Cantero Morán, FedericoGutiérrez Marín, Javier J.Esquirol Esteve, Josep2020-05-062020-05-062019-09-11https://hdl.handle.net/2445/158843Treballs finals del Màster en Matemàtica Avançada, Facultat de matemàtiques, Universitat de Barcelona, Any: 2019, Director: Federico Cantero Morán i Javier J. Gutiérrez Marín[en] The cup- $i$ products in semi-simplicial sets are developed following the work in $[1] .$ The category of signed simplicial sets is presented, and using the cup- $i$ product formulas, we find an operation in the cochain complex of a signed semisimplicial set that gives rise to the Steenrod squares. Explicit formulas are given to compute them.38 p.application/pdfengcc-by-sa (c) Esquirol Esteve, Josep, 2019http://creativecommons.org/licenses/by-sa/3.0/es/Topologia algebraicaTeoria de l'homotopiaTreballs de fi de màsterAlgebraic topologyHomotopy theoryMaster's thesesinfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccess