Geodesic
Upper Triangular Invariants
Canadian mathematical bulletin, Tome 28 (1985) no. 2, pp. 243-248

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DOI

We modify the construction of the mod 2 Dyer-Lashof (co)-algebra to obtain a (co)-algebra W which is (also) unstable over the Steenrod algebra A*. W has canonical sub-coalgebras W[k] such that the hom-dual W[k:]* is isomorphic as an A-algebra to the ring of upper triangular invariants in Z/2Z [x1, . . . , xk].
DOI : 10.4153/CMB-1985-030-2
Mots-clés : 55S12 
Upper Triangular Invariants. Canadian mathematical bulletin, Tome 28 (1985) no. 2, pp. 243-248. doi: 10.4153/CMB-1985-030-2
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     year = {1985},
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     number = {2},
     doi = {10.4153/CMB-1985-030-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1985-030-2/}
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