Commutative ring spectrum
COMMUTATIVE MONOID IN A GOOD CATEGORY OF SPECTRA; ROUGHLY EQUIVALENT TO AN E∞-RING SPECTRUM
Commutative ring spectra; Good category of commutative ring spectra
In the mathematical field of algebraic topology, a commutative ring spectrum, roughly equivalent to a E_\infty-ring spectrum, is a commutative monoid in a goodsymmetric monoidal with respect to smash product and perhaps some other conditions; one choice is the category of symmetric spectra category of spectra.