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Surojit Ghosh's user avatar
Surojit Ghosh's user avatar
Surojit Ghosh's user avatar
Surojit Ghosh
  • Member for 10 years, 11 months
  • Last seen this week
  • Haifa, Israel
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Dold-Kan correspondence in the category of symmetric spectra
One thing I am thinking that we know we have a map $Sp \to Ho(Sp)$. Since $Ho(Sp)$ is an additive category so we can add maps. Therefore, we can take the alternative sum of face maps in $Ho(Sp)$ then take a representative in $Sp$ and define that as the differential. Now if we have a cosimplicial object $W^\bullet$ in $Sp$. Here each $W^n$ is an $E$-module spectra. Then we have a map $W^n \to M^n W^\bullet$, the Matching object. Then can we claim that the kernel of the map $W^n \to M^n W^\bullet$ is a summand of $W^n?$ I think the kernel should be $\bigcap_{i=0}^{n-1} ker(s^i).$
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Dold-Kan correspondence in the category of symmetric spectra
Btw, I don't need a formal Dold-Kan equivalence: all I need is a procedure for producing a chain complex of spectra from a simplicial object in symmetric spectra.
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Dold-Kan correspondence in the category of symmetric spectra
For any pointed simplicial category we can define the chain compexes are those such that composition of consecutive differentials is nullhomotopic. We can do this for the category of symmetric spectra. With these notions in our hand can we say something about the normalized complex functor or the Moore complex functor from simplicial objects in symmetric spectra to the chain complexes in symmetric spectra?
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Dold-Kan correspondence in the category of symmetric spectra
@DylanWilson: Can you please give me a reference for " There is an equivalence between the homotopy theory of filtered objects and simplicial objects in spectra"?
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Dold-Kan correspondence in the category of symmetric spectra
@Dylan Wilson: Sorry for the unclear question. But I really mean that the category of simplicial objects in symmetric spectra not the EM- modules.
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Dold-Kan correspondence in the category of symmetric spectra
@DavidWhite: My precise question is: Is there any categorical equivalence or Quillen equivalence between the category of simplicial objects in symmetric spectra, $s(Sp^\Sigma)$, and category of chain complexes in $Sp^\Sigma$?
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Dold-Kan correspondence in the category of symmetric spectra
I am looking for quillen equivalence.
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A question related to bousfield localization and nilpotent completion
@Prasit: Thank you so much. Yeah, I know if a spectrum is smashing then that definitely sits inside the list. Using 10.6 and 10.9 of Ravenel's paper on "Localization of spectra with respect to certain periodic homology" it follows that E(n) is smashing. But do you know more examples?
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Künneth formula for Bredon cohomology theory
There is a natural map $f : S(\xi)_+ \wedge S^V \rightarrow S(\xi^j)_+ \wedge S^V$. Then for what $n$, $\tilde{H}^n_{Z/n}(f)$ is nonzero?Where $V$ is a representation of $Z/n$ and $f(z,v) = (z^j ,v) , z \in S(\xi) , v \in S^V$.
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Künneth formula for Bredon cohomology theory
:What can you say about the convergence when $X$-is $S(\xi)$? Where $\xi$ is the irreducible representation of $Z/n$ given by multiplication by $e^{2i \pi /n}$
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Künneth formula for Bredon cohomology theory
@SteveCostenoble: Can you please give a proof or reference for RO(G)-graded and Z-graded Kunneth formula with the Burnside ring Mackey functor?
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Künneth formula for Bredon cohomology theory
@SteveCostenoble : Thank you for your valuable comments. But it'll be great if you can produce some formula of Kunneth type for constant coefficient sysmtem.
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