Counting lines on surfaces

Counting lines on surfaces
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计算表面上的线数

DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
A. Sarti
A. Sarti
中科院分区:
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文献类型:
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作者:
S. Boissière;A. Sarti

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本文讨论了具有多条直线的曲面。众所周知,一个三次曲线包含27个,而一个四次曲线的最大数目是64。在更高的程度上,这个问题仍然是开放的。在这里,我们研究经典和新的建设的表面与大量的线。我们得到了一个有352条线的对称八次曲线,并给出了包含d(d − 2)+ 4条斜直线序列的d次曲面的例子。27条线的三次曲面
This paper deals with surfaces with many lines. It is well-known that a cubic contains 27 of them and that the maximal number for a quartic is 64. In higher degree the question remains open. Here we study classical and new constructions of surfaces with high number of lines. We obtain a symmetric octic with 352 lines, and give examples of surfaces of degree d containing a sequence of d(d − 2) + 4 skew lines. Cubic surface with 27 lines