A Treatise on the Calculus of Variations (Classic Reprint)

Thirty years have now elapsed since the appearance of .the treatise on the Calculus of Variations by Prof. Jellett, which, although it had been preceded by the smaller work of Woodhouse in 1810, and of A bbatt in 1837, is justly deemed the only complete treatise which has ever appeared in Engjlish. But all the works named have long since been out of print, and are now so rare as not to be found in the majority of the college libraries of the United States. Moreover, even Prof. Jellett streatise can no longer be regarded as complete, since its author had not read the memoirs of Samis and Cauchy relative to multiple integrals, while the contributions of Hesse, Moigno and Lindelof, and Todhunter were subsequent to the publication of his work. It should be added, also, that all the memoirs and contributions just named are contained in works which are likewise out of print, and are now almost as difficult of access to the general reader as is that of Prof. Jellett. These considerations first led the author to undertake the preparation of the present treatise, in which he has endeavored to present, in as simple a manner as he could command, everything of importance which is at present known concerning this abstruse department of analysis.
(Typographical errors above are due to OCR software and don't occur in the book.)

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