On some functional transformations relative to linear PDEs of second order
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13 pages, LaTex, forward and translations by H.C. Rosu who is indebted to J. Beckers for kindly sending copy of the work, idioms: original French, English, Romanian, Spanish
13 pages, LaTex, forward and translations by H.C. Rosu who is indebted to J. Beckers for kindly sending copy of the work, idioms: original French, English, Romanian, Spanish