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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

In this paper, we study equivariant Hurewicz fibrations, obtain their internal characteristics, and prove theorems on relationship between equivariant fibrations and fibrations generated by them. Local and global properties of equivariant…

Algebraic Topology · Mathematics 2025-09-16 Pavel S. Gevorgyan

We prove Simon's conjecture for 3-manifolds.

Group Theory · Mathematics 2018-11-08 Rita Gitik

Recently Stephen Theriault and I found an elementary construction of Anick's spaces and proved their main properties(arXiv:0710.1024).In this work the fundamental fibration is decomposed. This is useful in studying maps out of Anick's…

Algebraic Topology · Mathematics 2008-04-07 Brayton Gray

We give a conceptual explanation for the somewhat mysterious origin of Suslin matrices. This enables us to generalize the construction of Suslin matrices and to give more conceptual proofs of some well-known results.

Commutative Algebra · Mathematics 2026-02-12 Tariq Syed

We prove a weak version of a conjecture of Matsushita saying that for a Lagrangian fibration on a hyper-Kaehler manifold $X$, the moduli map for the fibers is either generically of maximal rank or constant. Assuming the base is smooth and…

Algebraic Geometry · Mathematics 2022-02-15 Bert van Geemen , Claire Voisin

We give several structure theorems for certain surjective endomorphisms on Mori fibre spaces, based on the dynamical Iitaka fibration of the ramification divisor. As an application, we prove the Kawaguchi-Silverman conjecture for projective…

Algebraic Geometry · Mathematics 2025-06-23 Sheng Meng , Long Wang , Tianle Yang

The present report, has been inspired by the need of the author and its colleagues to understand the underlying theory of Wirtinger's Calculus and to further extend it to include the kernel case. The aim of the present manuscript is…

Machine Learning · Computer Science 2010-06-02 P. Bouboulis

In this survey, we remind some fibrations structure theorems (also called Milnor's fibrations) recently proved in the real and complex case, in the local and global settings. We give several Poincar\'e-Hopf type formulae which relates the…

Algebraic Geometry · Mathematics 2014-09-18 Nicolas Dutertre , Raimundo N. Araújo Dos Santos , Ying Chen , Antonio Andrade

Using iterated vanishing cycles and convolution, we prove a motivic version of a conjecture of Steenbrink concerning the spectrum of hypersurface singularities

Algebraic Geometry · Mathematics 2007-12-05 G. Guibert , F. Loeser , M. Merle

Around 1960, R. Palais and J. Cerf proved a fundamental result relating spaces of diffeomorphisms and imbeddings of manifolds: If V is a submanifold of M, then the map from Diff(M) to Imb(V,M) that takes f to its restriction to V is locally…

Geometric Topology · Mathematics 2007-05-23 John Kalliongis , Darryl McCullough

Either fibered knots supporting the tight contact structure are unique in their smooth concordance class or there exists a fibered counterexample to the Slice-Ribbon Conjecture.

Geometric Topology · Mathematics 2017-05-17 Kenneth L. Baker

We formulate several conjectures which shed light on the structure of Veronese syzygies of projective spaces. Our conjectures are based on experimental data that we derived by developing a numerical linear algebra and distributed…

Commutative Algebra · Mathematics 2017-11-10 Juliette Bruce , Daniel Erman , Steve Goldstein , Jay Yang

Let f:S ->B be a relatively minimal fibred surface. In this note we give a partial affirmative answer to a conjecture of Xiao, proving that the direct image of the relative dualizing sheaf of $f$ is ample when the slope of the fibration is…

Algebraic Geometry · Mathematics 2007-05-23 Miguel A. Barja , Francesco Zucconi

We prove that the Becker-Gottlieb transfer is functorial up to homotopy, for all fibrations with finitely dominated fibers. This resolves a lingering foundational question about the transfer, which was originally defined in the late 1970s…

Algebraic Topology · Mathematics 2023-06-07 John R. Klein , Cary Malkiewich

Let $f: X \to Y$ be a dominant morphism of smooth, proper and geometrically integral varieties over a number field $k$, with geometrically integral generic fibre. We give a necessary and sufficient geometric criterion for the induced map…

Algebraic Geometry · Mathematics 2018-09-28 Daniel Loughran , Alexei N. Skorobogatov , Arne Smeets

Transports along path in fibre bundles are axiomatically introduced. Their general functional form and some their simple properties are investigated. The relationships of the transports along paths and lifting of paths are studied.

Differential Geometry · Mathematics 2007-05-23 Bozhidar Z. Iliev

We prove an absolute Chow-Kuenneth decomposition for the motive of universal families A of abelian varieties over some compact Shimura surface. We furthermore prove the Hodge conjecture for general fibres of A, extending results of Ribet.

Algebraic Geometry · Mathematics 2008-02-22 Andrea Miller

We propose generalized Fermat's conjecture in the framework of arithmetic dynamics, and give evidences. The multi-indexed version is added.

Number Theory · Mathematics 2026-03-11 Atsushi Moriwaki

We survey the impact of Lieb's influential paper "Proofs of some conjectures on permanents" [J. Math. Mech. 16 1966, 127-134], which introduced the famous permanental dominance conjecture. This conjecture has defied all attacks for over…

Representation Theory · Mathematics 2023-06-01 Ian M. Wanless