Horikawa surfaces with maximal Picard numbers

Horikawa surfaces with maximal Picard numbers
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具有最大皮卡数的堀川曲面

DOI:
10.1007/bf01456942
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发表时间:
1982
影响因子:
1.4
通讯作者:
U. Persson
U. Persson
中科院分区:
数学2区
文献类型:
--
作者:
U. Persson

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给定一个紧致非奇异曲面X,我们可以考虑它的因子根的Neron-Severi群,从此记为NS(X)。众所周知(参见[1,p.461]),我们可以用Hz(X,Z)c~ Hi 'i(X,C)来确定NS(X);通过chern映射c1:Hi((9*)~ H2(X,7 l),它将每个除数D与一个积分2-形式ct(D)联系起来,ct(D)是D的chern类。X的皮卡数将由o(X)表示,并且被定义为等于dimQNS(X)。|
Given a compact non-singular surface X, we can consider its Neron-Severi group, henceforward denoted by NS (X), of divisors rood numerical equivalence. It is well-known (see eg [1, p. 461]) that we can identify NS (X) with Hz (X, Z) c~ H i'i (X, C); via the chern map c 1: Hi ((9*)~ H2 (X, 7l) which associates to each divisor D an integral 2-form ct (D)-the chern class of D. The Picard number of X, will be denoted by o (X), and defined to be equal to dimQNS (X)|