algebraictopology arithmeticalalgebraicgeometry characteristicclasses combinatorialanalysis congresses differentialequations differentialforms gaugefields(physics) grouptheory holomorphicfunctions homotopytheory k-theory loopspaces low-dimensionaltopology mappings(mathematics) modulitheory quantumtheory symplecticgeometry symplecticmanifolds topologicalspaces vonneumannalgebras