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We prove a conjecture of Shafarevich about universal coverings of projective manifolds provided the fundamental group is residually finite.

Algebraic Geometry · Mathematics 2014-01-21 Robert Treger

The classical Shafarevich conjecture predicts that the universal cover of a complex smooth projective variety $X$ is holomorphically convex. In this paper, we propose a refinement of this conjecture for varieties defined over the reals. In…

Algebraic Geometry · Mathematics 2026-03-19 Rodolfo Aguilar , Cristhian Garay

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

This article is devoted to examples of (orbifold) K\"ahler groups from the perspective of the so-called Shafarevich conjecture on holomorphic convexity. It aims at pointing out that every quasi-projective complex manifold with an…

Algebraic Geometry · Mathematics 2016-11-29 Philippe Eyssidieux

We prove that the universal cover of a normal complex algebraic variety admitting a faithful complex representation of its fundamental group is an analytic Zariski open subset of a holomorphically convex complex space. This is a non-proper…

Algebraic Geometry · Mathematics 2024-08-30 Benjamin Bakker , Yohan Brunebarbe , Jacob Tsimerman

In this paper we prove that the universal cover of a smooth projective variety with nilpotent fundamental group is holomorphically convex.

alg-geom · Mathematics 2008-02-03 Ludmil Katzarkov

We extend to compact K\"ahler manifolds some classical results on linear representation of fundamental groups of complex projective manifolds. Our approach based on an interversion lemma for fibrations with tori versus general type…

Algebraic Geometry · Mathematics 2019-02-20 Frédéric Campana , Benoît Claudon , Philippe Eyssidieux

This article generalises to K\"ahler orbifolds general results on uniformisation of compact K\"ahler manifolds such as the Shafarevich conjecture for linear fundamental groups.

Algebraic Geometry · Mathematics 2013-02-21 Philippe Eyssidieux

In this paper, we prove the holomorphic convexity of the covering of a complex projective {normal} variety $X$, which corresponds to the intersection of kernels of reductive representations $\rho:\pi_1(X)\to {\rm GL}_{N}(\mathbb{C})$,…

Algebraic Geometry · Mathematics 2024-05-30 Ya Deng , Katsutoshi Yamanoi , Ludmil Katzarkov

We shall show that a smooth, quasi-projective variety $X$ has a holomorphically convex universal covering $\wt X$ when (i) $\pi_1(X)$ is residually nilpotent and (ii) there is an admissable variation of \mhs\ over $X$ whose monodromy…

Algebraic Geometry · Mathematics 2022-10-17 Mark Green , Phillip Griffiths , Ludmil Katzarkov

We initiate the study of the asymptotic topology of groups that can be realized as fundamental groups of smooth complex projective varieties with holomorphically convex universal covers (these are called here as holomorphically convex…

Geometric Topology · Mathematics 2016-12-30 Indranil Biswas , Mahan Mj

In the paper we prove a factorization theorem for representations of fundamental groups of compact K\"{a}hler manifolds ({\em K\"{a}hler groups}) into solvable matrix groups. We apply this result to prove that the universal covering of a…

Complex Variables · Mathematics 2007-05-23 Alexander Brudnyi

We initiate the study of holomorphically convex groups: groups that can be realized as fundamental groups of smooth complex projective varieties with holomorphically convex universal covers. If $G$ is a holomorphically convex group of…

Geometric Topology · Mathematics 2014-02-27 Indranil Biswas , Mahan Mj

We will prove that given a genus-2 fibration $f: X \rightarrow C$ on a smooth projective surface $X$ such that $b_1(X)=b_1(C)+2$, the fundamental group of $X$ is almost isomorphic to $\pi_1(C) \times \pi_1(E)$, where $E$ is an elliptic…

Algebraic Geometry · Mathematics 2015-12-31 R. V. Gurjar , Sagar Kolte

A representation of a finitely generated group into the projective general linear group is called convex co-compact if it has finite kernel and its image acts convex co-compactly on a properly convex domain in real projective space. We…

Geometric Topology · Mathematics 2024-03-19 Mitul Islam , Andrew Zimmer

This article is concerned with the convexity properties of universal covers of projective varieties. We study the relation between the convexity properties of the universal cover of X and the properties of the pullback map sending vector…

Algebraic Geometry · Mathematics 2007-05-23 F. Bogomolov , B. De Oliveira

Let X be a compact Kahler manifold with negative sectional curvature and residually finite fundamental group. Then its universal covering is a bounded domain in an affine space.

Algebraic Geometry · Mathematics 2015-03-04 Robert Treger

Let X be a normal connected complex algebraic variety equipped with a semisimple complex representation of its fundamental group. Then, under a maximality assumption, we prove that the covering space of X associated to the kernel of the…

Algebraic Geometry · Mathematics 2023-05-18 Yohan Brunebarbe

Let U be a universal covering of a connected nonsingular projective variety X with large and residually finite fundamental group. We construct metrics on U and provide another version of the uniformization theorem, namely: if the…

Algebraic Geometry · Mathematics 2014-12-31 Robert Treger

Let f: X -> Y be a smooth family of canonically polarized complex varieties over a smooth base. Generalizing the classical Shafarevich hyperbolicity conjecture, Viehweg conjectured that Y is necessarily of log general type if the family has…

Algebraic Geometry · Mathematics 2007-05-23 Stefan Kebekus , Sandor Kovacs
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