58j5358j5058j5165n2535p1511f7253c2034l1534e0557r18 analysisonmanifolds asymptoticexpansions asymptotictheory boundaryvalueproblems congresses differentialgeometry differentialtopology discontinuousgroupsandautomorphicforms eigenvalues estimationofeigenvalues globalanalysis globaldifferentialgeometry globalriemanniangeometry includingpinching isospectrality manifoldsandcellcomplexes numbertheory numericalanalysis ordinarydifferentialequations ordinarydifferentialoperators partialdifferentialequations partialdifferentialequationsonmanifolds;differentialoperators relationsbetweenspectraltheoryandergodictheory spectralgeometry spectralproblems;spectralgeometry;scatteringtheory spectraltheory;selbergtraceformula spectraltheoryandeigenvalueproblems topologyandgeometryoforbifolds upperandlowerbounds