1993 algebraictopology bifurcationtheory calculusofvariations cellaggregation chemistry clebsch-gordancoefficients commutativerings criticalpointtheory criticalpointtheory(mathematicalanalysis) etc exercises functionalequations globalanalysis(mathematics) mathematicalphysics mathematics maximaandminima physicalandtheoretical physics problems quantumchemistry quantumtheory racahcoefficients representationsofgroups singularities(mathematics) symmetry(physics) tables wreathproducts(grouptheory)