For the first time, physicists in Italy have created a 'lump soliton': an extremely stable packet of light waves which can travel through 3D space, and even interact with other solitons without losing ...

Hamiltonian systems form the bedrock for modelling a vast range of physical phenomena, from celestial mechanics to quantum dynamics. Their evolution is governed by a Hamiltonian function that ...

We use foliations and connections on principal Lie groupoid bundles to prove various integrability results for Lie algebroids. In particular, we show, under quite general assumptions, that the ...