Hopf algebras | Algebraic topology

Steenrod algebra

In algebraic topology, a Steenrod algebra was defined by Henri Cartan to be the algebra of stable cohomology operations for mod cohomology. For a given prime number , the Steenrod algebra is the graded Hopf algebra over the field of order , consisting of all stable cohomology operations for mod cohomology. It is generated by the Steenrod squares introduced by Norman Steenrod for , and by the Steenrod reduced th powers introduced in Steenrod and the Bockstein homomorphism for . The term "Steenrod algebra" is also sometimes used for the algebra of cohomology operations of a generalized cohomology theory. (Wikipedia).

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Related pages

Hopf algebra | Vector space | Finite field | Frobenius endomorphism | Gysin homomorphism | Complex projective plane | Algebra homomorphism | Algebraic topology | Bockstein homomorphism | Suspension (topology) | Cohomology | Ring spectrum | Stiefel–Whitney class | Natural transformation | Cup product | Eilenberg–Maclane spectrum | Dual space | Primitive element (co-algebra) | Ring (mathematics) | Cap product | Prime number | Symmetric algebra | Adams spectral sequence | Cohomology operation | Frank Adams | Complex projective space | Pontryagin cohomology operation | Contractible space | Dual Steenrod algebra