Limits of special Weierstrass points
Limits of special Weierstrass points
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特殊Weierstrass点的限制
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
Letterio Gatto
中科院分区:
文献类型:
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作者:
Caterina Cumino;E. Esteves;Letterio Gatto
Let C be the union of two general connected, smooth, nonrational curves X and Y inter- secting transversally at a point P. Assume that P is a general point of X or of Y. Our main result describes all limits on C of special Weierstrass points along smooth curves degenerating to C . As an application, we recover in a unified and conceptually simpler way the computations made by Diaz and Cukierman of divisor classes of curves with special Weierstrass points in the moduli space of stable curves. In our approach there are no multiplicity issues, an usual nuisance of the method of test curves