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Description
Infinite Abelian GroupsIn the Introduction to this concise monograph, the author states his two main goals: first, "to make the theory of infinite abelian groups available in a convenient form to the mathematical public; second, to help students acquire some of the techniques used in modern infinite algebra." Suitable for advanced undergraduates and graduate students in mathematics, the text requires no extensive background beyond the rudiments of group theory. Starting
In the Introduction to this concise monograph, the author states his two main goals: first, "to make the theory of infinite abelian groups available in a convenient form to the mathematical public; second, to help students acquire some of the techniques used in modern infinite algebra." Suitable for advanced undergraduates and graduate students in mathematics, the text requires no extensive background beyond the rudiments of group theory.Starting with examples of abelian groups, the treatment explores torsion groups, Zorn's lemma, divisible groups, pure subgroups, groups of bounded order, and direct sums of cyclic groups. Subsequent chapters examine Ulm's theorem, modules and linear transformations, Banach spaces, valuation rings, torsion-free and complete modules, algebraic compactness, characteristic submodules, and the ring of endomorphisms. Many exercises appear throughout the book, along with a guide to the literature and a detailed bibliography.
Binding Type: Paperback
Publisher: Dover Publications
Published: 12/18/2018
ISBN: 9780486828503
Pages: 112
Weight: 0.30lbs
Size: 8.90h x 5.90w x 0.20d
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★★★★★ 5
007 watch
Color: Grey
The Omega version cost $11.300, this Pagani version cost me $124. What can I say ? Whatch looks great, comfortable, I'm gonna buy another one to my brother.
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Solid all-around watch
Color: Grey
I was looking for something that I could wear just about anywhere. I wouldn't wear this to the gym, but it looks good in casual, work, elevated, and even some dress environment. Black-tie, I might look for something a bit more elegant, but 95% of the time, this watch fits.
Keeps good time. I haven't witnessed a full 80 hour power reserve yet, but I also can't say that I ever needed that much. Lume is nice, just give it a chance to charge up.
I like this more than the PRX. It's a more classic look, I think PRX will look silly in a short time in comparison.
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Reviewed in the United States on May 4, 2023
★★★★★ 5
Excellent value, beautiful aesthetics
Color: Grey, Color: Grey
This watch confirms what is mentioned in reviews all over the internet- a great value proposition in so many ways. Accuracy has been +3s/week, well within specification, and rivals that of much more expensive watches, including chronometers. The bracelet has a quality feel and heft, and the case contours nicely to the wrist and is very comfortable. The green dial appears to change color with different angles and absolutely pops in the sunlight. Highly recommended, even as a first automatic/mechanical watch.
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Reviewed in the United States on February 22, 2022
★★★★★ 5
Very well built, will last you a very long time
Style: Trifold, Style: Trifold
This wallet is very sturdy, and barely has any wear on it after I've purchased it over a year ago. Most wallets will start to greatly scuff, wear, or degrade/break down just from being taken in and out of your pocket but this wallet has held up particularly wear with VERY MINIMAL light scuffing. Quality leather so I know I will have this wallet for a very long time! It has great card holding capacity as i currently have about 10 cards in it and it still has a pretty slim profile. The wallet itself is a very nice, natural looking wallet. The ease of pulling cards in and out definitely has made me a fan.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Rugged, Stylish, and Built to Last
Style: Bi-fold
I bought this Carhartt oil-tan leather wallet for my husband, and it’s exactly what I hoped for. The leather feels thick and high quality, with that classic rugged Carhartt look. The stitching is solid, and it’s clear this wallet will hold up for years of daily use.
It has plenty of card slots and an ID window, but still stays slim enough to fit comfortably in a back pocket. The canvas lining is a nice touch, and the embossed Carhartt logo adds just the right amount of style.
It even came packaged in a collectible tin, which made it perfect for gifting. Highly recommend to anyone who wants a durable, functional, and great-looking wallet!
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Reviewed in the United States on August 10, 2025