A short introduction to the algebra, geometry, number theory and physics of moonshine.- Modified elliptic genus.- Superconformal indices and instanton partition functions.- On spinorial representations of involutory subalgebras of Kac-Moody algebras.- BPS spectra and invariants for three- and four-manifolds.- Introduction to the theory of elliptic hypergeometric integrals.- Feynman integrals and mirror symmetry.- Theory and applications of the elliptic Painlevй equation.
