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We give a criterion for a projective surface to become a quotient of a fake projective plane. We also give a detailed information on the elliptic fibration of a $(2,3)$-elliptic surface that is the minimal resolution of a quotient of a fake…

Algebraic Geometry · Mathematics 2010-10-19 JongHae Keum

Fake projective planes are smooth complex surfaces of general type with Betti numbers equal to those of the usual projective plane. They come in complex conjugate pairs and have been classified as quotients of the two-dimensional ball by…

Algebraic Geometry · Mathematics 2020-12-16 Lev A. Borisov , JongHae Keum

A fake projective plane is a complex surface with the same Betti numbers as $\mathbb{C} P^2$ but not biholomorphic to it. We study the fake projective plane $\mathbb{P}_{\operatorname{fake}}^2 = (a = 7, p = 2, \emptyset, D_3 2_7)$ in the…

Algebraic Geometry · Mathematics 2026-02-04 Lev Borisov , Mattie Ji , Yanxin Li , Sargam Mondal

A fake projective plane is a compact complex manifold of dimension 2 which has the same Betti numbers as the complex projective plane, but not isomorphic to the complex projective plane. As was shown by D. Mumford, there exists at least one…

Algebraic Geometry · Mathematics 2007-05-23 JongHae Keum

Fundamental groups of fake projective planes fall into fifty distinct isomorphism classes, one for each complex conjugate pair. We prove that this is not the case for their algebraic fundamental groups: there are only forty-six isomorphism…

Algebraic Geometry · Mathematics 2024-02-28 Matthew Stover

A fake projective plane is a smooth complex surface which is not the complex projective plane but has the same Betti numbers as the complex projective plane. The first example of such a surface was constructed by David Mumford in 1979 using…

Algebraic Geometry · Mathematics 2019-03-07 Gopal Prasad , Sai-Kee Yeung

We find explicit equations of the fake projective plane $(a=7,p=2,\emptyset,D_3 X_7)$, which lies in the same class as the fake projective plane $(a=7,p=2,\emptyset,D_3 2_7)$ with $21$ automorphisms whose equations were previously found by…

Algebraic Geometry · Mathematics 2023-09-06 Lev Borisov , Mattie Ji , Yanxin Li

Fake projective planes are smooth complex surfaces of general type with Betti numbers equal to that of the usual projective plane. Recent explicit constructions of fake projective planes embed them via their bicanonical embedding in…

Algebraic Geometry · Mathematics 2023-03-20 Lev Borisov , Zachary Lihn

On the projective plane there is a unique cubic root of the canonical bundle and this root is acyclic. On fake projective planes such root exists and is unique if there are no 3-torsion divisors (and usually exists, but not unique,…

Algebraic Geometry · Mathematics 2023-03-14 Sergey Galkin , Ilya Karzhemanov , Evgeny Shinder

We study Dolgachev elliptic surfaces with a double and a triple fiber and find explicit equations of two new pairs of fake projective plane with $21$ automorphisms, thus finishing the task of finding explicit equations of fake projective…

Algebraic Geometry · Mathematics 2026-05-06 Lev Borisov

We discover a family of surfaces of general type with $K^2=3$ and $p=q=0$ as free $C_{13}$ quotients of special linear cuts of the octonionic projective plane $\mathbb O \mathbb P^2$. A special member of the family has $3$ singularities of…

Algebraic Geometry · Mathematics 2020-08-25 Lev Borisov , Anders Buch , Enrico Fatighenti

For every fake projective plane $X$ with automorphism group of order 21, we prove that $H^i(X, 2L)=0$ for all $i$ and for every ample line bundle $L$ with $L^2=1$. For every fake projective plane with automorphism group of order 9, we prove…

Algebraic Geometry · Mathematics 2015-02-06 JongHae Keum

We study complex projective plane curves with a given group of automorphisms. Let $G$ be a simple primitive subgroup of $PGL(3, \mathbb{C})$, which is isomorphic to $A_{6}$, $A_{5}$ or $PSL(2, \mathbb{F}_{7})$. We obtain a necessary and…

Algebraic Geometry · Mathematics 2020-09-01 Yusuke Yoshida

A fake quadric is a smooth minimal surface of general type with the same invariants as the quadric in P^3, i.e. K^2=2c_2=8 and q=p_g=0. We study here quaternionic fake quadrics i.e. fake quadrics constructed arithmetically by using some…

Algebraic Geometry · Mathematics 2016-01-20 Amir Dzambic , Xavier Roulleau

The addendum updates the results presented in the paper `Fake Projective Plane, Invent Math 168, 321-370 (2007)' and makes some additions and corrections. The fake projective planes are classified into twenty six classes. Together with a…

Algebraic Geometry · Mathematics 2015-05-13 Gopal Prasad , Sai-Kee Yeung

We show, for several fake projective planes with nontrivial automorphism group, that the bicanonical map is an embedding.

Algebraic Geometry · Mathematics 2018-03-28 Fabrizio Catanese , JongHae Keum

We construct the first examples of what we call fake ES-irreducible components; Definition 2.8. In our way to do so, we classify the automorphism groups of smooth plane sextics that only have automorphisms of order 3 or less; Theorems 2.1,…

Algebraic Geometry · Mathematics 2023-09-19 Eslam Badr , Francesc Bars

The purpose of the article is to explain a new method to establish the existence of an exceptional collection of length three for a fake projective plane M with non-trivial automorphism group, related to a conjecture of…

Algebraic Geometry · Mathematics 2021-08-06 Ching-Jui Lai , Sai-Kee Yeung

For every p >= 5, we determine all Z_p-invariant nonsingular quartic surfaces in the three dimensional projective space over an algebraically closed field of characteristic zero. In some cases, we also determine their full projective…

Algebraic Geometry · Mathematics 2019-09-09 Stefano Marcugini , Fernanda Pambianco , Hitoshi Kaneta

Let $G$ be a subgroup of the three dimensional projective group $\mathrm{PGL}(3,q)$ defined over a finite field $\mathbb{F}_q$ of order $q$, viewed as a subgroup of $\mathrm{PGL}(3,K)$ where $K$ is an algebraic closure of $\mathbb{F}_q$.…

Algebraic Geometry · Mathematics 2022-02-14 H. Borges , G. Korchmáros , P. Speziali
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