科研之友
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摘要
The complement M of a complex line arrangement A in P(2) (C) is formal, and admits a finite cover F. M, where F is the associated global Milnor fibre. An example where F is not formal (not even 1-formal), is given in this article, using the relationship between characteristic varieties of rank one local systems and resonance varieties.
- 出版日期2010-10
