On excess filtration on the Steenrod algebra
نویسندگان
چکیده
The theory of unstable modules over the Steenrod algebra has been developed by many researchers and has various geometric applications. (See Schwartz [6] and its references.) It was so successful that it might be interesting to consider the structure of the Steenrod algebra which enable us to define the notion of unstable modules. Let us call the filtration on the Steenrod algebra defined from the excess of admissible monomials the excess filtration. (See 1.7 below.) We note that this filtration plays an essential role in developing the theory of unstable modules.
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