Abstract
We give a simple combinatorial model for plethysm. Precisely, the bialgebra dual to plethystic substitution is realized as the homotopy cardinality of the incidence bialgebra of an explicit simplicial groupoid, obtained from surjections by a construction reminiscent of the Waldhausen and the Quillen –construction.
Citation
Alex Cebrian. "A simplicial groupoid for plethysm." Algebr. Geom. Topol. 21 (1) 421 - 445, 2021. https://doi.org/10.2140/agt.2021.21.421
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