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Description
Undecidable Theories: Studies in Logic and the Foundation of MathematicsThis graduate level book is well known for its proof that many mathematical systems including lattice theory, abstract projective geometry, and closure algebras are undecidable. Based on research conducted from 1938 to 1952, it consists of three treatises by a prolific author who ranks among the greatest logicians of all time. The first article, "A General Method in Proofs of Undecidability," examines theories with standard formalization, undecidable
This graduate-level book is well known for its proof that many mathematical systems--including lattice theory, abstract projective geometry, and closure algebras--are undecidable. Based on research conducted from 1938 to 1952, it consists of three treatises by a prolific author who ranks among the greatest logicians of all time.The first article, "A General Method in Proofs of Undecidability," examines theories with standard formalization, undecidable theories, interpretability, and relativization of quantifiers. The second feature, "Undecidability and Essential Undecidability in Mathematics," explores definability in arbitrary theories and the formalized arithmetic of natural numbers. It also considers recursiveness, definability, and undecidability in subtheories of arithmetic as well as the extension of results to other arithmetical theories. The compilation concludes with "Undecidability of the Elementary Theory of Groups."
Binding Type: Paperback
Publisher: Dover Publications
Published: 08/19/2010
ISBN: 9780486477039
Pages: 98
Weight: 0.35lbs
Size: 8.20h x 5.30w x 0.40d
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1
Lost its quality after gaining popularity
Size: 1 count (Pack of 12)
Iβve been subscribed to this brand for at least 2 years now. It used to be heavy duty, now they switched to cheap thin carton like everyone else has. No point to overpay for average quality.
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Reviewed in the United States on July 12, 2025
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5
Great product
Color: 3675 Silver Blue, Color: 3675 Silver Blue
This watch is beautiful. And feels great
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Reviewed in the United States on March 8, 2026
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1
Junk!
Color: 3675 ALL Silver
Good luck getting the back plate back in once you change the battery! You get what you pay for so spend the extra money and buy a better watch not made in China.
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Reviewed in the United States on May 25, 2026
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4
Really nice watch!
Color: 3675 ALL Black
Really nice and clean looking watch. Fairly easy to adjust the watch band, with a little patience. Item description stated battery operated, but I donβt think it is as there is no indication that it has a battery in it. Other than that, really decent watch! I would have given it a five star rating if it were battery powered.
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Reviewed in the United States on March 23, 2026
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5
Great price
Color: 3675 Silver Grey
The watch looks like it should cost more than the actual price. It catches people's eye and so far it keeps accurate time. Keep in mind I've only had the watch about two weeks. Of my 10 every day watches this one is the most attractive.
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Reviewed in the United States on December 5, 2025
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