divisor that is a disjoint union of smooth components, the…

Symplectic Geometry · Mathematics 2007-05-23 Junho Lee , Thomas H. Parker

We present a general theorem which computes the cohomology of a homological vector field on global sections of vector bundles over smooth affine supervarieties. The hypotheses and results have the clear flavor of a localization theorem.

Representation Theory · Mathematics 2025-04-28 Vera Serganova , Alexander Sherman

Using a mixed-characteristic incarnation of fusion, we prove an analog of Nekov\'a\v{r}-Scholl's plectic conjecture for local Shimura varieties. We apply this to obtain results on the plectic conjecture for (global) Shimura varieties after…

Number Theory · Mathematics 2025-08-01 Siyan Daniel Li-Huerta

We prove a companion forms theorem for mod l Hilbert modular forms. This work generalises results of Gross and Coleman--Voloch for modular forms over Q, and gives a new proof of their results in many cases. The methods used are completely…

Number Theory · Mathematics 2010-09-07 Toby Gee

The theorem of Mather on generic projections of smooth algebraic varieties is also proved for the singular ones.

Algebraic Geometry · Mathematics 2007-05-23 A. Alzati , E. Ballico , G. Ottaviani

We prove the finiteness of the kernel of the localization map in the Galois cohomology of a connected reductive group over a global field

Number Theory · Mathematics 2023-09-22 Dylon Chow

We propose two inductive approaches for determining the cohomology of Deligne-Lusztig varieties in the case of the general linear group

Representation Theory · Mathematics 2014-11-14 Sascha Orlik

The K-theory of a functor may be viewed as a relative version of the K-theory of a ring. In the case of a Galois extension of a number field F/L with rings of integers A/B respectively, this K-theory of the "norm functor" is an extension of…

K-Theory and Homology · Mathematics 2009-09-29 Max Karoubi , Thierry Lambre

We prove a generalization of Fulton's conjecture which relates intersection theory on an arbitrary flag variety to invariant theory.

Algebraic Geometry · Mathematics 2010-04-27 Prakash Belkale , Shrawan Kumar , Nicolas Ressayre

We construct an Euler system -- a compatible family of global cohomology classes -- for the Galois representations appearing in the geometry of Hilbert modular surfaces. If a conjecture of Bloch and Kato on injectivity of regulator maps…

Number Theory · Mathematics 2018-12-11 Antonio Lei , David Loeffler , Sarah Livia Zerbes

Kolmogorov's invariant torus theorem is proved using a simple fixed point theorem.

Dynamical Systems · Mathematics 2015-05-27 Jacques Féjoz