The Blanchet-Khovanov algebras
classification
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algebrasblanchetcobordismssingularalgebraicblanchet-khovanovcertaincombinatorics
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Blanchet introduced certain singular cobordisms to fix the functoriality of Khovanov homology. In this paper we introduce graded algebras consisting of such singular cobordisms \`a la Blanchet. As the main result we give algebraic versions of these algebras using the combinatorics of arc diagrams.
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