First edition. Basile Demtchenko (1888-1936) was a Ukrainian-French mathematician and physicist, Doctor of Science, specializing in hydrodynamics. His work Problèmes Mixtes Harmoniques en Hydrodynamique des Fluides Parfaits (Mixed Harmonic Problems in Hydrodynamics of Perfect Fluids), published under the auspices of the Institute of Fluid Mechanics of the University of Paris, is an important contribution to the theory of incompressible and irrotational fluids. The study of mixed harmonic problems is fundamental for solving fluid dynamics questions, particularly in aerodynamics and hydraulics.
Presentation copy to Georges Louis Bouligand (1889-1979).