PlanetPhysics/Non Abelian Algebraic Topology 5

Non--Abelian algebraic topology
A relatively recent development in Algebraic Topology that began in 1960s which considers algebraic structures in dimensions greater than 1 which develop the non-Abelian character of the fundamental group of a topological space, or a novel approach to higher dimensional, non-Abelian algebraic treatments of topological invariants in Algebraic Topology.

Recent reference:
Ronald Brown, Bangor University, UK, Philip J. Higgins, Durham University, UK Rafael Sivera, University of Valencia, Spain.2010. Nonabelian Algebraic Topology: Filtered Spaces, \htmladdnormallink{crossed complexes {http://planetphysics.us/encyclopedia/SingularComplexOfASpace.html}, Cubical Homotopy groupoids.} EMS Tracts in Mathematics, Vol.15, an EMS publication: September 2010, approx. 670 pages. ISBN 978-3-03719-083-8.