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Unlikely intersections with ExCM curves in A2

Daw, C. and Orr, M. (2021) Unlikely intersections with ExCM curves in A2. Annali della Scuola Normale Superiore di Pisa, 22 (4). ISSN 2036-2145

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To link to this item DOI: 10.2422/2036-2145.202006_014


The Zilber--Pink conjecture predicts that an algebraic curve in A2 has only finitely many intersections with the special curves, unless it is contained in a proper special subvariety. Under a large Galois orbits conjecture, we prove the finiteness of the intersection with the special curves parametrising abelian surfaces isogenous to the product of two elliptic curves, at least one of which has complex multiplication. Furthermore, we show that this large Galois orbits conjecture holds for curves satisfying a condition on their intersection with the boundary of the Baily--Borel compactification of A2. More generally, we show that a Hodge generic curve in an arbitrary Shimura variety has only finitely many intersection points with the generic points of a Hecke--facteur family, again under a large Galois orbits conjecture.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:91846
Publisher:Scuola Normale Superiore di Pisa


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