‎HALEY Alex‎
‎Roots.‎

‎Algebraic Researches, containing a disquisition on Newton's Rule for the Discovery of Imaginary Roots, and an allied Rule applicable to a particular class of Equations, together with a complete invariantive determination of the character of the Roots ...‎

‎(London, Taylor and Francis, 1865). 4to. No wrappers as extracted from ""Philosophical Transactions"", Vol. 154 - Part III, pp. 579-666 and 2 lithographed plates. Some faint brownspots to theplates. Otherwise clean and fine.‎

‎First printing of a main paper of the founder (together with Cayley) of the theory of algebraic invariants, in which Sylvester investigates the roots of quintic equations and the proof of Newton's rule.""Another problem of great importence investigated in two long memoirs of 1853 and 1864 (the paper offered) concerns the nature of the roots of quintic equation. Sylvester took the functions of the coefficients that serve to decide the reality of the roots, and treated them as coordinates of a point in n-dimensional space. A point is or is not ""facultative"" according to whether there correspons, or fail to correspond, an equation with real coefficients. The character of the roots depends on the bounding surface or surfaces of the facultative regions, and on a single surface depending on the ""discriminant.""(DSB XIII, p. 219).‎

‎Anti-Semitism in the Soviet Union. Its Roots and Consequences Anti-Semitism in the USSR: Its Roots and Consequences In E‎

‎Anti-Semitism in the Soviet Union. Its Roots and Consequences Anti-Semitism in the USSR: Its Roots and Consequences In English (ask us if in doubt)./Anti Semitism in the Soviet Union. Its Roots and Consequences Antisemitizm v SSSR. Ego korni i posledstviya In three volumes. Books in English. SKUalb41e1f20d4cdad502.‎

‎Species of wild flowers of the USSR. Descriptive catalogue of bulbs and roots. T‎

‎Species of wild flowers of the USSR. Descriptive catalogue of bulbs and roots. Types of wildflowers of the USSR. Narrative catalogue of bulbs and roots In English (ask us if in doubt)/Species of wild flowers of the USSR. Descriptive catalogue of bulbs and roots. Vidy polevykh tsvetov SSSR. Opisatelnyy katalog lukovits i korney. Compiled on the basis of materials by A. I. Vvedensky. Edited by B. A. Fedchenko. In English. Moscow. Lektechsyrio Corporation. 1935. 54 p. 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. SKUalb801d6afd06715358‎

‎Vedensky A.I. Fedchenko B.A. ). Species of wild flowers of the USSR Descriptive catalogue of bulbs and roots Types of w‎

‎Vedensky A.I. Fedchenko B.A. ). Species of wild flowers of the USSR Descriptive catalogue of bulbs and roots Types of wildflowers of the USSR: Narrative catalogue of bulbs and roots). In Russian (ask us if in doubt)./VvedenskiyA.I. FedchenkoB.A. ). Speciesofwildflowersof the USSR Descriptive catalogue of bulbs and roots Vidy polevykh tsvetov SSSR: Opisatel'nyy katalog lukovits i korney). With color tables. comp. from materials of A. Vvedensky ed. by B.A. Fedtschenko. Moscow. Lektechsyrio Corporation 1935. 54 p. SKUalb114f5770b06bf81f.‎

‎Vegetable Seed Catalogue. Vegetable and melon crops. Feed roots./Katalog ovoshc‎

‎Vegetable Seed Catalogue. Vegetable and melon crops. Feed roots./Katalog ovoshchnykh semyan. Ovoshchnye i bakhchevye kul'tury. Kormovye korneplody. Vegetable Seed Catalogue. Vegetable and melon crops. Feed roots. 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. SKUbd-42e2bdf744e50983.‎