The sigma orientation is an H∞ map


In [AHS01] the authors constructed a natural map, called the sigma orientation, from the Thom spectrum M U 6 to any elliptic spectrum in the sense of [Hop95]. M U 6 is an H∞ ring spectrum, and in this paper we show that if (E, C, t) is the elliptic spectrum associated to the universal deformation of a supersingular elliptic curve over a perfect field of… (More)


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