Title: Motivic modular forms from equivariant stable homotopy theory,
Abstract: In this paper, we produce a cellular motivic spectrum of motivic modular
forms over $\R$ and $\C$, answering positively to a conjecture of Dan Isaksen.
This spectrum is constructed to have the appropriate cohomology, as a module
over the relevant motivic Steenrod algebra. We first produce a $\G$-equivariant
version of this spectrum, and then use a machinery to construct a motivic
spectrum from an equivariant one. We believe that this machinery will be of
independent interest.