@article{f3897db2216944aaa29d0ed7ff587674,
title = "Co-fibered products of algebraic curves",
abstract = "We give examples of failure of the existence of co-fibered products in the category of algebraic curves.",
keywords = "Arithmetic group, Quaternion algebra, Shimura variety, Unramified cover",
author = "Fedor Bogomolov and Yuri Tschinkel",
note = "Funding Information: We are grateful to M. Rovinsky who brought to our attention the above results in positive characteristic. The first author was partially supported by NSF grant DMS-0701578. The second author was partially supported by NSF grants DMS-0554280 and DMS-0602333.",
year = "2009",
doi = "10.2478/s11533-009-0030-7",
language = "English (US)",
volume = "7",
pages = "382--386",
journal = "Open Mathematics",
issn = "1895-1074",
publisher = "Walter de Gruyter GmbH & Co. KG",
number = "3",
}