Descrizione

Bruxelles, F. Hayez, 1899. 8vo (24.7 x 16.1 cm). 8 pp. (including printed front wrapper). = Rare paper (offprint), by the Viennese mathematician Leopold Bernhard Gegenbauer (1849-1903) whose name and fame is substantiated by, e.g. the Gegenbauer functions, Gegenbauer transforms, Gegenbauer series, Fourier-Gegenbauer sums, Gauss-Gegenbauer quadrature, Gegenbauer's integral inequalities, Gegenbauer's partial differential operators, the Gegenbauer equation, Gegenbauer approximation, Gegenbauer weight functions, the Gegenbauer oscillator, and the Gegenbauer addition theorem published in 1875. In this work Gegenbauer expanded some functions first described by the German astronomer and mathematician Friedrich Wilhelm Bessel (1784-1846). A stamp on the front wrapper gives the publisher' s name and publication date (2 December). Front (wrapper) page somewhat soiled, an with a blue pencil annotation, otherwise a very good, clean copy. Rare.