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Description
An Introduction to the Geometry of N DimensionsFor many years, this was the only English language book devoted to the subject of higher dimensional geometry. While that is no longer the case, it remains a significant contribution to the literature, exploring topics of perennial interest to geometers. In the first four chapters, author D. M. Y. Sommerville explains the fundamental ideas of incidence, parallelism, perpendicularity, and angles between linear spaces. Chapter V presents analytical
For many years, this was the only English-language book devoted to the subject of higher-dimensional geometry. While that is no longer the case, it remains a significant contribution to the literature, exploring topics of perennial interest to geometers.In the first four chapters, author D. M. Y. Sommerville explains the fundamental ideas of incidence, parallelism, perpendicularity, and angles between linear spaces. Chapter V presents analytical geometry from the projective point of view, exploring some of the simplest ideas relating to algebraic varieties and offering a more detailed account of quadratics. Chapter VI examines analytic geometry of n dimensions from the metric point of view. The remaining four chapters deal with polytopes and address some of the elementary ideas in analysis situs. Chapter VIII treats the content of hyper-special figures, and the final chapter establishes the regular polytope.
For advanced undergraduate and graduate students in mathematics as well as historians of mathematics
Dover unabridged republication of the edition originally published by Methuen & Co., London, 1929.
Binding Type: Paperback
Publisher: Dover Publications
Published: 03/18/2020
ISBN: 9780486842486
Pages: 224
Weight: 0.50lbs
Size: 8.00h x 5.10w x 0.40d
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★★★★★ 3
Nothing necessarily wrong with it
Color: Croissant, Size: Small
Pretty much too small to matter..meh.
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Special dog toy
Color: Cannoli, Size: Large
Great toy
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Reviewed in the United States on February 2, 2026
★★★★★ 5
Fun!
Style: Lobster
My dog just loves this toy, and so do I. It's fun!
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Rip’s easily
Style: Lobster, Style: Lobster
Hello,
I recently purchased one of your dog toys for my pup and while she absolutely loved it, unfortunately it didn’t hold up at all during normal play. She started playing with it as soon as it arrived, but the toy ripped the very first night and all the filler came out of the legs of the lobster design. I was really disappointed that it couldn’t withstand regular play, especially since we were excited about it.
Because the toy was damaged so quickly and didn’t last even one night of play, I’m not interested in buying another one, but I would like to know what your return or replacement policy is for this situation. Is it possible to get a replacement toy or a refund? If you require that the broken toy be sent back, please just let me know how to do that. I’d be happy to send photos if needed.
Thanks so much for your help,
Best regards,
Carolyn Consolo
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Super Fun
Style: Shark
My 8 pound poodle loves this. It works great and has held up well
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Reviewed in the United States on May 25, 2026