By Jens Harlander and Stephan Rosebrock

A 2-complex *K* has collapsing non-positive immersion if for every combinatorial immersion *X\to K*, where *X* is finite, connected and does not allow collapses, either *\chi(X)\le 0* or *X* is point. This concept is due to Wise who also showed that this property implies local indicability of the fundamental group... Show more

January 14, 2023

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Relative Non-Positive Immersion

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