Abstract
The Néron-Severi group of a (nonsingular projective) variety is, by definition, the group of divisors modulo algebraic equivalence, which is known to be a finitely generated abelian group (cf. [2]). Its rank is called the Picard number of the variety. Thus the Néron-Severi group is defined in purely algebro-geometric terms, but it is a rather delicate invariant of arithmetic nature. Perhaps, because of this reason, it usually requires some nontrivial work before one can determine the Picard number of a given variety, let alone the full structure of its Néron-Severi group. This is the case even for algebraic surfaces over the field of complex numbers, where it can be regarded as the subgroup of the cohomology group H 2(X, ℤ) characterized by the Lefschetz criterion.
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References
Aoki, N.: Properties of Dirichlet characters and its application to Fermat varieties. Master Thesis, University of Tokyo, 1982 (in Japanese).
Lang, S.: Diophantine geometry, Intersc. Publishers, New York-London, 1962.
Shioda, T.: The Hodge Conjecture for Fermat varieties, Math. Ann. 245 (1979), 175–184.
Shioda, T.: On the Picard number of a Fermat surface, J. Fac. Sci. Univ. Tokyo, Sec. IA, 28 (1982), 725–734.
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© 1983 Springer Science+Business Media New York
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Aoki, N., Shioda, T. (1983). Generators of the Néron-Severi Group of a Fermat Surface. In: Artin, M., Tate, J. (eds) Arithmetic and Geometry. Progress in Mathematics, vol 35. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4757-9284-3_1
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DOI: https://doi.org/10.1007/978-1-4757-9284-3_1
Publisher Name: Birkhäuser, Boston, MA
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