Cuspidal plane curves, syzygies and a bound on the MW-rank
Cuspidal plane curves, syzygies and a bound on the MW-rank
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尖端平面曲线、syzygies 和 MW 等级的界限
DOI:
10.1016/j.jalgebra.2012.11.015
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
R. Kloosterman
中科院分区:
文献类型:
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作者:
R. Kloosterman
Let C=Z(f) be a reduced plane curve of degree 6k, with only nodes and ordinary cusps as singularities. Let I be the ideal of the points where C has a cusp. Let ⊕S(−bi)→⊕S(−ai)→S→S/I be a minimal resolution of I. We show that bi⩽5k. From this we obtain that the Mordell–Weil rank of the elliptic threefold W:y2=x3+f equals 2#{i|bi=5k}. Using this we find an upper bound for the Mordell–Weil rank of W, which is 118(125+73−2302−10673)k+l.o.t. and we find an upper bound for the exponent of (t2−t+1) in the Alexander polynomial of C, which is 136(125+73−2302−10673)k+l.o.t. This improves a recent bound of Cogolludo and Libgober almost by a factor 2.
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DOI:
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发表时间:
2008
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影响因子:
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作者:
K. Hulek;R. Kloosterman
通讯作者:
R. Kloosterman
DOI:
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发表时间:
1990
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作者:
A. Dimca
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A. Dimca
DOI:
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发表时间:
1983
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作者:
A. Libgober
通讯作者:
A. Libgober
DOI:
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发表时间:
2000
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影响因子:
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作者:
A. Langer
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A. Langer