Antispecial cycles on the Drinfeld upper half plane and degenerate Hirzebruch–Zagier cycles

Antispecial cycles on the Drinfeld upper half plane and degenerate Hirzebruch–Zagier cycles
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德林费尔德上半平面上的反特循环和简并赫策布鲁赫-扎吉尔循​​环

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发表时间:
2006
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通讯作者:
Ulrich Terstiege
Ulrich Terstiege
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作者:
Ulrich Terstiege

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我们在Drinfeld上半平面上定义了反特殊圈的概念,类似于Kudla和Rapoport中的特殊圈的概念(发明数学142:153-223,2000)。我们确定了反特殊圈的方程,并计算了两个反特殊圈的交重数。应用该结果计算了某些退化的Hirzebruch-Zagier圈的交重数。最后,我们将这种交的重数与某些表示密度进行了比较。
We define the notion of antispecial cycles on the Drinfeld upper half plane in analogy to the notion of special cycles in Kudla and Rapoport (Invent Math 142:153–223, 2000). We determine equations for antispecial cycles and calculate the intersection multiplicity of two antispecial cycles. The result is applied to calculate the intersection multiplicity of certain degenerate Hirzebruch–Zagier cycles. Finally we compare this intersection multiplicity to certain representation densities.