NASA technical note TN (series). D-5789. Theory of separation of variables for linear partial differential equations of second order in two independent variables [with list of references]; by Marvin E. Goldtein.
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Theory of separation of variables for linear partial differential equations of second order in two independent variables [with list of references]; by Marvin E. Goldtein.
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NASA technical note TN (series). D-5789. Theory of separation of variables for linear partial differential equations of second order in two independent variables [with list of references]; by Marvin E. Goldtein.