La Classification Mathématique par matières 2000 Mathematics subject Classification 2000 Query : CC = 55Q91 19-XX $K$-theory [See also 16E20, 18F25] 19L47 Equivariant K-theory [See also 55N91, 55P91, 55Q91, 55R91, 55S91] 55-XX Algebraic topology 55Q91 Equivariant homotopy groups [See also 19L47] Keyword : Back to the Mathematics Subject Classification (version 2000)