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5 results for “Schneiderman-Teichner”

On invariants of link maps in dimension fourmath.GT

Affirms link homotopy invariant definition and adapts Schneiderman-Teichner's invariant.

problem Defining and adapting link homotopy invariants.

method Adapting Schneiderman-Teichner's invariant to link maps and affirming Li's invariant.

result Adapted invariant

τ

coincides with Li's invariant

ω

link homotopy invariants dimension four Schneiderman-Teichner

2015-12-30abs ↗pdf ↗

The Schneiderman-Teichner invariant applied to immersions arising from link maps in

S^4

math.GT

It is shown that Schneiderman and Teichner's invariant $τ$ detects the example due to Kirk of a link map $f:S^2_+\cup S^2_-\to S^4$ for which the restricted map $f|S^2_+:S^2_+\to S^4-f(S^2_-)$ has vanishing Wall self-intersection but is not homotopic to an embedding.