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2013 Admissible Monomials and Generating Sets for the Polynomial Algebra as a Module Over the Steenrod Algebra
M. F. Mothebe
Afr. Diaspora J. Math. (N.S.) 16(1): 18-27 (2013).

Abstract

For $n\geq 1,$ let $ \mathbf{P}(n) = \mathbb{F}_2[x_1,\ldots,x_n]$ be the polynomial algebra in $n$ variables $x_i,$ of degree one, over the field $\mathbb{F}_2$ of two elements. The mod2 Steenrod algebra ${\cal A}$ acts on $\mathbf{P}(n)$ according to well known rules. Let ${\cal A}^+\mathbf{P}(n)$ denote the image of the action of the positively graded part of ${\cal A}.$ A major problem is that of determining a basis for the quotient vector space $\mathbf{Q}(n) = \mathbf{P}(n)/{\cal A}^+\mathbf{P}(n).$ Both ${\mathbf{P} }(n) = \oplus_{d\geq0}\mathbf{P}^{d}(n)$ and $\mathbf{Q}(n)$ are graded where $\mathbf{P}^{d}(n)$ denotes the set of homogeneous polynomials of degree $d.$ In this paper we show that if $n \geq 2,$ and $d \geq 1$ can be expressed in the form $d = \sum_{i=1}^{n1} (2^{\lambda_i}1)$ with ${\lambda_1}> {\lambda_2} > \ldots >{\lambda_{n2}} \geq {\lambda_{n1}}\geq 1,$ then $${\rm {dim}}(\mathbf{Q}^{d}(n)) \geq \left (\sum_{q=1}^{{\rm min}\{ {\lambda}_{n1},n\}} {{n}\choose {q}}\right ) ({\rm {dim}}(\mathbf{Q}^{d'}(n1)) )$$ where $ d'= \sum_{i=1}^{n1} (2^{\lambda_i \lambda_{n1}}1).$

Citation

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M. F. Mothebe. "Admissible Monomials and Generating Sets for the Polynomial Algebra as a Module Over the Steenrod Algebra." Afr. Diaspora J. Math. (N.S.) 16 (1) 18 - 27, 2013.

Information

Published: 2013
First available in Project Euclid: 12 August 2013

zbMATH: 1278.05252
MathSciNet: MR3091712

Subjects:
Primary: 05E99 , 55S10

Keywords: Hit problem , Polynomial algebra , Steenrod squares

Rights: Copyright © 2013 Mathematical Research Publishers

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Vol.16 • No. 1 • 2013
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