2 papers
math.AT2002
Infinite loop space structure(s) on the stable mapping class group
Nathalie Wahl
Tillmann introduced two infinite loop space structures on the plus construction of the classifying space of the stable mapping class group, each with different computational advant…
math.AT2001
Framed discs operads and the equivariant recognition principle
Paolo Salvatore, Nathalie Wahl
The framed n-discs operad fD_n is studied as semidirect product of SO(n) and the little n-discs operad. Our equivariant recognition principle says that a grouplike space acted on b…