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Our goal is to convince the readers that the theory of complex normal surface singularities can be a powerful tool in the study of numerical semigroups, and, in the same time, a very rich source of interesting affine and numerical…

Algebraic Geometry · Mathematics 2018-09-18 Tamás László , András Némethi

This work is concerned with a P\'olya-Szeg\"o type inequality for anisotropic functionals of Sobolev functions. The relevant inequality entails a double-symmetrization involving both trial functions and functionals. A new approach that…

Functional Analysis · Mathematics 2025-01-03 Gabriele Bianchi , Andrea Cianchi , Paolo Gronchi

This paper is devoted to establish a class of sharp Sobolev inequalities on the unit complex sphere as follows: 1) Case $0<d<Q=2n+2$: for any $f\in C^\infty$ and $2\leq q \leq \frac{2Q}{Q-d}$, \begin{equation*} \|f\|_q^2\leq…

Analysis of PDEs · Mathematics 2020-04-08 Yazhou Han , Shutao Zhang

We provide a precise statement and self contained proof of a Sobolev inequality (cf. [A, page 236 and page 237]) stated in the original paper. Higher order and fractional inequalities are treated as well.

Functional Analysis · Mathematics 2018-06-22 Mario Milman

In this paper we present a weighted $L_p$-theory of parabolic systems on a half space. The leading coefficients are assumed to be only measurable in $t$ and have small bounded mean oscillations (BMO) with respect to $x$, and the lower order…

Analysis of PDEs · Mathematics 2022-01-21 Doyoon Kim , Kyeong-Hun Kim , Kijung Lee

In this paper, we first investigate weighted Minkowski type inequalities for nearly spherical sets in space forms, focusing on the sets that are $C^1$-close to geodesic spheres. Our results generalize the work of \cite{G22} by incorporating…

Differential Geometry · Mathematics 2026-04-29 Weimin Sheng , Yinhang Wang

We study a class of degenerate parabolic and elliptic equations in divergence form in the upper half space $\{x_d>0\}$. The leading coefficients are of the form $x_d^2a_{ij}$, where $a_{ij}$ are bounded, uniformly elliptic, and measurable…

Analysis of PDEs · Mathematics 2025-06-05 Hongjie Dong , Junhee Ryu

We continue the~study of embeddings between different classes of Sobolev spaces of differential forms started in 2006 in a~paper by Gol$'$dshtein and Troyanov. As in this paper, our study is based on relations between $L_{q,p}$-cohomology…

Differential Geometry · Mathematics 2025-12-02 Vladimir Gol'dshtein , Yaroslav Kopylov , Roman Panenko

We propose several common extensions of the classes of Anosov subgroups and geometrically finite Kleinian groups among discrete subgroups of semisimple Lie groups. We relativize various dynamical and coarse geometric characterizations of…

Group Theory · Mathematics 2023-01-12 Michael Kapovich , Bernhard Leeb

We discuss sharp Sobolev inequalities for vector valued maps.

Analysis of PDEs · Mathematics 2007-05-23 Emmanuel Hebey

In this work we study riemannian metrics on flag manifolds adapted to the symmetries of these homogeneous nonsymmetric spaces. We first introduce the notion of riemannian $\Gamma $-symmetric space when $\Gamma $ is a general abelian finite…

Differential Geometry · Mathematics 2007-05-23 Abelkader Bouyakoub , Michel Goze , Elisabeth Remm

This paper introduces first order Sobolev spaces on certain rectifiable varifolds. These complete locally convex spaces are contained in the generally nonlinear class of generalised weakly differentiable functions and share key functional…

Classical Analysis and ODEs · Mathematics 2017-05-25 Ulrich Menne

In this paper we find new topological restrictions on Lagrangian submanifolds of cotangent bundles of spheres and of Lens spaces.

Symplectic Geometry · Mathematics 2009-12-04 Lev Buhovsky

In this expository paper, we discuss some of the main geometric inequalities for minimal hypersurfaces. These include the classical monotonicity formula, the Alexander-Osserman conjecture, the isoperimetric inequality for minimal surfaces,…

Differential Geometry · Mathematics 2023-03-14 S. Brendle

In this paper we show a number of logarithmic inequalities on several classes of Lie groups: log-Sobolev inequalities on general Lie groups, log-Sobolev (weighted and unweighted), log-Gagliardo-Nirenberg and log-Caffarelli-Kohn-Nirenberg…

Analysis of PDEs · Mathematics 2024-04-02 Marianna Chatzakou , Aidyn Kassymov , Michael Ruzhansky

A detailed study of uniformly regular Riemannian manifolds and manifolds with singular ends is carried out in this paper. Such classes of manifolds are of fundamental importance for a Sobolev space solution theory for parabolic evolution…

Analysis of PDEs · Mathematics 2015-06-24 Herbert Amann

We investigate geometric properties of homogeneous parabolic geometries with generalized symmetries. We show that they can be reduced to a simpler geometric structures and interpret them explicitly. For specific types of parabolic…

Differential Geometry · Mathematics 2016-08-10 Jan Gregorovič , Lenka Zalabová

We investigate the $CR$ geometry of the orbits $M$ of a real form $G_0$ of a complex simple group $G$ in a complex flag manifold $X=G/Q$. We are mainly concerned with finite type, Levi non-degeneracy conditions, canonical $G_0$-equivariant…

Complex Variables · Mathematics 2010-12-20 Andrea Altomani , Costantino Medori , Mauro Nacinovich

In the present paper we survey the most recent classification results for proper biharmonic submanifolds in unit Euclidean spheres. We also obtain some new results concerning geometric properties of proper biharmonic constant mean curvature…

Differential Geometry · Mathematics 2009-08-24 A. Balmuş , S. Montaldo , C. Oniciuc

We study asymptotic estimates of the dimension of cohomology on possibly non-compact complex manifolds for line bundles endowed with Hermitian metrics with algebraic singularities. We give a unified approach to establishing singular…

Complex Variables · Mathematics 2023-11-28 Dan Coman , George Marinescu , Huan Wang