‎Gisèle Fournier‎
‎Perturbations‎

‎Recherches sur la Theorie des Perturbations que les Comètes peuvent eprouver par L'Action des Planètes.‎

‎(Paris, Moutard, 1785). 4to. Extracted from ""Mémoires fe Mathematique et de Physique, Présentés à l'Academie des Sciences par divers Savans"", Tome X. Pp. 65-160. Wide-margined, clean and fine.‎

‎First appearance of this groundbreaking paper in which Lagrange presented his invention of the new method of solving differential equations as VARIATION OF PARAMETERS, and in which the method was completely developed for the first time. He applies the method to the determination of the orbit of a comet from three observations"" this formed the basis of subsequent recherches on the subject."" In the summer of 1779 Lagrange submitted ""Recherches sur la théorie des perturbations que les cométes peuvent éprouver par l’action des planétes"", which won the double prize of 4,000 livres. This was the last time that he participated in the competitions of the Paris Academy.""(DSB).""Lagrange, whose contributions to celestial mechanics were of the most brilliant characther, wrote his first memoir in 1766 on the perturbations of Jupiter and Saturn. In this work he developed still further the method of the variation of parameters, leaving his final equations still incorrect....their true form being that of the long period terms, as was shown by Laplace in 1784...The method of variatiobn of parameters was completely developed for the first time in 1782 by Lagrange in his prize memoir on the perturbations...(the paper offered).""‎

‎Mémoire sur la détermination des perturbations absolues ‎

‎Hansen Peter Andreas Mémoire sur la détermination des perturbations absolues dans les ellipses d'une excentricité et d'une inclinaison quelconque Traduit de l’allemand par V. Mauvais Paris , Bachelier , 1845 , in-8 (230x130)relié demi veau , pièce de titre , dos frotté, 167pp . ‎

‎Hansen P.A. , directeur de l’observatoire de Gotha , s’intéresse au problème de l’astronomie dynamique ,Une étude des perturbations mutuelles de Jupiter et de Saturne lui vaut le prix de l'académie de Berlin en 1830 et un mémoire sur les perturbations des trajectoires de comètes est récompensé par l'académie de Paris en 1850. ‎

‎Banasiak J., Arlotti L. Perturbations of Positive Seminars with Applications. ‎

‎Banasiak J., Arlotti L. Perturbations of Positive Seminars with Applications. In English /Banasiak J., Arlotti L. Perturbations of Positive Semigroups with Applications. London. Springer, 2006, 438p.We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available.SKUalb041dcb0a02b1550e.‎

‎Levitin E.S. Theory of perturbations in mathematical programming and its applic‎

‎Levitin E.S. Theory of perturbations in mathematical programming and its applications. In Russian /Levitin E.S. Teoriya vozmushcheniy v matematicheskom programmirovanii i ee prilozheniya. M. Science 1992. 360s. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalbe9a7a693ac4ab4cb.‎

‎Maslov V.P. Theory of perturbations and asymptotic methods. In Russian /Maslov ‎

‎Maslov V.P. Theory of perturbations and asymptotic methods. In Russian /Maslov V.P. Teoriya vozmushcheniy i asimptoticheskie metody. Moscow, Publishing House of Moscow University, 1965, 549 p. Solid Publishing House. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalb2b1b5648a59064f6.‎