Symplectic $G$-capacities and integrable systems

Abstract

For any Lie group $G$, we construct a $G$-equivariant analogue of symplectic capacities and give examples when $G={\mathbb{T}}^k\times {\mathbb{R}}^{d-k}$, in which case the capacity is an invariant of integrable systems. Then we study the continuity of these capacities, using the natural topologies on the symplectic $G$-categories on which they are defined.

arXiv comment33 pages, 11 figures