DOODLE GROUPS
DOODLE GROUPS
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涂鸦组
DOI:
10.1090/s0002-9947-97-01706-6
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
Mikhail Khovanov
中科院分区:
文献类型:
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作者:
Mikhail Khovanov
. A doodle is a (cid:12)nite number of closed curves without triple inter-sections on an oriented surface. There is a \fundamental" group, naturally associated with a doodle. In this paper we study these groups, in particular, we show that fundamental groups of some doodles are automatic and give examples of doodles whose fundamental groups have non-trivial center.