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Steenrod algebra
(redirected from Steenrod square)

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Steenrod algebra [′sten‚räd ′al·jə·brə]
(mathematics)
The cohomology groups of a topological space have additive operations on them, which can be added and multiplied so as to form the Steenrod algebra.
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Among the topics discussed by the research articles are symplectic Heegaard splittings and linked abelian groups, differential characters and the Steenrod squares, relative weight filtrations on completions of mapping class groups, symplectic automorphism groups of nilpotent quotient of fundamental groups of surfaces, and new examples of elements in the kernel of the Magnus representation of the Torelli groups.
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