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We formulate a conjecture on the number of integral points of bounded height on log Fano varieties in analogy with Manin's conjecture on the number of rational points of bounded height on Fano varieties. We also give a prediction for the…

Number Theory · Mathematics 2025-08-04 Tim Santens

We prove Manin's conjecture for two del Pezzo surfaces of degree four which are split over Q and whose singularity types are respectively 3A_1 and A_1+A_2. For this, we study a certain restricted divisor function and use a result about the…

Number Theory · Mathematics 2011-11-22 Pierre Le Boudec

This paper surveys recent progress towards the Manin conjecture for (singular and non-singular) del Pezzo surfaces. To illustrate some of the techniques available, an upper bound of the expected order of magnitude is established for a…

Number Theory · Mathematics 2007-05-23 T. D. Browning

We prove a version of Manin's conjecture for a certain family of intrinsic quadrics, the base field being a global field of positive characteristic. We also explain how a very slight variation of the method we use allows to establish the…

Number Theory · Mathematics 2010-07-28 David Bourqui

In his book "Cubic forms" Manin discovered that del Pezzo surfaces are related to root systems. To explain the many numerical coincidences Batyrev conjectured that a universal torsor on a del Pezzo surface can be embedded in a certain…

Algebraic Geometry · Mathematics 2008-05-31 Vera Serganova , Alexei Skorobogatov

We prove the "all-the-heights'' version of the Batyrev--Manin--Peyre conjecture for split quintic del Pezzo surfaces, both for counting rational points over global function fields in positive characteristic and for the motivic version over…

Algebraic Geometry · Mathematics 2026-03-31 Christian Bernert , Loïs Faisant , Jakob Glas

In this paper the height zeta function associated to a certain singular del Pezzo surface of degree four is studied. If $U$ denotes the open subset formed by deleting the unique line from this surface, then an asymptotic formula for the…

Number Theory · Mathematics 2007-05-23 R. de la Breteche , T. D. Browning

We study the spaces of rational curves on Fano threefolds with Gorenstein terminal singularities. We generalize the results regarding Geometric Manin's Conjecture for smooth Fano threefolds, including the classification of subvarieties with…

Algebraic Geometry · Mathematics 2025-05-23 Fumiya Okamura

Manin's conjecture is proved for a split del Pezzo surface of degree 5 with a singularity of type A_2.

Number Theory · Mathematics 2007-10-09 Ulrich Derenthal

We investigate Manin's conjecture for del Pezzo surfaces of degree five with a conic bundle structure, proving matching upper and lower bounds, and the full conjecture in the Galois general case.

Number Theory · Mathematics 2025-06-04 D. R. Heath-Brown , Daniel Loughran

We prove that the number of rational points of bounded height on certain del Pezzo surfaces of degree 1 defined over Q grows linearly, as predicted by Manin's conjecture. Along the way, we investigate the average number of integral points…

Number Theory · Mathematics 2013-08-02 Pierre Le Boudec

We count rational points of bounded height on the non-normal senary quartic hypersurface x 4 = (y 2 1 + $\times$ $\times$ $\times$ + y 2 4)z 2 in the spirit of Manin's conjecture.

Number Theory · Mathematics 2018-09-17 Jianya Liu , Jie Wu , Yongqiang Zhao

This paper establishes the Manin conjecture for a certain non-split singular del Pezzo surface of degree four, via an analysis of the corresponding height zeta function.

Number Theory · Mathematics 2007-06-13 R. de la Breteche , T. D. Browning

We prove a version of Manin's conjecture (over $\mathbb{F}_{q}$ for $q$ large) and the Cohen--Jones--Segal conjecture (over $\mathbb{C}$) for maps from rational curves to split quartic del Pezzo surfaces. The proofs share a common method…

Algebraic Geometry · Mathematics 2025-06-23 Ronno Das , Brian Lehmann , Sho Tanimoto , Philip Tosteson

Let X be a surface whose Cox ring has a single relation satisfying moreover a kind of linearity property. Under a simple assumption, we show that the geometric Manin's conjectures hold for some degrees lying in the dual of the effective…

Algebraic Geometry · Mathematics 2012-05-17 David Bourqui

This paper initiates the systematic study of the number of points of bounded height on symmetric squares of weak Fano varieties. We provide a general framework for establishing the point count on $\text{Sym}^2 X$. In the specific case of…

Number Theory · Mathematics 2025-06-10 Francesca Balestrieri , Kevin Destagnol , Julian Lyczak , Jennifer Park , Nick Rome

Gamma conjecture I and the underlying Conjecture $\mathcal{O}$ for Fano manifolds were proposed by Galkin, Golyshev and Iritani recently. We show that both conjectures hold for all two-dimensional Fano manifolds. We prove Conjecture…

Algebraic Geometry · Mathematics 2019-01-08 Jianxun Hu , Hua-Zhong Ke , Changzheng Li , Tuo Yang

We prove Manin's conjecture for a del Pezzo surface of degree six which has one singularity of type $\mathbf{A}_2$. Moreover, we achieve a meromorphic continuation and explicit expression of the associated height zeta function.

Number Theory · Mathematics 2010-09-14 Daniel Loughran

For split smooth Del Pezzo surfaces, we analyse the structure of the effective cone and prove a recursive formula for the value of alpha, appearing in the leading constant as predicted by Peyre of Manin's conjecture on the number of…

Number Theory · Mathematics 2007-05-23 Ulrich Derenthal

By a heuristic argument, we relate two conjectures. One is a version of Manin's conjecture about the distribution of rational points on a Fano variety. We concern specific singular Fano varieties, namely quotients of projective spaces by…

Number Theory · Mathematics 2015-05-19 Takehiko Yasuda