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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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Size: 8, Color: Dense Smoke
No son del # vienen más pequeños
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Super fun!
Size: 8.5, Color: Red Pepper
These are so fantastic! The color is amazing! It is a bit on the tomato-red side of the color-wheel. The fit is great. They are comfortable from the 1st step. Easy to walk in.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
Nice so far.
Size: 6.5, Color: Molasses
Comfy. They were tight the first day across the toes but as I've worn them a couple times they are loosening up. The sole is forming to my foot. These are very much like Doc Martin's from the early 2000s. Not sure about quality since I haven't had them for very long.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Comfortable
Size: 6, Color: Black
Great sandal! Fits great and comfy
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Reviewed in the United States on April 3, 2026
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Size: 5, Color: Molasses
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Reviewed in the United States on June 13, 2026