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We consider holomorphic foliations by curves on compact complex manifolds, for which we investigate the existence of projective structures along the leaves varying holomorphically (foliated projective structures), that satisfy particular…

Complex Variables · Mathematics 2026-01-13 Bertrand Deroin , Adolfo Guillot

The monodromy conjecture is an umbrella term for several conjectured relationships between poles of zeta functions, monodromy eigenvalues and roots of Bernstein-Sato polynomials in arithmetic geometry and singularity theory. Even the…

Algebraic Geometry · Mathematics 2022-03-30 Alexander Esterov , Ann Lemahieu , Kiyoshi Takeuchi

In this paper we prove a desingularization theorem for Legendrian surfaces that are the conormal of a quasi-ordinary hypersurface.

Algebraic Geometry · Mathematics 2015-11-02 Antonio Araujo , Joao Cabral , Orlando Neto

Troels Jorgensen conjectured that the algebraic and geometric limits of an algebraically convergent sequence of isomorphic Kleinian groups agree if there are no new parabolics in the algebraic limit. We prove that this conjecture holds in…

Geometric Topology · Mathematics 2007-05-23 James W. Anderson , Richard D. Canary

We show that a surface group contained in a reductive real algebraic group can be deformed to become Zariski dense, unless its Zariski closure acts transitively on a Hermitian symmetric space of tube type. This is a kind of converse to a…

Differential Geometry · Mathematics 2015-01-14 Inkang Kim , Pierre Pansu

We give a new proof of a classical uniqueness theorem of Alexandrov using the weak uniqueness continuation theorem of Bers-Nirenberg. We prove a version of this theorem with the minimal regularity assumption: the spherical hessians of the…

Analysis of PDEs · Mathematics 2013-05-02 Pengfei Guan , Zhizhang Wang , Xiangwen Zhang

We prove the main Conjecture 4 of our paper arXiv:1403.6061v5, which leads to classification of degenerations of codimension one of Kahlerian K3 surfaces with finite symplectic automorphism groups.

Algebraic Geometry · Mathematics 2016-07-01 Viacheslav V. Nikulin

This paper proves the existence of nonmeasurable dense sets with additional properties using combinatorial techniques.

Classical Analysis and ODEs · Mathematics 2023-01-31 Arpan Sadhukhan

We prove the invariance of plurigenera under smooth projective deformations in full generality. The proof is done by several estimates of singular hermitian metrics in terms of $L^{2}$-extension theorem of holomorphic sections.

Algebraic Geometry · Mathematics 2007-05-23 Hajime Tsuji

We prove Patterson's conjecture about the singularities of the Selberg zeta function associated to a convex-cocompact, torsion free group acting on a hyperbolic space.

dg-ga · Mathematics 2008-02-03 Ulrich Bunke , Martin Olbrich

We show that a Kleinian surface group, or hyperbolic 3-manifold with a cusp-preserving homotopy-equivalence to a surface, has bounded geometry if and only if there is an upper bound on an associated collection of coefficients that depend…

Geometric Topology · Mathematics 2009-11-07 Yair N. Minsky

The present paper is concerned with the various algebraic structures supported by the set of Tur\'an densities. We prove that the set of Tur\'an densities of finite families of r-graphs is a non-trivial commutative semigroup, and as a…

Combinatorics · Mathematics 2016-07-04 Codrut Grosu

We study the structure of $r$-uniform hypergraphs containing no Berge cycles of length at least $k$ for $k \leq r$, and determine that such hypergraphs have some special substructure. In particular we determine the extremal number of such…

Combinatorics · Mathematics 2019-07-12 Ervin Győri , Nathan Lemons , Nika Salia , Oscar Zamora

We consider singular foliations whose holonomy groupoid may be nicely decomposed using Lie groupoids (of unequal dimension). We show that the Baum-Connes conjecture can be formulated in this setting. This conjecture is shown to hold under…

K-Theory and Homology · Mathematics 2020-01-15 Iakovos Androulidakis , Georges Skandalis

The paper contains a general construction which produces new examples of non simply-connected smooth projective surfaces. We analyze the resulting surfaces and their fundamental groups. Many of these fundamental groups are expected to be…

alg-geom · Mathematics 2008-02-03 Fedor Bogomolov , Ludmil Katzarkov

In this paper we study the problem of analytic extension of germs of holonomy of algebraic foliations. More precisely we prove that for a Riccati foliation associated to a branched projective structure over a finite type surface which is…

Dynamical Systems · Mathematics 2015-06-16 Sébastien Alvarez , Nicolas Hussenot

Given a complex affine hypersurface with isolated singularity determined by a homogeneous polynomial, we identify the noncommutative Hodge structure on the periodic cyclic homology of its singularity category with the classical Hodge…

Algebraic Geometry · Mathematics 2025-08-19 Michael K. Brown , Mark E. Walker

The holomorphy conjecture states roughly that Igusa's zeta function associated to a hypersurface and a character is holomorphic on $\mathbb{C}$ whenever the order of the character does not divide the order of any eigenvalue of the local…

Number Theory · Mathematics 2015-08-04 Wouter Castryck , Denis Ibadula , Ann Lemahieu

We prove Sarnak's spherical density conjecture for the principal congruence subgroup of SL(n, Z) of arbitrary level. Applications include a complete version of Sarnak's optimal lifting conjecture for principal congruence subgroups of SL(n,…

Number Theory · Mathematics 2024-04-09 Edgar Assing , Valentin Blomer , Paul D. Nelson

For almost all Riemannian metrics (in the $C^\infty$ Baire sense) on a closed manifold $M^{n+1}$, $3\leq (n+1)\leq 7$, we prove that the union of all closed, smooth, embedded minimal hypersurfaces is dense. This implies there are infinitely…

Differential Geometry · Mathematics 2018-02-12 Kei Irie , Fernando C. Marques , André Neves