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We prove that it is relatively consistent with the usual axioms of mathematics that all automorphisms of the Calkin algebra are inner. Together with a 2006 Phillips--Weaver construction of an outer automorphism using the Continuum…

Operator Algebras · Mathematics 2010-05-25 Ilijas Farah

It is proved that a parameterized curve in a metric space $X$ is absolutely continuous if and only if its composition with any Lipschitz function on $X$ is absolutely continuous.

Metric Geometry · Mathematics 2025-09-16 V. I. Bakhtin

This goal of the paper is to show that the automorphisms of the complex of curves in a surface are induced by the self-homeomorphisms of the surface except the surface is the 2-holed torus.

Geometric Topology · Mathematics 2007-05-23 Feng Luo

It is well known that among all closed bounded curves in the plane with the given perimeter, the circle encloses the maximum area. There are many proofs in the literature. In this article we have given a new proof using some ideas of Demar.

History and Overview · Mathematics 2016-09-28 Absos Ali Shaikh , Chandan Kumar Mondal

This paper generalizes work of Buzzard and Kilford to the case $p=3$, giving an explicit bound for the overconvergence of the quotient $E_\kappa / V(E_\kappa)$ and using this bound to prove that the eigencurve is a union of countably many…

Number Theory · Mathematics 2013-10-29 David Roe

We study interior curvature estimates for convex graphs which satisfy the quotient equation $\frac{\sigma_{n}}{\sigma_{n-2}}(\lambda)=f(X)>0$ in this paper.

Differential Geometry · Mathematics 2025-05-07 Jianxiang Liu

We establish sharp lower and upper bounds for the number of integral points near dilations of a space curve with nowhere vanishing torsion.

Number Theory · Mathematics 2019-04-19 Jing-Jing Huang

It was shown by Kaup that every origin-preserving automorphism of quasi-circular domains is a polynomial mapping. In this paper, we study how the weight of quasi-circular domains and the degree of such automorphisms are related. By using…

Complex Variables · Mathematics 2014-03-18 Atsushi Yamamori

We prove that every self-homeomorphism on the inverse limit space of a quadratic map is isotopic to some power of the shift map.

Dynamical Systems · Mathematics 2017-07-10 Henk Bruin , Sonja Stimac

In this paper, we establish some comparison theorems for the total quotient curvature. Specifically, we examine the behavior of the functional with respect to the total quotient curvature and prove that the background Einstein metric…

Differential Geometry · Mathematics 2026-02-10 Jiaqi Chen , Yi Fang , Jingyang Zhong

Given a compact four dimensional smooth Riemannian manifold $(M,g)$ with smooth boundary, we consider the evolution equation by $Q$-curvature in the interior keeping the $T$-curvature and the mean curvature to be zero and the evolution…

Analysis of PDEs · Mathematics 2007-08-16 Cheikh Birahim Ndiaye

Given a conformal metric with finite total Q-curvature, we show that the assumptions on scalar curvature sensitively govern the Q-curvature integral. Additionally, we introduce a conformal mass for such manifolds. Using such mass, we…

Differential Geometry · Mathematics 2025-05-07 Mingxiang Li

Let p be a prime number and C be the p-adic tame level 1 eigencurve introduced by Coleman-Mazur. We prove that C is smooth at the evil Eisenstein points and we give necessary and sufficient conditions for etaleness of the map to the weight…

Number Theory · Mathematics 2007-05-23 Joel Bellaiche , Gaetan Chenevier

This paper considers curves in Grassmannians which are themselves immersed in projective space by the Plucker map. It is shown that for a generic vector bundle of high enough degree, the image curve lies in a proper linear subvariety of…

alg-geom · Mathematics 2008-02-03 Montserrat Teixidor-i-Bigas

A short proof of the Mazur-Ulam theorem concerning isometries of real normed spaces.

Metric Geometry · Mathematics 2013-06-12 Bogdan Nica

We prove that integral points can be effectively determined on all but finitely many modular curves, and on all but one modular curve of prime power level.

Number Theory · Mathematics 2014-02-26 Yuri Bilu , Marco Illengo

We show that for any metric space $X$ the condition \[ \int_X\int_X\int_X c(z_1,z_2,z_3)^2\, d\Hm z_1\, d\Hm z_2\, d\Hm z_3 < \infty, \] where $c(z_1,z_2,z_3)$ is the Menger curvature of the triple $(z_1,z_2,z_3)$, guarantees that $X$ is…

Metric Geometry · Mathematics 2012-12-05 Immo Hahlomaa

We prove stability estimates for the isoperimetric inequalities for the first and the second nonzero Laplace eigenvalues on surfaces, both globally and in a fixed conformal class. We employ the notion of eigenvalues of measures and show…

Differential Geometry · Mathematics 2021-06-30 Mikhail Karpukhin , Mickaël Nahon , Iosif Polterovich , Daniel Stern

The contour integrals, occurring in the arbitrary-order phase-integral quantization conditions given in a previous paper, are in the first- and third-order approximations expressed in terms of complete elliptic integrals in the case that…

Exactly Solvable and Integrable Systems · Physics 2015-06-26 N. Athavan , N. Fröman , M. Lakshmanan

We prove a compactness theorem for metrics with Bounded Integral Curvature on a fixed closed surface $\Sigma$. As a corollary, we obtain a compactification of the space of Riemannian metrics with conical singularities, where an accumulation…

Differential Geometry · Mathematics 2016-10-20 Clément Debin