On finite type 3-manifold invariants I
On finite type 3-manifold invariants I
复制标题
关于有限型 3 流形不变量 I
DOI:
10.1142/s0218216596000278
复制
发表时间:
1996
影响因子:
0.5
通讯作者:
S. Garoufalidis
中科院分区:
文献类型:
--
作者:
S. Garoufalidis
Recently Ohtsuki [Oh2], motivated by the notion of finite type knot invariants, introduced the notion of finite type invariants for oriented, integral homology 3-spheres. In the present paper we propose another definition of finite type invariants of integral homology 3-spheres and give equivalent reformulations of our notion. We show that our invariants form a filtered commutative algebra. We compare the two induced filtrations on the vector space on the set of integral homology 3-spheres. As an observation, we discover a new set of restrictions that finite type invariants in the sense of Ohtsuki satisfy and give a set of axioms that characterize the Casson invariant. Finally, we pose a set of questions relating the finite type 3-manifold invariants with the (Vassiliev) knot invariants.