2 papers
math.GT2023
Relative Non-Positive Immersion
Jens Harlander, Stephan Rosebrock
A 2-complex has collapsing non-positive immersion if for every combinatorial immersion , where is finite, connected and does not allow collapses, either …
math.GT2014
Aspherical Word Labeled Oriented Graphs and Cyclically Presented Groups
Jens Harlander, Stephan Rosebrock
A {\em word labeled oriented graph} (WLOG) is an oriented graph on vertices , where each oriented edge is labeled by a word in . WLOGs gi…