510 532 analyticspaces bifurcationtheory braidtheory catastrophes(mathematics) congresses curves differentiabledynamicalsystems differentiablemappings differential differentialequations elliptic fluidmechanics functionalequations geometry hydrodynamics invariants isomorphisms(mathematics) knottheory linear linktheory magnetohydrodynamics manifolds(mathematics) mathematicalphysics mathematics maximaandminima numericalsolutions physics plane singulariteiten symmetrygroups