Changes

===Strings, Surfaces, and Looping Around===

===Strings, Surfaces, and Looping Around===

:''For more information please see:'' [[Homotopy group]]

:''For more information please see:'' [[Fundamental group]] and [[Homotopy group]]

By strings and surfaces, we mean the possible ways of embedding <math>\mathbb{S}^1 \ </math> and <math>\mathbb{S}^2 \ </math> into other spaces.   

By strings and surfaces, we mean the possible ways of embedding <math>\mathbb{S}^1 \ </math> and <math>\mathbb{S}^2 \ </math> into other spaces.