Hartree Douglas Rayner (8 results)

Hardcover. Condition: Very Good. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting.

Clarendon Press, Oxford 1955. Second printing. xiv, 287 pp. Publisher's cloth. Bookplate. Fine condition.

Soft cover. Condition: Good. No Jacket. First. 138pp, wear, soil, Weight is 1.5 lb. W/full markings and pocket. Has/may have some pages stuck on the edge of the top margin due to some unintelligent using stencil ink (Paint) to blot out the library edge marking. Frayed edges/cnrs, paint stains on both cvrs. Ex-Library Size: 8vo. Book.

Condition: Fair. Manchester 1933 first edition. Memoirs and Proceedings of Manchester Literary & Philosophical Society 1932-33. Original pale blue printed wraps. octavo. Hartree articles on pp. 69-90 and 91-107. Hartree's work in numberical analysis contributed to development of calculators and computers. Cover Fair, creased and worn with light chipping; text near Fine, clean and bright. Institute stamp on cover. no other ownership marks.

Leatherbound. Condition: NEW. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. Reprinted from 1953 edition. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set and contains approximately 48 pages. IF YOU WISH TO ORDER PARTICULAR VOLUME OR ALL THE VOLUMES YOU CAN CONTACT US. Resized as per current standards. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Language: English.

254 x 181 mm. Tall 8vo. Pages 550-558. [Entire volume: viii, 645, [2] pp.] 4 tables. Quarter navy morocco, morocco corners, raised bands, gilt spine; spine lightly faded. Blind stamp of the Carnegie Institution of Washington, Mount Wilson Observatory. Fine. "Hartree and his collaborators evaluated wave functions for more than twenty-five different atomic species in various states of ionization. Through his stimulus and encouragement many more atoms were investigated by physicists throughout the world. Hartree's equations as generalized by V. Fock proved to be extremely valuable in theoretical calculations in sold state physics." DSB, VI, p. 147.

8vo. xiv, 287 pp. 31 figs., bibliog., index. Navy cloth, gilt spine, dust-jacket. Ownership rubber stamps of Robert L. White. Fine. FIRST EDITION. "Calculation originally, and over a long period, meant numerical calculation â" the repertoire of arithmetical operations such as addition, subtraction, multiplication and division, and procedures such as extraction of square roots, which could be applied to arbitrary numbers: integers, fractions, and rational, irrational and transcendental numbers. Subsequent developments of such procedures into powerful methods for the solution of general mathematical problems in numerical terms came to known, in English, as numerical analysis." Ifrah, The universal history of computing, p. 69. DSB, VI, p. 148.

1st Edition. FIRST EDITION OFFPRINT OF DOUGLAS HARTREE'S DEVELOPMENT OF THE "SELF-CONSISTENT FIELD METHOD TO THE CALCULATION OF ATOMIC WAVE FUNCTIONS OF POLYELECTRONIC ATOMS" (Dictionary of Scientific Biography, VI, 147). "Hartree played a fundamental role in the field of twentieth-century numerical analysis and its application to theoretical physics" (ibid). "The mid- to late 1920s was a time of great change and excitement in theoretical physics, and Hartree was becoming a well-known figure in the field. When news of Erwin Schrödinger's work on wave mechanics reached Cambridge, Hartree was ideally placed to make a contribution.His experience of numerical integration of differential equations, gained during his ballistics work in World War I, was invaluable. Hartree was able to develop and apply numerical techniques to the solution of increasingly complex atomic structures" (ibid). By 1939 and with the publication of this paper, Hartree made "his chief contribution to science. his development of powerful methods of numerical mathematical analysis, which made it possible for him to apply successfully the so-called self-consistent field method to the calculation of atomic wave functions of polyelectronic atoms, that is, those which in the neutral condition have more than one electron surrounding the nucleus. These calculations involved the numerical solution of the partial differential equations of quantum mechanics for many-body systems subject to the usual boundary conditions. From the atomic wave functions it is possible to calculate the average distribution of negative electric charge as a function of distance from the nucleus. If the distribution has been correctly found for all the electrons in the atom under study, the electric field due to this distribution should lead to the original distribution, in which case the field is called self-consistent" (ibid). Note that one of the co-authors, Bertha Swirles, was a British physicist who carried out research on quantum theory, particularly in its early days. CONDITION & DETAILS: Complete. 4to. (12 x 9 inches, 300 x 225mm). Continuously paginated 229-247. Very light stamp of Yale Medical Library on the front wrap; armorial bookplate on rear of front wrap followed by a small paste on "Ex-Libris Harvey Cushing", the pioneering neurosurgeon for whom the library is named. Bound in original paper wraps with a bit of minor aging. Tightly bound. Pristine throughout. Very good.