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Homotopy groups are tools used in [[algebraic topology]] to classify [[topological space]]s. The different ways to map an ''n-sphere'' continuously into a given topological space are divided into equivalence classes, called '''homotopy classes'''.
Homotopy groups are tools used in [[algebraic topology]] to classify [[topological space]]s. The different ways to map an '''n-sphere''' continuously into a given topological space are divided into equivalence classes, called '''homotopy classes'''.