Let me first ask an intuitive version of the question:

Let $Sp$ be the homotopy category of spectra. Let $E$ be a ring spectrum. Let $$D:Sp \to Sp$$ be the Spanier-Whitehead dual functor (maybe we need to restrict ourselves to compact object and that's fine). I want to define an algebraic Spanier-Whitehead duality functor $$ D_E: E_*E\text{-}coMod \to E_*E\text{-}coMod $$ such that it commutes with the $E$-hurewicz map $h_E$, i.e. $$ h_E \circ D = D_E \circ h_E $$.

The question under what conditions on $E$ there exists $D_E$? For example, when $E = H\mathbb{F}_p$ we know that $D_E = Hom_{\mathbb{F}_p}(M, \mathbb{F}_p)$.

Now let me make this question a little more precise. Maybe we need to replace $E_*E\text{-}coMod$ with finite objects in its derived category.

My gut feeling says, that if $E$ satisfies

  1. Flatness: $E_*E$ is flat over $E_*$,
  2. Adams Condition: Check out Definition 3.1, pg 16 of https://sites.math.northwestern.edu/~pgoerss/papers/sum.pdf

then it might just be enough to construct $D_E$. Is it though? If so can someone sketch a proof? If not do I need additional conditions?

So now the question is how to define dual objects in the (derived) category of $E_*E$ comodule and under what conditions on $E$ is it compatible with the Hurewicz map.

  • $\begingroup$ A minor remark - if $DE$ itself makes sense (e. g. for finite $E$), then, I believe, the function spectrum $\mathscr F(-,DE)$ would work $\endgroup$ – მამუკა ჯიბლაძე Mar 2 at 17:37
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    $\begingroup$ I want $D_E$ to be defined in the algebraic world (on `compact' objects). I should be able to define $D_E$ even for those $E_*E$ comodule $M$ which may not be $E$ homology of some spectrum. $\endgroup$ – Prasit Mar 2 at 19:14

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