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Related papers: Fibrations of highly singular map germs

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We discuss the most general condition under which a singular local tube fibration exists. We give an application to composition of map germs.

Algebraic Geometry · Mathematics 2023-07-04 Ying Chen , Mihai Tibăr

We study composed map germs with respect to their local fibrations. Under most general conditions, inspired by the tameness condition that was introduced recently, we prove the existence of singular tube fibrations, and we determine the…

Algebraic Geometry · Mathematics 2024-01-25 Ying Chen , Cezar Joiţa , Mihai Tibăr

For a map germ $G$ with target $(\mathbb C^{p}, 0)$ or $(\mathbb R^{p}, 0)$ with $p\ge 2$, we address two phenomena which do not occur when $p=1$: the image of $G$ may be not well-defined as a set germ, and a local fibration near the origin…

Complex Variables · Mathematics 2020-09-16 Cezar Joiţa , Mihai Tibăr

Latent fibrations are an adaptation, appropriate for categories of partial maps (as presented by restriction categories), of the usual notion of fibration. The paper initiates the development of the basic theory of latent fibrations and…

Category Theory · Mathematics 2020-10-30 Robin Cockett , Geoff Cruttwell , Jonathan Gallagher , Dorette Pronk

In this paper, we study properties of maps between fibrant objects in model categories. We give a characterization of weak equivalences between fibrant object. If every object of a model category is fibrant, then we give a simple…

Category Theory · Mathematics 2016-07-27 Valery Isaev

We consider fibrations of genus 2 over complex surfaces. The purpose of this paper is primarily to provide a geometric description of the possible structures of the fibration on a neighborhood of a singular fiber. In particular it is shown…

Algebraic Geometry · Mathematics 2012-05-07 Julio C. Rebelo , Bianca Santoro

We find natural and convenient conditions which allow us to produce classes of genuine real map germs with Milnor tube fibration, either with Thom regularity or without it.

Algebraic Geometry · Mathematics 2019-05-01 A. J. Parameswaran , M. Tibar

We introduce the sphere fibration for real map germs with radial discriminant and we address the problem of its equivalence with the Milnor-Hamm tube fibration. Under natural conditions, we prove the existence of open book structures with…

Algebraic Geometry · Mathematics 2020-09-16 Raimundo N. Araújo dos Santos , Maico F. Ribeiro , Mihai Tibar

We prove fibration theorems \`a la Milnor for differentiable real maps with non isolated critical values. We study the situation for maps with linear discriminant, and prove that the concept of d-regularity is the key point for the…

Algebraic Geometry · Mathematics 2020-02-18 JosÉ Luis Cisneros-Molina , AurÉlio Menegon , JosÉ Seade , Jawad Snoussi

We give a classification of superattracting germs in dimension one over a complete normed algebraically closed field of positive characteristic up to conjugacy. In particular we show that formal and analytic classifications coincide for…

Dynamical Systems · Mathematics 2014-08-13 Matteo Ruggiero

We introduce several sufficient conditions to guarantee the existence of the Milnor vector field for new classes of singularities of map germs. This special vector field is related with the equivalence problem of the Milnor fibrations for…

Geometric Topology · Mathematics 2018-11-01 Raimundo Araújo Dos Santos , Maico F. Ribeiro

In this paper we study the Milnor fibrations associated to real analytic map germs $\psi:(\mathbb{R}^{m},0) \to (\mathbb{R}^2,0)$ with isolated critical point at $0\in \mathbb{R}^{m}$. The main result relates the existence of called Strong…

Geometric Topology · Mathematics 2016-05-09 R. Araújo dos Santos

The image of a holomorphic map germ is not necessarily locally open, and it is not always well-defined as a set germ. We find the structure of what becomes the image of a map germ when the target is a surface. We encode it as a decorated…

Complex Variables · Mathematics 2024-07-11 Cezar Joiţa , Mihai Tibăr

Let p be a finite regular covering on a 2-sphere with at least three branch points. In this paper, we construct a local signature for the class of fibrations whose general fibers are isomorphic to the covering p.

Geometric Topology · Mathematics 2009-12-11 Masatoshi Sato

We prove extensions of Milnor's theorem for germs with nonisolated singularity and use them to find new classes of genuine real analytic mappings $\psi$ with positive dimensional singular locus $\Sing \psi \subset \psi^{-1}(0)$, for which…

Algebraic Geometry · Mathematics 2017-10-05 Mihai Tibar , Ying Chen , Raimundo N. Araújo dos Santos

We present a general criterion for the existence of open book structures defined by real map germs $(\bR^m, 0) \to (\bR^p, 0)$, where $m> p \ge 2$, with isolated critical point. We show that this is satisfied by weighted-homogeneous maps.…

Algebraic Geometry · Mathematics 2010-12-21 Raimundo Araújo dos Santos , Mihai Tibăr

We give analytic and algebraic conditions under which a deformation of real analytic functions with non-isolated singular locus is a deformation with fibre constancy.

Algebraic Geometry · Mathematics 2025-03-17 Cezar Joiţa , Matteo Stockinger , Mihai Tibăr

A holomorphic Lagrangian fibration is stable if the characteristic cycles of the singular fibers are of type $I_m, 1 \leq m <\infty,$ or $A_{\infty}$. We will give a complete description of the local structure of a stable Lagrangian…

Algebraic Geometry · Mathematics 2010-07-14 Jun-Muk Hwang , Keiji Oguiso

We develop a categorical framework for reasoning about abstract properties of differentiation, based on the theory of fibrations. Our work encompasses the first-order fragments of several existing categorical structures for differentiation,…

Category Theory · Mathematics 2024-09-10 Matteo Capucci , Geoffrey S. H. Cruttwell , Neil Ghani , Fabio Zanasi

In this paper we extend the characterization of trivial map-germs for the real Milnor fibrations started by Church and Lamotke. Our main result cover all cases on the three dimensional real Milnor fibers.

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