New posts in Ring Spectra

Ring structures on algebraic K-theory spectrum, and its non-connective counterpart

What is the symmetric monoidal structure on the $(\infty,1)$-category of spectra?

Connective spectra and infinite loop spaces

Has anyone seen a nice map of multiplicative cohomology theories?

Morphisms of $\mathbb E_l$-rings between $\mathbb E_k$-rings for $l<k$