The Cohen-Lyndon property, coherence, and immersions

  • Tagungsort:

    Gebäude 20.30, SR 2.058

  • Datum:

    12.02.2026

  • Referent:

    Macarena Arenas (University of Cambridge)

  • Zeit:

    15:45 Uhr

  • Abstract: The Cohen-Lyndon property, introduced in the 60s, is a property of group presentations (equivalently, 2-complexes) that encodes a ``strong form’’ of asphericity. In this talk, we will introduce this property and explain how it relates to coherence, and to the study of immersions into 2-complexes. Based on joint work with Henry Wilton.