I will explain how to embed Right Angled Artin Groups (RAAGs) in Ham(S), the groups of Hamiltonian symplectomorphisms of surfaces S.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] https://www.mpim-bonn.mpg.de/node/3444
[3] https://www.mpim-bonn.mpg.de/node/249