Singular TQFTs, Foams and Type D Arc Algebras
Arik Wilbert
Department of Mathematics, University of Georgia, Athens, GA 30602, 526 Boyd GSRC, USADaniel Tubbenhauer
Institut für Mathematik, Universität Zürich, Winterthurerstrasse 190, Campus Irchel, CH-8057 Zürich, SwitzerlandMichael Ehrig
Beijing Institute of Technology, School of Mathematics and Statistics, Liangxiang Campus of Beijing Institute of Technology, Fangshan District, 100488 Beijing, China

Abstract
We combinatorially describe the 2-category of singular cobordisms, called (rank one) foams, which governs the functorial version of Khovanov homology. As an application we topologically realize the type D arc algebra using this singular cobordism construction.
Cite this article
Arik Wilbert, Daniel Tubbenhauer, Michael Ehrig, Singular TQFTs, Foams and Type D Arc Algebras. Doc. Math. 24 (2019), pp. 1585–1655
DOI 10.4171/DM/710