Surface gluing with signs and gradings in decategorified Heegaard Floer theory

A previous result about the decategorified bordered (sutured) Heegaard Floer invariants of surfaces glued together along intervals, generalizing the decategorified content of Rouquier and the author's higher-tensor-product-based gluing theorem in cornered Heegaard Floer homology, was proved only over $\mathbb{F}_2$ and without gradings. In this paper we add signs and prove a graded version of the interval gluing theorem over $\mathbb{Z}$, enabling a more detailed comparison of these aspects of decategorified Heegaard Floer theory with modern work on non-semisimple 3d TQFTs in mathematics and physics.

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