2015
DOI: 10.4064/aa171-2-3
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Quadratic congruences on average and rational points on cubic surfaces

Abstract: Abstract. -We investigate the average number of solutions of certain quadratic congruences. As an application, we establish Manin's conjecture for a cubic surface whose singularity type is A 5 + A 1 .

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Cited by 6 publications
(5 citation statements)
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References 18 publications
(21 reference statements)
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“…As a consequence, our result can be seen as a new record since V is the first example of cubic surface with N = 4 for which Manin's conjecture is proved. Previously, Manin's conjecture was known for only two non-toric cubic surfaces with N = 6 (see [BBD07] and [BD12]) and two cubic surfaces with N = 5 (see [BD09] and [LB11]).…”
Section: Singularity Type Number Of Lines Resultsmentioning
confidence: 99%
“…As a consequence, our result can be seen as a new record since V is the first example of cubic surface with N = 4 for which Manin's conjecture is proved. Previously, Manin's conjecture was known for only two non-toric cubic surfaces with N = 6 (see [BBD07] and [BD12]) and two cubic surfaces with N = 5 (see [BD09] and [LB11]).…”
Section: Singularity Type Number Of Lines Resultsmentioning
confidence: 99%
“…Type A 1 A 5 D'après [BD15], les surfaces de type XX à singularités A 1 A 5 ont pour équation (à isomorphisme près) :…”
Section: D'après ([Bl98] Tableunclassified
“…To define the fan Σ, we first define its maximal cones. For example, σ + : > intmat mplus [3][3] = > -3,-3,-2, > 3,0,1, > 0,2,1;…”
Section: Computational Preparationsmentioning
confidence: 99%
“…. , T 5 ] is classically homogeneous of degree 2 with g ′ ∈ T 4 , T 5 , h ∈ T 1 , T 2 , T3 and g defines a smooth conic (30). The smooth Fano threefold X 30 has the Z 2 -graded Cox ring K[T 1 , .…”
mentioning
confidence: 99%