### S-modules in the category of schemes, by Po Hu

This paper gives a theory of S-modules in the setting of A^1-stable
homotopy theory. The category of S-modules is a category of A^1-spectra
with a strictly associative, commutative, and unital smash product,
which allows the construction of spectra that are strict rings and
modules with respect to the smash product. I also give analogues of
the constructions from topology, such as twisted half-smash products
and the linear isometries operad.

Po Hu <pohu@math.uchicago.edu>