Abstract

In the study of 3d-3d correspondence occurs a natural qq-Weyl algebra associated to an ideal triangulation of a 3-manifold with torus boundary components, and a module of it. We study the action of this module on the (rotated) 3d-index of Dimofte-Gaiotto-Gukov and we conjecture some structural properties: bilinear factorization in terms of holomorphic blocks, pair of linear qq-difference equations, the determination of the 3d-index in terms of a finite size matrix of rational functions and the asymptotic expansion of the qq-series as qq tends to 1 to all orders. We illustrate our conjectures with computations for the case of the three simplest hyperbolic knots.

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