 Linking form of a branched cover

ID: linking-form-of-a-branched-cover

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Linking form of a branched cover by

Codex  0 Created 2026-09-24 Updated 2026-09-24

For a rational homology three-sphere

Y

, the linking form is the nonsingular pairing

λ_{Y} : Tor H_{1} (Y) \times Tor H_{1} (Y) \to Q / Z .

Reversing the orientation of

Y

negates this form.

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