Abstracts for Conference on "Quantum Topology"

The $SL_2(C)$-skein modules of closed 3-manifolds were defined by in the 90’s but till recently little was known about their structure. The modules depend on a parameter A and can be considered over $ {\mathbb Z}[A^{\pm 1}]$ or over ${\mathbb Q}(A)$.

The ${\mathbb Q}(A)$-module is known to be finitely generated  while the structure over ${\mathbb Z}[A^{\pm 1}]$ can be complicated.

The Matveev-Piergallini (MP) moves on spines of 3-manifolds are well-known for their correspondence with the Pachner 2-3 moves in dual ideal triangulations. Benedetti and Petronio introduced combinatorial descriptions of closed 3-manifolds and combed 3-manifolds using branched spines and their equivalence relations, which involve MP moves with 16 distinct branching patterns. In this talk, I will demonstrate that these 16 MP moves on branched spines are derived from a primary MP move, pure sliding moves, and their inverses.