Robert G Sachs (49 results)

Paperback. Condition: As New. No Jacket. Pages are clean and are not marred by notes or folds of any kind. ~ ThriftBooks: Read More, Spend Less.

paperback. Condition: Good.

paperback. Condition: Good. Connecting readers with great books since 1972! Used textbooks may not include companion materials such as access codes, etc. May have some wear or writing/highlighting. We ship orders daily and Customer Service is our top priority.

Condition: Good. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

paperback. Condition: Good. Ships quickly. Mild to moderate shelf/reading wear. Orphans Treasure Box sells books to raise money for orphans and vulnerable kids.

paperback. Condition: Very Good. Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority.

Hardcover. Condition: Good. Gray cloth, gold over red lettering, lightly rubbed, a tad loose. Owner's name inside cover. Science.

paperback. Condition: Good. Paperback. NOT Ex-library. Good condition. Until further notice, USPS Priority Mail only reliable option for Hawaii. Proceeds benefit the Pima County Public Library system, which serves Tucson and southern Arizona.

Hardcover. Condition: Fair. Hardback, surplus library copy with usual stampings; reference number taped to spine; edge wear, fading to cover; former owner's name written inside f ront board; inside front hinge going; fair condition with clean text.

Hardcover. Condition: Good. No Jacket. 1st Edition.

Soft cover. Condition: Very Good. Trade paperback in very good + condition.

383pp. of the: Addison-Wesley Series in Advanced Physics. Ex-library, light cover soil, text clean/tight: VG/no dj.

Paperback. Condition: Very Good+. 2nd Printing. B&W Illustrations; This is a trade paperback book, with illustrated cardstock covers and a glued spine. This book is in Very Good+ condition and was issued without a dust jacket. The book and its contents are in clean, bright condition. There is some light toning and ground-in dirt to all edges of the text block. There is also a previous owner's embossed name stamp on the title page. "The notion that fundamental equations governing the motions of physical systems are invariant under the time reversal transformation (T) has been an important, but often subliminal, element in the development of theoretical all sclaes, from gases and condensed matter to subnuclear physics and the quantum theory of fields." (from Wikipedia).…

Hardcover. Condition: Very Good. No Jacket. 1st. First Edition, First Printing; rust c w/silver gilt titles; owners' names; small tear on flyleaf; 383 clean, unmarked pages.

Paperback. Condition: Near Fine. First paperback printing. Near fine in blue, illustrated wraps.

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.

Condition: very_good. Gently read. May have name of previous ownership, or ex-library edition. Binding tight; spine straight and smooth, with no creasing; covers clean and crisp. Minimal signs of handling or shelving. 100% GUARANTEE! Shipped with delivery confirmation, if you're not satisfied with purchase please return item! Ships USPS Media Mail.…

Paperback. Condition: Good. No Jacket. First Edition. Large paperback. Light general wear, spine creased, with large gouge. Text clean. 283 pages, 17 articles, figures, b/w plates. Proceedings of the U of C commemorative symposium.

Soft cover. Condition: Near Fine. 1st Edition. Appears to be a First Edition of the soft cover (Number Line 96 down to 87 and then 54321 to the right of that). Either way, this book was previously owned by J. T. Fraser and has his bookplate neatly affixed to the front inside cover. As I've written in the other listings, I purchased this book, and another dozen or so of his books having in one way or another to do with Time, in Westport, Connecticut where he lived. Dr. Fraser may have lost his favorite red pen through most of the reading of his book, but it reappears seven pages from the end of the book and he underlined on four of those. This book is in excellent condition. As you can see from the photos, the covers are quite clean (they have a bit of 'clouding') and they don't appear to have any wear. That description applies to the pages in the book as well. They are very clean (there is a speck of a spot on the front inside cover and half- title page, I didn't see any other soiling on any of the other pages. The tip of the bottom corner of three consecutive pages has a little crease and the tip of the top corner of two pages has a little crease. I didn't see any other creasing. There are no markings. The aforementioned bookplate is the only attachment. From the first paragraph of his Wikipedia profile: 'J. T. Fraser (1923-2010) made important scholarly contributions to the interdisciplinary Study of Time and was a founding member of the International Society for the Study of Time. His work has strongly influenced thinking about the nature of time across the disciplines from physics to sociology, biology to comparative religion, and he was a seminal figure in the general interdisciplinary study of temporality.' 'This book introduces new developments in the field of Time-Reversal Symmetry presenting, for the first time, the Wigner time-reversal operator in the form of a product of two or three time-reversal ope's rators of lower symmetry. The action of these operators leads to the sign change of only one or two angular momentum components, not of all of them. It demonstrates that there are six modes of time-reversal symmetry breaking that do not lead to the complete disappearance of the symmetry but to its lowering. The full restoration of the time-reversal symmetry in the six cases mentioned is possible by introducing six types of metaparticles. The book also confirms the presence of six additional time-reversal operators using a group-theoretical method. The problem is only where to seek these metaparticles. The book discusses time-reversal symmetry in classical mechanics, classical and relativistic electrodynamics, quantum mechanics and theory of quantized fields, including dynamical reversibility and statistical irreversibility of the time, Wigner's and Herring's criteria, Kramers theorem, selection rules due to time-reversal symmetry, Onsager's relations, Poincaré recurrence theorem, and CPT theorem. It particularly focuses attention on time-reversal symmetry violation. It is proposed a new method of testing the time-reversal symmetry, which is confirmed experimentally by EPR spectroscopy data. It shows that the traditional black-white point groups of magnetic symmetry are not applicable to magnetic systems with Kramers degeneration of energy levels and that magnetic groups of four-color symmetry are adequate for them. Further, it addresses the predicted structural distortions in Kramers three-homonuclear magnetic clusters due to time-reversal symmetry that have been identified experimentally. Lastly, it proposes a method of synthesis of two-nuclear coordination compounds with predictable magnetic properties, based on the application of the time-reversal transformation that was confirmed experimentally.'.…

Condition: very_good. This book is in Very good condition. There may be a few flaws like shelf wear and some light wear.

Condition: As New. Unread book in perfect condition.

Soft cover. Condition: As New. 1987 Edition. tiny prev owner sig on F.E.P.

Condition: Good. Light shelfwear, inscriptions to the front. Clean and readable inside. A decent hardback.

Condition: new.

Condition: New.

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

Condition: New. Num Pages: 324 pages, black & white illustrations. BIC Classification: PHR. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 228 x 156 x 18. Weight in Grams: 534. . 1987. 1st Edition. Paperback. . . . .

Hardcover. Condition: Very Good. No Jacket. Hardcover, with gold lettering on the spine. Not ex. library. 395 pages, illustrated with charts and tables. A very nice copy, just very light wear on the corners. Contents clean, tight and bright. Book.

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

Condition: New. In English.