期刊
ST PETERSBURG MATHEMATICAL JOURNAL
卷 20, 期 5, 页码 837-849出版社
AMER MATHEMATICAL SOC
DOI: 10.1090/S1061-0022-09-01075-9
关键词
Affine winding number; linking number; invariant
类别
资金
- NSF [0406311]
- Direct For Mathematical & Physical Scien
- Division Of Mathematical Sciences [0406311] Funding Source: National Science Foundation
Let M(m) be an oriented manifold, let N(m-1) be an oriented closed manifold, and let p be a point in M(m). For a smooth map f : N(m-1 ->)M(m), p is not an element of Im f, an invariant awin(p)(f) is introduced, which can be regarded as a generalization of the classical winding number of a planar curve around a point. It is shown that awin(p) estimates from below the number of passages of a wave front on M through a given point p is an element of M between two moments of time. The invariant awin(p) makes it possible to formulate an analog of the complex analysis Cauchy integral formula for meromorphic functions on complex surfaces of genus exceeding one.
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