Invariant theory and the lambda algebra

Author:
William M. Singer

Journal:
Trans. Amer. Math. Soc. **280** (1983), 673-693

MSC:
Primary 55Q45; Secondary 55S10, 55T15, 55U10

DOI:
https://doi.org/10.1090/S0002-9947-1983-0716844-7

MathSciNet review:
716844

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Abstract: Let be the Steenrod algebra over the field . In this paper we construct for any left -module a chain complex whose homology groups are isomorphic to the groups . This chain complex in homological degree is built from a ring of invariants associated with the action of the linear group on a certain algebra of Laurent series. Thus, the homology of the Steenrod algebra (and so the Adams spectral sequence for spheres) is seen to have a close relationship to invariant theory. A key observation in our work is that the Adem relations can be described in terms of the invariant theory of . Our chain complex is not new: it turns out to be isomorphic to the one constructed by Kan and his coworkers from the dual of the lambda algebra. Thus, one effect of our work is to give an invariant-theoretic interpretation of the lambda algebra. As a consequence we find that the dual of lambda supports an action of the Steenrod algebra that commutes with the differential. The differential itself appears as a kind of "residue map". We are also able to describe the coalgebra structure of the dual of lambda using our invariant-theoretic language.

**[1]**A. K. Bousfield, E. B. Curtis, D. M. Kan, D. G. Quillen, D. L. Rector, and J. W. Schlesinger,*The 𝑚𝑜𝑑-𝑝 lower central series and the Adams spectral sequence*, Topology**5**(1966), 331–342. MR**0199862**, https://doi.org/10.1016/0040-9383(66)90024-3**[2]**A. K. Bousfield and E. B. Curtis,*A spectral sequence for the homotopy of nice spaces*, Trans. Amer. Math. Soc.**151**(1970), 457–479. MR**0267586**, https://doi.org/10.1090/S0002-9947-1970-0267586-7**[3]**Leonard Eugene Dickson,*A fundamental system of invariants of the general modular linear group with a solution of the form problem*, Trans. Amer. Math. Soc.**12**(1911), no. 1, 75–98. MR**1500882**, https://doi.org/10.1090/S0002-9947-1911-1500882-4**[4]**Leif Kristensen,*On a Cartan formula for secondary cohomology operations*, Math. Scand.**16**(1965), 97–115. MR**0196740**, https://doi.org/10.7146/math.scand.a-10751**[5]**Ib Madsen,*On the action of the Dyer-Lashof algebra in 𝐻_{∗}(𝐺)*, Pacific J. Math.**60**(1975), no. 1, 235–275. MR**0388392****[6]**John W. Milnor and John C. Moore,*On the structure of Hopf algebras*, Ann. of Math. (2)**81**(1965), 211–264. MR**0174052**, https://doi.org/10.2307/1970615**[7]**Huá»³nh Mui,*Modular invariant theory and cohomology algebras of symmetric groups*, J. Fac. Sci. Univ. Tokyo Sect. IA Math.**22**(1975), no. 3, 319–369. MR**0422451****[8]**William M. Singer,*A new chain complex for the homology of the Steenrod algebra*, Math. Proc. Cambridge Philos. Soc.**90**(1981), no. 2, 279–292. MR**620738**, https://doi.org/10.1017/S0305004100058746**[9]**William M. Singer,*Iterated loop functors and the homology of the Steenrod algebra. II. A chain complex for Ω^{𝑘}_{𝑠}𝑀*, J. Pure Appl. Algebra**16**(1980), no. 1, 85–97. MR**549706**, https://doi.org/10.1016/0022-4049(80)90044-4**[10]**William M. Singer,*The construction of certain algebras over the Steenrod algebra*, J. Pure Appl. Algebra**11**(1977/78), no. 1-3, 53–59. MR**0467746**, https://doi.org/10.1016/0022-4049(77)90039-1**[11]**Clarence Wilkerson,*Classifying spaces, Steenrod operations and algebraic closure*, Topology**16**(1977), no. 3, 227–237. MR**0442932**, https://doi.org/10.1016/0040-9383(77)90003-9

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Additional Information

DOI:
https://doi.org/10.1090/S0002-9947-1983-0716844-7

Keywords:
Adams spectral sequence,
homotopy groups of spheres,
lower central series,
lambda algebra,
cohomology of the Steenrod algebra

Article copyright:
© Copyright 1983
American Mathematical Society