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Moduli Spaces of Commutative Ring Spectra
, 2003
"... Let E be a homotopy commutative ring spectrum, and suppose the ring of cooperations E#E is flat over E# . We wish to address the following question: given a commutative E# algebra A in E#Ecomodules, is there an E# ring spectrum X with E#X = A as comodule algebras? We will formulate this as ..."
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Cited by 17 (0 self)
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Let E be a homotopy commutative ring spectrum, and suppose the ring of cooperations E#E is flat over E# . We wish to address the following question: given a commutative E# algebra A in E#Ecomodules, is there an E# ring spectrum X with E#X = A as comodule algebras? We will formulate this as a moduli problem, and give a way  suggested by work of Dwyer, Kan, and Stover  of dissecting the resulting moduli space as a tower with layers governed by appropriate AndreQuillen cohomology groups. A special case is A = E#E itself. The final section applies this to discuss the LubinTate or Morava spectra En .
Moduli problems for structured ring spectra
 DANIEL DUGGER AND BROOKE
, 2005
"... In this document we make good on all the assertions we made in the previous paper “Moduli spaces of commutative ring spectra ” [20] wherein we laid out a theory a moduli spaces and problems for the existence and uniqueness of E∞ring spectra. In that paper, we discussed the the HopkinsMiller theore ..."
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Cited by 10 (0 self)
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In this document we make good on all the assertions we made in the previous paper “Moduli spaces of commutative ring spectra ” [20] wherein we laid out a theory a moduli spaces and problems for the existence and uniqueness of E∞ring spectra. In that paper, we discussed the the HopkinsMiller theorem on the LubinTate or Morava spectra En; in particular, we showed how to prove that the moduli space of all E ∞ ring spectra X so that (En)∗X ∼ = (En)∗En as commutative (En) ∗ algebras had the homotopy type of BG, where G was an appropriate variant of the Morava stabilizer group. This is but one point of view on these results, and the reader should also consult [3], [38], and [41], among others. A point worth reiterating is that the moduli problems here begin with algebra: we have a homology theory E ∗ and a commutative ring A in E∗E comodules and we wish to discuss the homotopy type of the space T M(A) of all E∞ring spectra so that E∗X ∼ = A. We do not, a priori, assume that T M(A) is nonempty, or even that there is a spectrum X so that E∗X ∼ = A as comodules.
Realizing Commutative Ring Spectra as E∞ Ring Spectra
, 1999
"... We outline an obstruction theory for deciding when a homotopy commutative and associative ring spectrum is actually an E∞ ring spectrum. The obstruction groups are AndréQuillen cohomology groups of an algebra over an E∞ operad. The same cohomology theory is part of a spectral sequence for comput ..."
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Cited by 7 (2 self)
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We outline an obstruction theory for deciding when a homotopy commutative and associative ring spectrum is actually an E∞ ring spectrum. The obstruction groups are AndréQuillen cohomology groups of an algebra over an E∞ operad. The same cohomology theory is part of a spectral sequence for computing the homotopy type of mapping spaces between E∞ ring spectrum. The obstruction theory arises out of techniques of Dwyer, Kan, and Stover, and the main application here is to prove an analog of a theorem of Haynes Miller and the second author: the LubinTate spectra En are E∞ and the space of E∞ selfmaps has weakly contractible components.
Simplicial Structured Ring Spectra
, 1999
"... We examine the foundations of simplicial algebras in spectra over a simplicial operad. We are led to simplicial operads and simplicial algebras over simplicial operads because certain operads which are notoriously hard to work with { mainly the E1 operad { can be simplicially resolved by simpler pie ..."
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Cited by 1 (1 self)
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We examine the foundations of simplicial algebras in spectra over a simplicial operad. We are led to simplicial operads and simplicial algebras over simplicial operads because certain operads which are notoriously hard to work with { mainly the E1 operad { can be simplicially resolved by simpler pieces. Our main goals are to a build spectral sequence for computing spaces of maps between structured ring spectra, and to develop a DwyerKanStover style obstruction theory for deciding when a spectrum actually can be a structured ring spectrum. In this paper we work out some of the foundations of the homotopy theory of simplicial ring spectra over a simplicial operad. This is not a gratuitous act of generalization. Simplicial objects in any category are a standard mechanism for building the resolutions necessary for computations; this is how simplicial spectra arise. The simplicial operads arise as an answer to an immediate practical problem. If T is an E1 operad over the linear isometrie...
Representability theorems for presheaves of spectra
, 2010
"... The Brown representability theorem gives a list of conditions for the representablity of a setvalued contravariant functor which is defined on the classical stable homotopy category. It has had many uses through the years, and has ..."
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The Brown representability theorem gives a list of conditions for the representablity of a setvalued contravariant functor which is defined on the classical stable homotopy category. It has had many uses through the years, and has
The Realization Space of a Πalgebra: A Moduli Problem in Algebraic Topology
, 2001
"... The homotopy theory of topological spaces is often studied by appealing to algebraic data  cohomology, for example, or homotopy groups. This leads to a general realization problem: when can a specified object in algebra be realized by a space and, if so, how uniquely? We describe a very general me ..."
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The homotopy theory of topological spaces is often studied by appealing to algebraic data  cohomology, for example, or homotopy groups. This leads to a general realization problem: when can a specified object in algebra be realized by a space and, if so, how uniquely? We describe a very general method for addressing this problem, using as input a type of AndreQuillen cohomology. In this paper we concentrate on the realization problem for homotopy groups.
GENERALIZED BROWN REPRESETABILITY IN HOMOTOPY CATEGORIES
, 2005
"... Abstract. Brown representability approximates the homotopy ..."
GENERALIZED BROWN REPRESENTABILITY IN HOMOTOPY CATEGORIES
, 2008
"... Abstract. Brown representability approximates the homotopy ..."
ON THE COFIBRANT GENERATION OF MODEL CATEGORIES
, 907
"... Abstract. The paper studies the problem of the cofibrant generation ..."