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math.AT2024

The mod p cohomology of the Morava stabilizer group at large primes

Mohammad Behzad Kang, Andrew Salch

We calculate the cohomology of the extended Morava stabilizer group of height , with trivial mod coefficients, for all heights and all primes . The result is an ex…

math.AT2024

Iwasawa invariants of finite spectra

Austin Maison, Andrew Salch

We calculate the classical Iwasawa invariants of the Iwasawa modules associated to the -adic topological -theory of finite spectra. We show that the graded average of the ord…

math.AT2023

Ravenel's May spectral sequence collapses immediately at large primes

A. Salch

At large primes, the height Ravenel-May spectral sequence takes as input the cohomology of a certain solvable Lie -algebra, and produces as output the mod coh…

math.AT2023

ell-adic topological Jacquet-Langlands duality

Andrew Salch, Matthias Strauch

We embed the Lubin-Tate tower into a larger tower of formal schemes, the "degenerating Lubin-Tate tower." We construct a topological realization of the degenerating Lubin-Tate towe…

math.AT2023

KU-local zeta-functions of finite CW-complexes

A. Salch

Begin with the Hasse-Weil zeta-function of a smooth projective variety over the rational numbers. Replace the variety with a finite CW-complex, replace etale cohomology with comple…

math.AT2015

Failure of flat descent of model structures on module categories

Andrew Salch

We prove that the collection of model structures on (quasicoherent) module categories does not obey flat descent. In particular, it fails to be a separated presheaf, in the fppf to…