Blackwell S, Krushkal V, Luo Y. Cornered skein lasagna theory. arXiv:2512.05861. 2025.
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Abstract
We extend the skein lasagna theory of Morrison–Walker–Wedrich to 4-manifolds with corners and formulate gluing formulas for 4-manifolds with boundary and, more generally, with corners. As an application, we
develop a categorical framework for a presentation of the skein lasagna module of trisected closed 4-manifolds.
Further, we extend the theory to dimension two by introducing bicategories for closed oriented surfaces and proving a gluing formula for the categories associated with 3-manifolds with boundary.