An algebraic ZIP proof of the classification | Algebraic Topology | NJ Wildberger

[@kabayakawa]

It is refreshing the intuitive develop of this ltopic

[@clapacademyarmandnoel6691]

It's really nice how Conway took the confinement of the old planar technique and elevated his method into a dimension higher by using spheres, where the added room provides more flexibility.

[@dehnsurgeon]

Just to clarify, is (aa)(bb)(cc)(dd) the same surface as (aba^(-1) c)(d)+(bcd^(-1) ) up to a relabelling of the edges. I.e. does (aba^(-1) c)(d)+(bcd^(-1) ) = (aa)(bb)(cc)(dd) by simplifying.