abstractharmonicanalysis boundaryelementmethods choquettheory congresses delaydifferentialequations dirichletprinciple distribution(probabilitytheory) economics fractals functionalanalysis functionsofcomplexvariables gametheory geophysics harmonicanalysis harmonicfunctions history integralequations markovprocesses mathematicalanalysis mathematics measuretheory operatortheory potentialtheory probabilitytheoryandstochasticprocesses qa322 semigroups statisticalmechanics statisticalphysics technique thermodynamics