Salekhov, G. S. On Cauchy’s problem for linear partial differential equations in the domain of infinitely differentiable functions. (Russian) Zbl 1446.35002 Usp. Mat. Nauk 2, No. 2(18), 226-228 (1947). MSC: 35-02 Research exposition (monographs, survey articles) pertaining to partial differential equations 35B65 Smoothness and regularity of solutions to PDEs 35F05 Linear first-order PDEs 35G05 Linear higher-order PDEs PDFBibTeX XMLCite \textit{G. S. Salekhov}, Usp. Mat. Nauk 2, No. 2(18), 226--228 (1947; Zbl 1446.35002)