The Brown-Peterson spectrum is not $E_{2(p^2+2)}$ at odd primes

Andrew Senger

Published 2017-10-26Version 1

Recently, Lawson has shown that the 2-primary Brown-Peterson spectrum does not admit the structure of an $E_{12}$ ring spectrum, thus answering a question of May in the negative. We extend Lawson's result to odd primes by proving that the p-primary Brown-Peterson spectrum does not admit the structure of an $E_{2(p^2+2)}$ ring spectrum. We also show that there can be no map $MU \to BP$ of $E_{2p+3}$ ring spectra at any prime.