Minimal relative Hilbert-Kunz multiplicity
Minimal relative Hilbert-Kunz multiplicity
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DOI:
10.1215/ijm/1258136184
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发表时间:
2004-01
影响因子:
0.6
通讯作者:
Kei-ichi Watanabe;KEN-ICHI Yoshida
中科院分区:
文献类型:
--
作者:
Kei-ichi Watanabe;KEN-ICHI Yoshida
. In this paper we ask the following question: What is the minimal value of the difference e HK ( I ) − e HK ( I (cid:48) ) for ideals I (cid:48) ⊇ I with l A ( I (cid:48) /I ) = 1? In order to answer to this question, we define the notion of minimal relative Hilbert-Kunz multiplicity for strongly F -regular rings. We calculate this invariant for quotient singularities and for the coordinate rings of Segre embeddings: P r − 1 × P s − 1 (cid:44) → P rs − 1 .