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    • Symmetric Homotopy Theory for Operads and Weak Lie 3-Algebras 

      Dehling, Malte (2021-01-14)
      This thesis consists of two parts: In the first, we develop the homotopy theory of differential graded operads over any unital commutative ring. The main idea is to consider the symmetric group actions as part of the ...
    • Higher Groupoid Actions, Bibundles, and Differentiation 

      Li, Du (2014-08-13)
      In this thesis, we employ simplicial methods to study actions, principal bundles and bibundles of higher groupoids. Roughly, we use Kan fibrations to model actions of higher groupoids; we use pairs of a Kan fibration ...