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Infinitesimal thickenings of Morava K-theories

Samuel Wuethrich
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Abstract

A. Baker has constructed certain sequences of cohomology theories which interpolate between the Johnson-Wilson and the Morava K-theories. We realize the representing sequences of spectra as sequences of MU-algebras. Starting with the fact that the spectra representing the Johnson-Wilson and the Morava K-theories admit such structures, we construct the sequences by inductively forming singular extensions. Our methods apply to other pairs of MU-algebras as well.

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Samuel Wuethrich. 2008-03-06. Infinitesimal thickenings of Morava K-theories. https://arxiv.org/abs/math/0607110

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