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We construct Kn\"orrer type equivalences outside of the hypersurface case, namely, between singularity categories of cyclic quotient surface singularities and certain finite dimensional local algebras. This generalises Kn\"orrer's…

Algebraic Geometry · Mathematics 2017-07-11 Martin Kalck , Joseph Karmazyn

This paper studies the concept of algorithmic equiresolution of a family of embedded varieties or ideals, which means a simultaneous resolution of such a family compatible with a given (suitable) algorithm of resolution in characteristic…

Algebraic Geometry · Mathematics 2010-05-06 Augusto Nobile

In this work, we consider a pair $(\textbf{X},0)$ and $(\textbf{Y},0)$ of hypersurfaces in $(\mathbb{C}^{n+1},0)$ parametrized by finitely determined, quasihomogeneous map germs $f$ and $g,$ respectively. Zariski asked whether the…

Algebraic Geometry · Mathematics 2025-11-11 Otoniel Nogueira da Silva , Manoel Messias da Silva Júnior

The existence of a singularity by definition implies a preferred scale--the affine parameter distance from/to the singularity of a causal geodesic that is used to define it. However, this variable scale is also captured by the expansion…

General Relativity and Quantum Cosmology · Physics 2016-11-15 Claes Uggla

K\"ahler's paper "\"Uber die Verzweigung einer algebraischen Funktion zweier Ver\"anderlichen in der Umgebung einer singul\"aren Stelle" offered a more perceptual view of the link of a complex plane curve singularity than that provided…

Algebraic Geometry · Mathematics 2017-06-15 Walter D Neumann

We obtain a unified picture for the conifold singularity resolution. We propose that gauged supergravity, through a novel prescription for the twisting, provides an appropriate framework to smooth out singularities in the context of gravity…

High Energy Physics - Theory · Physics 2010-04-05 J. D. Edelstein , A. Paredes , A. V. Ramallo

We give a $\delta$-constant criterion for equinormalizability of deformations of isolated (not necessarily reduced) curve singularities over smooth base spaces of dimension $\geq 1$. For one-parametric families of isolated curve…

Algebraic Geometry · Mathematics 2019-02-19 Công-Trình Lê

In this paper we give some criteria for a family of generically reduced plane curve singularities to be equinormalizable. The first criterion is based on the $\delta$-invariant of a (non-reduced) curve singularity which is introduced by…

Algebraic Geometry · Mathematics 2011-03-18 Công-Trình Lê

We give a simple algorithm showing that the reduction of the multiplicity of a characteristic p>0 hypersurface singularity along a valuation is possible if there is a finite linear projection which is defectless. The method begins with the…

Algebraic Geometry · Mathematics 2017-11-09 Steven Dale Cutkosky , Hussein Mourtada

In this paper the relationship between the classical description of the resolution of quotient singularities and the string picture is reviewed in the context of N=(2,2) superconformal field theories. A method for the analysis of quotients…

High Energy Physics - Theory · Physics 2008-02-03 P. Aspinwall

We study the topological triviality and the Whitney equisingularity of a family of isolated determinantal singularities. On one hand, we give a L\^e-Ramanujam type theorem for this kind of singularities by using the vanishing Euler…

Algebraic Geometry · Mathematics 2014-05-15 J. J. Nuño-Ballesteros , B. Oréfice-Okamoto , J. N. Tomazella

In this paper, we investigate semilinear elliptic equations with general exponential-type nonlinearities in two dimensions. For such nonlinearities, we establish two main results. The first is the construction of a singular solution.…

Analysis of PDEs · Mathematics 2025-11-13 Hiroaki Kikuchi , Kenta Kumagai

We introduce the notion of right pre-resolutions (quasi-resolutions) for noncommutative isolated singularities, which is a weaker version of quasi-resolutions introduced by Qin-Wang-Zhang. We prove that right quasi-resolutions for…

Rings and Algebras · Mathematics 2022-04-20 Ji-Wei He , Yu Ye

In this paper we propose the concept of formal desingularizations as a substitute for the resolution of algebraic varieties. Though a usual resolution of algebraic varieties provides more information on the structure of singularities there…

Algebraic Geometry · Mathematics 2008-01-16 T. Beck

We show that the Zariski canonical stratification of complex hypersurfaces is locally bi-Lipschitz trivial along the strata of codimension two. More precisely, we study Zariski equisingular families of surface, not necessarily isolated,…

Algebraic Geometry · Mathematics 2022-03-15 Adam Parusinski , Laurentiu Paunescu

This text presents several aspects of the theory of equisingularity of complex analytic spaces from the standpoint of Whitney conditions. The goal is to describe from the geometrical, topological, and algebraic viewpoints a canonical…

Algebraic Geometry · Mathematics 2017-12-14 Arturo Giles Flores , Bernard Teissier

We study geometric properties of certain obstructed equisingular families of projective hypersurfaces with emphasis on smoothness, reducibility, being reduced, and having expected dimension. In the case of minimal obstructness, we give a…

Algebraic Geometry · Mathematics 2009-04-19 Anna Gourevitch , Dmitry Gourevitch

We continue the development of the study of the equisingularity of isolated singularities, in the determinantal case. This version of the paper includes a substantial amount of new material (76% larger). The new material introduces the idea…

Complex Variables · Mathematics 2016-01-05 Terence Gaffney , Antoni Rangachev

We give an overview of the fundamental definitions and results concerning hypersurface singularities, defined by convergent power series over an arbitrary real valued field. This approach combines, on the one hand, the classical case of…

Algebraic Geometry · Mathematics 2026-02-18 Gert-Martin Greuel

In the study of equisingularity of isolated singularities we have the classical theorem of Briancon, Speder and Teissier which states that a family of isolated hypersurface singularities is Whitney equisingular if and only if the…

Algebraic Geometry · Mathematics 2008-07-02 Kevin Houston