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Description
Naive Set TheoryThis classic by one of the twentieth century's most prominent mathematicians offers a concise introduction to set theory. Suitable for advanced undergraduates and graduate students in mathematics, it employs the language and notation of informal mathematics. There are very few displayed theorems; most of the facts are stated in simple terms, followed by a sketch of the proof. Only a few exercises are designated as such since the book itself is an
This classic by one of the twentieth century's most prominent mathematicians offers a concise introduction to set theory. Suitable for advanced undergraduates and graduate students in mathematics, it employs the language and notation of informal mathematics. There are very few displayed theorems; most of the facts are stated in simple terms, followed by a sketch of the proof. Only a few exercises are designated as such since the book itself is an ongoing series of exercises with hints. The treatment covers the basic concepts of set theory, cardinal numbers, transfinite methods, and a good deal more in 25 brief chapters."This book is a very specialized but broadly useful introduction to set theory. It is aimed at 'the beginning student of advanced mathematics' ... who wants to understand the set-theoretic underpinnings of the mathematics he already knows or will learn soon. It is also useful to the professional mathematician who knew these underpinnings at one time but has now forgotten exactly how they go. ... A good reference for how set theory is used in other parts of mathematics." -- Allen Stenger, The Mathematical Association of America, September 2011.
Binding Type: Paperback
Publisher: Dover Publications
Published: 04/19/2017
ISBN: 9780486814872
Pages: 112
Weight: 0.30lbs
Size: 8.90h x 5.90w x 0.20d
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4.8 ★★★★★
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Product Reviews
★★★★★ 4
Sturdy toy!
Size: Medium
My dog loves this toy. Great handle and sturdy for tug.
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Reviewed in the United States on December 14, 2025
★★★★★ 5
Rottie Approved
Size: Large
My Rottie loves playing with this ball, either alone or with me. The first day she chewed a corner of the handle off (the handle is still usable), but then she figured out what it was for and has a blast with it. She has done no further damage to it, and it is strong enough to play tug. It's her favorite toy.
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Reviewed in the United States on May 18, 2026
★★★★★ 1
Not good for small dog or puppy and only one came
Size: Large
Only one arrived- expecting two, as the picture showed. And honestly my dog keeps getting its jaw hooked on the product. I wouldnt recommend this product for a smaller jawed dog or puppy.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Our dog loves this toy so much we bought her a second one!
Size: Large, Size: Large
This is absolutely the best dog toy! Our girl has destroyed just about every other toy we have gotten her, but these have lasted 4 months with no sign of damage or wear (just lots of dirt!). She always has one of these in her mouth (occasionally both when she manages it). They survive tug of war, they are great for throwing, and even better for kicking. Have two is super handy for alternating which ball you kick/throw. Super glad we found them - I can't recommend them enough!
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Reviewed in the United States on November 29, 2023
★★★★★ 3
Just 1 toy!
Size: Medium
We have a big dog and a small dog. This is a perfect toy for both of them. However, my low rating comes from the seller. The ad description showed two balls for just under $15. (What a deal!). I received one ball….. and when I went to look back, it does in fact say much lower in the description “ you will receive one of these two color options”
Generally, if they’re just showing you color, you have a choice in this case I did not have a choice and I find the post with two balls very deceiving!
Five stars for the toy one star for the seller equals three stars
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Reviewed in the United States on November 8, 2025