The Geer–Young TQFT identification for punctured surfaces

Let Fg,pF_{g,p} be the surface of genus gg with p1p\geq 1 boundary components, viewed with all boundary components as punctures labeled by V(0,0)0V(0,0)_{\overline{0}}. Let ZGY\mathbf{Z}^{GY} be the Geer–Young TQFT, whose state space is graded by the second factor of Z=Z×Z×Z/2ZZ=\mathbb{Z}\times\mathbb{Z}\times\mathbb{Z}/2\mathbb{Z}. Let δ1/2\delta_{1/2} and π1/2\pi_{1/2} be the degree-shift and parity functions defined above, and let Zδ1/2,π1/2S+\mathbf{Z}^{S_+}_{\delta_{1/2},\pi_{1/2}} denote the corresponding shifted and parity-refined state space. Geer–Young TQFT identification. There is an isomorphism of Z\mathbb{Z}-graded super vector spaces

Zδ1/2,π1/2S+(Fg,p)ZGY(Fg,p).\mathbf{Z}^{S_+}_{\delta_{1/2},\pi_{1/2}}(F_{g,p})\cong\mathbf{Z}^{GY}(F_{g,p}).

This identifies the proposed surface-gluing construction with the Geer–Young theory for these punctured surfaces, including its grading and parity conventions. The source does not provide evidence that the asserted identification has been proved, so its status remains open.

Sources & referencesView supporting material

Primary source

Andrew Manion, “Surface gluing with signs and gradings in decategorified Heegaard Floer theory”, arXiv:2303.02889 (2023).

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