Volumes1and2containJordan'spapersonfinitegroups,Volume3containshispapersonlinearandmultilinearalgebraandonthetheoryofnumbers,whileVolume4containspapersonthetopologyofpolyhedra,differentialequations,andmechanics.
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Volumes 1 and 2 contain Jordan's papers on finite groups, Volume 3 contains his papers on linear and multilinear algebra and on the theory of numbers, while Volume 4 contains papers on the topology of polyhedra, differential equations, and mechanics.