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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

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

In this paper we present new results about the topology of the Milnor fibrations of analytic function-germs with a special attention to the topology of the fibers. In particular, we provide a short review on the existence of the Milnor…

Algebraic Geometry · Mathematics 2022-12-08 Taciana O. Souza , Cesar A. Ipanaque Zapata

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

Theorems on the existence of vector fields with given sets of Indexes of isolated Singular points are proved for the cases of closed manifolds, pairs of manifolds, manifolds with boundary, and gradient fields. It is proved that, on a…

Dynamical Systems · Mathematics 2007-05-23 A. O. Prishlyak

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 define local fibration structures for real map germs with strictly positive dimensional discriminant: a local fibration structure over the complement of the discriminant, and a complete local fibration structure which includes the…

Algebraic Geometry · Mathematics 2020-01-06 Maico F. Ribeiro , Raimundo N. Araújo dos Santos , Mihai Tibăr

In this paper, we discuss the concept of $\rho$-regularity of analytic map germs and its close relationship with the existence of locally trivial smooth fibrations, known as the Milnor fibrations. The presence of a Thom regular…

Differential Geometry · Mathematics 2024-05-07 Maico Ribeiro , Ivan Santamaria , Thiago da Silva

We give a criterion to test geometric properties such as Whitney equisingularity and Thom's $a_f$ condition for new families of (possibly non-isolated) hypersurface singularities that "behave well" with respect to their Newton diagrams. As…

Algebraic Geometry · Mathematics 2020-05-05 Christophe Eyral , Mutsuo Oka

We study the vanishing cycles on the Milnor fibre of a holomorphic map germ with special kind of non-isolated singularities which appear in symplectic geometry. We show, under assumptions given in the text, that the Lefschetz vanishing…

Algebraic Geometry · Mathematics 2007-05-23 Mauricio Garay

In this paper, we introduce a new regularity condition that characterizes the tameness of a composite singularity $H=G\circ F$ in a sharp way. Our approach provides a natural tool that links the topology of the Milnor tube fibrations…

Algebraic Geometry · Mathematics 2023-07-11 R. N. Araújo dos Santos , D. Dreibelbis , M. F. Ribeiro , I. D. Santamaría Guarín

We describe a new algebro-geometric perspective on the study of the Milnor fibration and, as a first step toward putting it into practice, prove powerful criteria for a deformation of a holomorphic function germ to admit a stratification on…

Algebraic Geometry · Mathematics 2025-03-04 Alex Hof

For any plane curve singularity defined by an analytic function germ $f$, we construct a spine on each Milnor fiber simultaneously, that realizes the vanishing topology. In order to do so, we study the separatrices at the origin of the…

Algebraic Geometry · Mathematics 2025-12-05 Pablo Portilla Cuadrado , Baldur Sigurðsson

In this article we investigate mixed polynomials and present conditions that can be applied on a specific class of polynomials in order to prove the existence of the Milnor Fibration, Milnor-L\^e Fibration and the equivalence between them.…

Algebraic Geometry · Mathematics 2020-03-03 N. G. Grulha , R. S. Martins

We consider manifolds with isolated singularities, i.e., topological spaces which are manifolds (say, $C^\infty$--) outside discrete subsets (sets of singular points). For (germs of) manifolds with, so called, cone--like singularities, a…

alg-geom · Mathematics 2007-05-23 Wolfgang Ebeling , Sabir M. Gusein-Zade

In this paper we give sufficient conditions to ensure uniqueness of limit cycles for a class of planar vector fields. We also exhibit a class of examples with exactly one limit cycle.

Classical Analysis and ODEs · Mathematics 2007-05-23 Timoteo Carletti

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

Interacting massive spin-1 fields have been widely used in cosmology and particle physics. We obtain a new condition on the validity of the classical limit of these theories related to the non-trivial constraints that exist for vector field…

High Energy Physics - Theory · Physics 2022-10-19 Zong-Gang Mou , Hong-Yi Zhang

We give unique analytic "normal forms" for germs of a holomorphic vector field of the complex plane in the neighborhood of an isolated singularity of saddle-node type having a convergent formal separatrix. We specifically address the…

Dynamical Systems · Mathematics 2013-07-29 Reinhard Schäfke , Loïc Jean Dit Teyssier
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