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- W2523687586 abstract "It is an open problem whether Kirk's $sigma$ invariant is the complete obstruction to a link map $S^2cup S^2to S^4$ being link homotopically trivial. With the objective of constructing counterexamples, Li proposed a link homotopy invariant $omega$ that is defined on the kernel of $sigma$ and also obstructs link nullhomotopy. We show that $omega$ is determined by $sigma$, and is a strictly weaker invariant." @default.
- W2523687586 created "2016-09-30" @default.
- W2523687586 creator A5037744235 @default.
- W2523687586 date "2016-09-20" @default.
- W2523687586 modified "2023-09-27" @default.
- W2523687586 title "The triviality of a certain invariant of link maps in the four-sphere" @default.
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