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Generalized Thom spectra and their topological Hochschild homology. (English) Zbl 1430.19006
Let $$\mathbf{R}$$ be a structure ring spectrum, this has an underlying grouplike monoid of units $$\mathrm{GL}_{1}(\mathbf{R})$$. Let $$X$$ be a space, this spectrum represents the functor that assigns to $$X$$ the units in the $$\mathbf{R}$$-cohomology classes $$\mathbf{R}^{0}(X)$$. Next, given a map $$X\to \mathrm{BGL}{1}(\mathbf{R})$$, this has associated an $$\mathbf{R}$$-module Thom spectrum $$M(f)$$. The authors develop an analogous machinery in the setup of diagram spectra. An important feature is the multiplicative properties of their construction. As applications, they show several examples where known spectra arise a Thom spectrum of some map, for example: Theorem. Let $$\mathbf{R}$$ be a symmetric ring spectrum where all of its homotopy groups are concentrated in even degrees. Let $$u_{1},\ldots , u_{n}$$ be a sequence of homotopy classes with $$u_{i}\in \pi_{2i} (\mathbf{R})$$. Then, there is a loop map $$f_{(u_{1},\ldots , u_{n})}:SU(n+1)\to BG_{hI}$$ such that the homotopy type of the $$\mathbf{R}$$-module underlying the associated $$\mathbf{R}$$-algebra Thom spectrum $$T(f_{(u_{1},\ldots ,u_{n})})$$ is determined by a stable equivalence $$T(f_{(u_{1},\ldots ,u_{n})})\sim R/(u_{1},\ldots ,u_{n})$$. The Authors show how to interpret the topological Hochschild homology of Thom spectra in this setup.

##### MSC:
 19D55 $$K$$-theory and homology; cyclic homology and cohomology 55P43 Spectra with additional structure ($$E_\infty$$, $$A_\infty$$, ring spectra, etc.) 55N20 Generalized (extraordinary) homology and cohomology theories in algebraic topology 55P42 Stable homotopy theory, spectra 55P48 Loop space machines and operads in algebraic topology
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