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Theory of numbers
Theory of numbers
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Theory of numbers

Marsoni M251S
Sale price$29.90
Pay 4 payments of $7.47 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Theory of numbers"Theory of Numbers" by George Ballard Mathews is a foundational work in number theory. Written with clarity and precision, the book explores key topics such as divisibility, prime numbers, congruences, quadratic residues, and Diophantine equations. Mathews provides rigorous mathematical proofs while maintaining an accessible style, making it valuable for both students and researchers. Though intended as the first volume of a larger series, this book
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Amy Miller
Charlottesville, US
★★★★★ 2
DIdn't Work
When I got the watch, it wasn't running, so I took it to a local jewelry store and had the battery replaced, which cost another $20+ and it still wouldn't run.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 18, 2023
B
Verified Purchase
Betty
Draper, US
★★★★★ 5
Stunning automatic watch — looks way more expensive than it is
Color: All Gold, Color: All Gold
I bought this OLEVS automatic as a gift for my husband and he was thrilled. The gold-tone finish is rich and consistent, the open-heart dial showing the movement is a beautiful touch, and the day/week sub-dials work smoothly. The caseback shows the automatic movement clearly — you can see the rotor spinning with every wrist movement. It feels comfortable and the bracelet is solid. For the price, this is an outstanding piece. He gets compliments every time he wears it.​​​​​​​​​​​​​​​​
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Reviewed in the United States on April 9, 2026
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Verified Purchase
Juan Miguel Berrios
Massapequa, US
★★★★★ 5
Nice and elegant
Color: All Gold
I love it so much really nice and elegant!!! I'd definitely recommend it!!
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Reviewed in the United States on February 17, 2026
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Lixander Del toro Montiel
Birmingham, US
★★★★★ 5
Reloj ⌚️
Color: Green
Es un reloj automático super bueno
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Reviewed in the United States on May 17, 2026
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Verified Purchase
Curtis Brooks
Belleville, US
★★★★★ 5
Great Mechanical Self-winder
Color: Black
Wow! So far I have only adjusted the time three times over the last few months. So far It keeps great time and looks good. Well worth the money after having blown a few dollars on less expensive mechanical watches that fail after only a few months of use. This thing is very good!
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Reviewed in the United States on December 11, 2024

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