$2$-categories 00-xx01-xx51-xx52-xx53-xx68-xx70-xx74-xx92-xx97-xx00a99 34cxx37cxx37dxx37exx37nxx70kxx 81t4581t4081t3081t0581t6070s0518d0518d5055n34 algebraictopology applications axiomaticquantumfieldtheory;operatoralgebras bicategoriesandgeneralizations biologyandothernaturalsciences branes) categorieswithstructure categorytheory;homologicalalgebra chaoticbehaviorinsystems classicalfieldtheories computerscience conformalfieldtheories congresses convexanddiscretegeometry differentiabledynamicalsystems differentialgeometry doublecategories dynamicalsystemsandergodictheory dynamicalsystemswithhyperbolicbehavior ellipticcohomology etc general generalandmiscellaneousspecifictopics geometry historyandbiography homologyandcohomologytheories lagrangianformalismandhamiltonianformalism low-dimensionaldynamicalsystems mathematics mathematicseducation mechanicsofdeformablesolids miscellaneoustopics nonlineardynamics nonlineartheories operads ordinarydifferentialequations origami origamiineducation qualitativetheory quantumfieldtheory quantumfieldtheory;relatedclassicalfieldtheories quantumtheory smoothdynamicalsystems:generaltheory stringmodels supersymmetricfieldtheories topologicalfields topologicalfieldtheories two-dimensionalfieldtheories