3 citations · 6 across the 9 of their papers we have counts for
Showing 2019Show all
3 papers · 1 filter
math.GT2019★ 3 cited
Relative Vertex Asphericity
Jens Harlander, Stephan Rosebrock
Diagrammatic reducibility DR and its generalization vertex asphericity VA are combinatorial tools developed for detecting asphericity of a 2-complex. Here we present tests for a re…
math.GT2019
Relative Combinatorial Asphericity
Stephan Rosebrock, Jens Harlander
Relative notions of combinatorial asphericity have been used to prove that injective labeled oriented trees (which encode spines of ribbon 2-knots) are aspherical. This article pre…
math.GT2019
Directed diagrammatic reducibility
Jens Harlander, Stephan Rosebrock
We introduce the notion of directed diagrammatic reducibility which is a relative version of diagrammatic reducibility. Directed diagrammatic reducibility has strong group theoreti…