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Néron-Severi Group


Let V be a complete normal variety, and write G(V) for the group of divisors, G_n(V) for the group of divisors numerically equal to 0, and G_a(V) the group of divisors algebraically equal to 0. Then the finitely generated quotient group NS(V)=G(V)/G_a(V) is called the Néron-Severi group.


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References

Iyanaga, S. and Kawada, Y. (Eds.). Encyclopedic Dictionary of Mathematics. Cambridge, MA: MIT Press, p. 75, 1980.

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Néron-Severi Group

Cite this as:

Weisstein, Eric W. "Néron-Severi Group." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Neron-SeveriGroup.html

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