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Description
Symmetry Principles in Solid State and Molecular PhysicsThis respected high level text, aimed at professionals and students working on the theory of solids, is particularly valuable for its application of group theory to solid state and molecular physics. The author Distinguished Professor of Physics at City College of New York, widely known for his work in optics, lasers, and solid state physics devotes the first three chapters to a distillation of the most relevant ideas and theorems of group theory (at
This respected high-level text, aimed at professionals and students working on the theory of solids, is particularly valuable for its application of group theory to solid state and molecular physics. The author -- Distinguished Professor of Physics at City College of New York, widely known for his work in optics, lasers, and solid-state physics -- devotes the first three chapters to a distillation of the most relevant ideas and theorems of group theory (at the group point level) and then leads readers directly into group theory applications.Professor Lax provides examples in optical absorption selection rules, spin-orbit coupling, and crystal field theory, plus a complete demonstration of projection techniques. He also develops short-cut and invariant methods for solving molecular vibration problems and for determining the form of crystal tensors; develops the translational properties of crystals, including Bravais lattices and space groups; and explains relevant applications to electron phonon scattering, optical absorption selection rules, electronic energy bands, electron dynamics, and effective Hamiltonians. To illustrate several of these topics, and to show the relation between the microscopic and macroscopic views of elasticity, the author presents a complete study of the diamond structure.
Among the unique features of this volume are its use of subgroup techniques, its consideration of the influence of time reversal on selection rules, its use of shell theorems and invariance techniques to construct the form of tensors, and its use of broken symmetry to relate the symmetry of valence and molecular orbitals to the symmetry of electron molecular wave functions. The book also contains more than 200 carefully selected problems.
Binding Type: Paperback
Publisher: Dover Publications
Published: 03/14/2012
ISBN: 9780486420011
Pages: 512
Weight: 1.39lbs
Size: 9.20h x 6.14w x 1.00d
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★★★★★ 5
Worth the money
Color: Gold-tone Hardware/Leather/Dress Blues
Was made of excellent material and put together nicely. Looked like black in the picture but was dark navy, I just didn’t read the description.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect size
Color: Vanilla/Acorn
Perfect size . This will hold everything you need. It’s not too small not too big
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Colors and size
Color: Vanilla/Acorn
Perfect for my needs
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Polished Everyday Crossbody, Though Priced Like a Designer-Branded Bag
Color: Vanilla/Acorn
This crossbody bag has a clean, classic look that works well for everyday use, errands, travel, or casual outfits where you want something more polished than a basic purse. The north-south shape gives it a slim profile, so it does not feel overly bulky, but it still has enough room for daily essentials like a phone, wallet, keys, small cosmetics, cards, and other small items.
The zipper closure is a practical feature because it keeps everything more secure than an open-top bag, especially when walking around, shopping, or traveling. The front and back zippered pockets are also useful for items you want quick access to, like a phone, receipt, lip balm, or transit card. I like that the layout keeps the bag organized without making it feel complicated.
The material is mostly PVC with some polyester and polyurethane, so it has more of a coated designer-bag feel rather than soft genuine leather. That makes it easier to wipe clean and more resistant to everyday marks, but buyers should know they are paying more for the brand/style than for leather construction. The bag feels structured and presentable, but it may not have the same long-term aging or softness as a real leather crossbody.
For comfort, the crossbody style is convenient because it keeps your hands free and distributes weight better than carrying a small handbag by hand. It is best for people who want a stylish everyday bag, not someone looking for a large tote or something that can carry bulky items.
For pricing, similar branded crossbody bags usually range from about $80–$200, depending on the brand, size, material, and whether it is leather or coated canvas/PVC. At around $180, this is on the premium side for a PVC-blend crossbody, but it is fairly typical for the Michael Kors price range. Overall, it feels worth considering if you like the style and brand name, but value-focused buyers may want to compare sale prices or color options before paying full price.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Stylish, Spacious, and Perfect for Everyday Use
Color: Brown/Acorn
absolutely love this Michael Kors Jet Set Travel crossbody bag! The design is great making it easy to pair with both casual and dressy outfits. It’s surprisingly spacious for its size and keeps all my essentials organized without feeling bulky. The quality of the materials and craftsmanship is excellent, and it feels very durable. This has quickly become my go to bag for everyday use and travel! Great price!
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Reviewed in the United States on April 28, 2026