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We construct a scalar field based cosmological model, possessing a cosmological singularity characterized by a finite value of the cosmological radius and an infinite scalar curvature. Using the methods of the qualitative theory of…

General Relativity and Quantum Cosmology · Physics 2009-01-16 Francesco Cannata , Alexander Yu. Kamenshchik , Daniele Regoli

An adaptive proximal method for a special class of variational inequalities and related problems is proposed. For example, the so-called mixed variational inequalities and composite saddle problems are considered. Some estimates of the…

Optimization and Control · Mathematics 2020-08-25 Fedor S. Stonyakin

We explain how to derive largeness constraints in scalar curvature geometry using some basic splitting results and the potential theory on singular area minimizing hypersurfaces. This includes a variety of results like the non-existence of…

Differential Geometry · Mathematics 2019-01-01 Joachim Lohkamp

In [7], a notion of constant scalar curvature metrics on piecewise flat manifolds is defined. Such metrics are candidates for canonical metrics on discrete manifolds. In this paper, we define a class of vertex transitive metrics on certain…

Differential Geometry · Mathematics 2010-09-17 Daniel Champion , Andrew Marchese , Jacob Miller , Andrea Young

We discuss the use of inequalities to obtain the solution of certain variational problems on time scales.

Optimization and Control · Mathematics 2012-11-05 Martin J. Bohner , Rui A. C. Ferreira , Delfim F. M. Torres

We show the equivalence of several definitions of compact infra-solvmanifolds that appear in various math literatures.

Geometric Topology · Mathematics 2014-10-07 Shintaro Kuroki , Li Yu

For a given family of similar shapes, what we call a "unit shape" strongly analogizes the role of the unit circle within the family of all circles. Within many such families of similar shapes, we present what we believe is naturally and…

History and Overview · Mathematics 2019-02-20 Robert G. Donnelly , Alexander F. Thome

The note is devoted to estimates for convolutions appearing in some class of stochastic Volterra equations. Two maximal inequalities and exponential tail estimate are proved by the fractional method of infinite dimensional stochastic…

Probability · Mathematics 2007-05-23 Anna Karczewska

We give estimates on the intrinsic and the extrinsic curvature of manifolds that are isometrically immersed as cylindrically bounded submanifolds of warped products. We also address extensions of the results in the case of submanifolds of…

Differential Geometry · Mathematics 2010-09-20 L. J. Alias , G. P. Bessa , J. F. Montenegro , P. Piccione

In this paper, we study third order nonlinear partial differential equations which describe surfaces of constant curvature. From the flatness of connection 1-forms, we present a classification of equations with the type $u_t - u_{xxt} =…

Mathematical Physics · Physics 2025-08-29 Mingyue Guo , Jing Kang , Zhenhua Shi , Zhiwei Wu

We give a sup+inf inequality on $S_4$ for Paneitz operator.

Analysis of PDEs · Mathematics 2018-01-25 Samy Skander Bahoura

In this work a local inequality is provided which bounds the distance of an integral varifold from a multivalued plane (height) by its tilt and mean curvature. The bounds obtained for the exponents of the Lebesgue spaces involved are shown…

Differential Geometry · Mathematics 2012-01-05 Ulrich Menne

We obtain Schauder estimates for a general class of linear integro-differential equations. The estimates are applied to a scalar non-local Burgers equation and complete the global well-posedness results obtained in \cite{ISV}.

Analysis of PDEs · Mathematics 2016-04-26 Cyril Imbert , Tianling Jin , Roman Shvydkoy

We construct new examples of constant scalar curvature K\"{a}hler metrics on suitable resolutions of certain constant scalar curvature K\"{a}hler orbifolds with type I singularities, in the sense of Apostolov--Rollin, along a suborbifold of…

Differential Geometry · Mathematics 2025-03-14 Mehrdad Najafpour

We establish derivative estimates of solution of elliptic system in narrow regions.

Analysis of PDEs · Mathematics 2013-11-07 Haigang Li , Yanyan Li , Ellen Shiting Bao , Biao Yin

We construct forward self-similar solutions (expanders) for the compressible Navier-Stokes equations. Some of these self-similar solutions are smooth, while others exhibit a singularity do to cavitation at the origin.

Analysis of PDEs · Mathematics 2019-03-26 Pierre Germain , Tsukasa Iwabuchi

We give a method of counting the number of curves with a given type of singularity in a suitably ample linear series on a smooth surface using punctual Hilbert schemes. The types of singulaties for which our methods suffice include the…

Algebraic Geometry · Mathematics 2007-05-23 Heather Russell

We give existence and nonuniqueness results for simple planar curves with prescribed geodesic curvature.

Differential Geometry · Mathematics 2010-04-27 Matthias Schneider

We give a sharp convexity estimate for L-functions which have a functional equation and an Euler product.

Number Theory · Mathematics 2015-05-13 D. R. Heath-Brown

Global monochromatic solutions of the scalar wave equation are obtained in flat wormholes of dimensions 2+1 and 3+1. The solutions are in the form of infinite series involving cylindirical and spherical wave functions and they are…

General Relativity and Quantum Cosmology · Physics 2009-11-11 Necmi Bugdayci