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We give a criterion for the existence of a non-degenerate quasihomogeneous polynomial in a configuration, i.e. in the space of polynomials with a fixed set of weights, and clarify the relation of this criterion to the necessary condition…

High Energy Physics - Theory · Physics 2015-06-26 Maximilian Kreuzer , Harald Skarke

We prove that if a complete connected $n$-dimensional Riemannian manifold $M$ has radial sectional curvature at a base point $p\in M$ bounded from below by the radial curvature function of a two-sphere of revolution $\widetilde M$ belonging…

Differential Geometry · Mathematics 2016-07-19 Nathaphon Boonnam

We give a strong version of a classic inequality of \L ojasiewicz; one which collapses to the usual inequality in the complex analytic case. We show that this inequality for a pair, quadruple, or octuple of real analytic functions allows us…

Algebraic Geometry · Mathematics 2008-11-29 David B. Massey

We study the boundary of the Milnor fibre of real analytic singularities $f: (\bR^m,0) \to (\bR^k,0)$, $m\geq k$, with an isolated critical value and the Thom $a_f$-property. We define the vanishing zone for $f$ and we give necessary and…

Complex Variables · Mathematics 2012-09-06 Aurélio Menegon Neto , José Seade

We study the bifurcation values of real polynomial maps $f: \bR^{2n} \to \bR^2$ which reflect the lack of asymptotic regularity at infinity. We formulate real counterparts of some structure results which have been previously proved in case…

Complex Variables · Mathematics 2019-01-04 Ying Chen , Mihai Tibar

We prove two general factorization theorems for fixed-point invariants of fibrations: one for the Lefschetz number and one for the Reidemeister trace. These theorems imply the familiar multiplicativity results for the Lefschetz and Nielsen…

Algebraic Topology · Mathematics 2014-10-01 Kate Ponto , Michael Shulman

We introduce and investigate a novel notion of transversely affine foliation, comparing and contrasting it to the previous ones in the literature. We then use it to give an extension of the classic Hadamard's theorem from Riemannian…

Differential Geometry · Mathematics 2025-03-11 Francisco C. Caramello , Henrique A. Puel Martins , Ivan P. Costa e Silva

We discuss and prove a number of cohomological results for Milnor fibers, real links, and complex links of local complete intersections with singularities of arbitrary dimension.

Algebraic Geometry · Mathematics 2014-02-24 David B. Massey

We study the topology of a line singularity, which is a complex hypersurface with non-isolated singularity given by a complex line. We describe the degeneration of its Milnor fibre to the singular hypersurface by means of a pair of…

Complex Variables · Mathematics 2014-12-01 Aurélio Menegon Neto

In this article we extend Milnor's fibration theorem for complex singularities to the case of singularities $f \bar g:(X,P) \to (C,0))$ defined on a complex analytic singularity germ $(X,P)$, with $f, g$ holomorphic and $f \bar g$ having an…

Algebraic Geometry · Mathematics 2007-05-23 Anne Pichon , José Seade

Let $f(\bf z,\bar{\bf z})$ be a mixed polynomial with strongly non-degenerate face functions. We consider a canonical toric modification $\pi:\,X\to \Bbb C^n$ and a polar modification $\pi_{\Bbb R}:Y\to X$. We will show that the toric…

Algebraic Geometry · Mathematics 2012-02-13 Mutsuo Oka

Let $E/F$ be an elliptic curve over a number field $F$ with complex multiplication by the ring of integers in an imaginary quadratic field $K$. We give a complete proof of the conjecture of Birch and Swinnerton-Dyer for $E/F$, as well as…

Number Theory · Mathematics 2023-09-06 Ashay Burungale , Matthias Flach

We show that if a braid $B$ can be parametrised in a certain way, then previous work can be extended to a construction of a polynomial $f:\mathbb{R}^4\to\mathbb{R}^2$ with the closure of $B$ as the link of an isolated singularity of $f$,…

Geometric Topology · Mathematics 2017-05-26 Benjamin Bode

We prove a conjecture of Michel--Venkatesh on joinings of distinct Linnik problems, in the setting of simultaneous quaternionic embeddings of imaginary quadratic fields having sufficiently many small split primes. This splitting condition…

Number Theory · Mathematics 2026-03-09 Valentin Blomer , Farrell Brumley , Maksym Radiwiłł

Using various results from extremal set theory (interpreted in the language of additive combinatorics), we prove an asyptotically sharp version of Freiman's theorem in F_2^n: if A in F_2^n is a set for which |A + A| <= K|A| then A is…

Combinatorics · Mathematics 2007-05-23 Ben Green , Terence Tao

It was proved by H. Whitney in 1933 that a Serre fibration of compact metric spaces admits a global section provided every fiber is homeomorphic to the unit interval [0,1]. Results of this paper extend Whitney theorem to the case when all…

Geometric Topology · Mathematics 2009-02-20 N. Brodsky , A. Chigogidze , E. V. Shchepin

The paper is devoted to the problem when a map from some closed connected manifold to an aspherical closed manifold approximately fibers, i.e., is homotopic to Manifold Approximate Fibration. We define obstructions in algebraic K-theory.…

Algebraic Topology · Mathematics 2018-07-06 Tom Farrell , Wolfgang Lueck , Wolfgang Steimle

We associate with an infinite cyclic cover of a punctured neighborhood of a simple normal crossing divisor on a complex quasi-projective manifold (assuming certain finiteness conditions are satisfied) an element in the Grothendieck ring…

Algebraic Topology · Mathematics 2016-05-24 Manuel Gonzalez Villa , Anatoly Libgober , Laurentiu Maxim

Using a recent result by S. Papadima and A. Suciu, we show that the equivariant Poincar\'e-Deligne polynomial of the Milnor fiber of a projective line arrangement having only double and triple points is combinatorially determined.

Algebraic Geometry · Mathematics 2017-08-30 Alexandru Dimca

We prove a complex polynomial plank covering theorem for not necessarily homogeneous polynomials. As the consequence of this result, we extend the complex plank theorem of Ball to the case of planks that are not necessarily centrally…

Metric Geometry · Mathematics 2024-05-28 Alexey Glazyrin , Roman Karasev , Alexandr Polyanskii