[[!redirects Hepworth_6]] ###Reference Detailes### +-- cite key : Hepworth_6 title : Groups, cacti and framed little discs author : Hepworth, R. eprint : <http://arxiv.org/abs/1009.3260v1> mrclass : math.AT note : arXiv:1009.3260v1; 40 pages url : <http://arxiv.org/abs/1009.3260v1> arxiv : [1009.3260](http://www.arxiv.org/abs/1009.3260) refbase : [1785](http://www.math.ntnu.no/~stacey/RefBase/show.php?record=1785) =-- {: .bibliography} --- ### Bookmark Operads and loop spaces category: string topology