Universally tight toric-annulus conjecture for adding Giroux torsion

Let TT be a convex incompressible torus in a tight contact 3-manifold (Y,ξ)(Y,\xi) such that every toric annulus neighborhood of TT with convex boundary is universally tight. Conjecture. The contact 3-manifold obtained by adding Giroux torsion in a neighborhood of TT is tight.

This conjecture proposes a sufficient condition for adding Giroux torsion near an incompressible torus while preserving tightness. The surrounding discussion relates it to Honda's work and notes that the toric annulus neighborhoods must be universally tight, even though the ambient contact 3-manifold need not be universally tight.

Sources & referencesView supporting material

Primary source

Tanushree Shah and Jonathan Simone, “Tight contact structures on toroidal plumbed 3-manifolds”, arXiv:2412.10225 (2025).

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