arXiv subjects
Publications and source records attributed to Dang Ho Hai Nguyen.
This note shows that the $n$-th homology suspension is surjective for certain quotients of finite $((Z/2)^n$-CW.complexes. This is true as soon as the equivariant $((Z/2)^n$-cohomology are quotients is a free $H^*$((Z/2)^n$-module. An application is given to certain Brown-Gitler spectrum.
In the 1980's, the magic properties of the cohomology of elementary abelian groups as modules over the Steenrod algebra initiated a long lasting interaction between topology and modular representation theory in natural characteristic. The Adams-Gunawardena-Miller theorem in particular, showed that their decomposition is governed by the modular representations of the semi-groups of square matrices. Applying Lannes' T functor on the summands L P := Hom Mn(Fp) (P, H * (F p) n) defines an intriguing construction in representation theory. We show that T(L P) $\sim$ = L P $\oplus$ H * V 1 $\otimes$ L $δ$(P) , defining a functor $δ$ from F p [M n (F p)]-projectives to F p [M n--1 (F p)]-projectives. We relate this new functor $δ$ to classical constructions in the representation theory of the general linear groups.
This note gives a new construction of Takayasu's cofibrations.
One constructs minimal injective resolutions for certain unstable modules that appears to be the mod 2 cohomology of Thom spectra. The terms of the resolution are tensor products of Brown-Gitler modules and Steinberg modules introduced by S. Mitchell and S. Priddy. A combinatorial result of Andrews shows that the alternating sum of the Poincare series of the considered modules is zero. One gives homotopical applications of this result.