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In this paper the three-dimensional divisorial contractions $f\colon Y\to (X\ni P)$ are classified provided that $\Exc f=E$ is an irreducible divisor, $f(E)=P$, the variety $Y$ has canonical singularities and $(X\ni P)$ is a toric terminal…

Algebraic Geometry · Mathematics 2014-11-24 S. A. Kudryavtsev

Any sequence of properly embedded minimal disks in an open subset U of Euclidean 3-space has a subsequence such that the curvatures blow up on a relatively closed subset K of U and such that the disks converge in the complement of K to a…

Differential Geometry · Mathematics 2016-02-22 Brian White

We study F-blowups of non-F-regular normal surface singularities. Especially the cases of rational double points and simple elliptic singularities are treated in detail.

Algebraic Geometry · Mathematics 2024-02-27 Nobuo Hara , Tadakazu Sawada , Takehiko Yasuda

We prove existence for many examples of shrinkers by producing compact, smoothly embedded surfaces that, under mean curvature flow, develop singularities at which the shrinkers occur as blowups.

Differential Geometry · Mathematics 2026-01-22 David Hoffman , Francisco Martin , Brian White

We generalize an intersection-theoretic local inequality of Fulton-Lazarsfeld to weighted blowups. As a consequence, we obtain the $4n^2/(k+1)$-inequality for isolated $cA_k$ singularities, an analogue of the $4 n^2$-inequality for smooth…

Algebraic Geometry · Mathematics 2025-09-01 Igor Krylov , Takuzo Okada , Erik Paemurru

We analyze the asymptotic behavior of a $2$-dimensional integral current which is almost minimizing in a suitable sense at a singular point. Our analysis is the second half of an argument which shows the discreteness of the singular set for…

Analysis of PDEs · Mathematics 2015-08-25 Camillo De Lellis , Emanuele Spadaro , Luca Spolaor

We study the behaviour of sequences of blowing-ups under ramifications, and use the results to give a simple proof of Camacho-Sad's Theorem on the existence of Separatrices for singularities of plane holomorphic foliations. The main result…

Dynamical Systems · Mathematics 2007-05-23 Pedro Fortuny Ayuso

We analyse a blow-up sequence of solutions for Liouville type equations involving Dirac measures with "collapsing" poles. We consider the case where blow-up occurs exactly at a point where the poles coalesce. After proving that a…

Analysis of PDEs · Mathematics 2022-07-01 Gabriella Tarantello

Let $C \subset \mathbb{P}^2$ be an irreducible and reduced curve of degree $e > 0$. Let $X$ be the blow up of $\mathbb{P}^2$ at $r$ distinct smooth points $p_1,\ldots,p_r \in C$. We study line bundles on $X$ and establish conditions for…

Algebraic Geometry · Mathematics 2017-01-09 Krishna Hanumanthu

We study boundary blow-up solutions of semilinear elliptic equations $Lu=u_+^p$ with $p>1$, or $Lu=e^{au}$ with $a>0$, where $L$ is a second order elliptic operator with measurable coefficients. Several uniqueness theorems and an existence…

Analysis of PDEs · Mathematics 2008-02-07 Hongjie Dong , Seick Kim , Mikhail Safonov

We consider a parabolic-type PDE with a diffusion given by a fractional Laplacian operator and with a quadratic nonlinearity of the 'gradient' of the solution, convoluted with a singular term b. Our first result is the well-posedness for…

Analysis of PDEs · Mathematics 2022-09-07 Diego Chamorro , Elena Issoglio

In this paper we study the blow-ups of the singular points in the boundary of a minimizing cluster lying in the interface of more than two chambers. We establish a sharp lower bound for the perimeter density at those points and we prove…

Analysis of PDEs · Mathematics 2018-01-30 Jonas Hirsch , Michele Marini

This paper is concerned with the existence of constant scalar curvature Kaehler metrics on blow ups at finitely many points of compact manifolds which already carry constant scalar curvature Kaehler metrics. We also consider the…

Differential Geometry · Mathematics 2007-05-23 Claudio Arezzo , Frank Pacard

It has been established that solutions to the inviscid Proudman-Johnson equation subject to a homogeneous three-point boundary condition can develop singularities in finite time. In this paper, we consider the possibility of singularity…

Analysis of PDEs · Mathematics 2025-06-26 Ikechukwu Obi-Okoye , Alejandro Sarria

In this paper we consider the so-called Toda System in planar domains under Dirichlet boundary condition. We show the existence of continua of solutions for which one component is blowing up at a certain number of points. The proofs use…

Analysis of PDEs · Mathematics 2014-08-01 Teresa D'Aprile , Angela Pistoia , David Ruiz

Obtaining the classification of 3d $\mathcal{N}=4$ quivers whose Coulomb branches have an isolated singularity is an essential step in understanding moduli spaces of vacua of supersymmetric field theories with 8 supercharges in any…

High Energy Physics - Theory · Physics 2024-12-30 Antoine Bourget , Quentin Lamouret , Sinan Moura Soysüren , Marcus Sperling

We consider the semilinear wave equation with power nonlinearity in one space dimension. We first show the existence of a blow-up solution with a characteristic point. Then, we consider an arbitrary blow-up solution $u(x,t)$, the graph…

Analysis of PDEs · Mathematics 2009-10-25 F. Merle , H. Zaag

We present a numerical study of solutions to the generalized Kadomtsev-Petviashvili equations with critical and supercritical nonlinearity for localized initial data with a single minimum and single maximum. In the cases with blow-up, we…

Analysis of PDEs · Mathematics 2013-10-22 C. Klein , R. Peter

In this sequel to Resolution except for minimal singularities I, we find the smallest class of singularities in four variables with which we necessarily end up if we resolve singularities except for normal crossings. The main new feature is…

Algebraic Geometry · Mathematics 2023-06-12 Edward Bierstone , Pierre Lairez , Pierre D. Milman

Little is known about the behaviour of the Oka property of a complex manifold with respect to blowing up a submanifold. A manifold is of Class $\mathscr A$ if it is the complement of an algebraic subvariety of codimension at least $2$ in an…

Algebraic Geometry · Mathematics 2016-12-07 Finnur Larusson , Tuyen Trung Truong