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Description
Experiments in Topology"A mathematician named Klein Thought the Moebius band was divine. Said he: 'If you glue The edges of two, You'll get a weird bottle like mine.' " Stephen Barr In this lively book, the classic in its field, a master of recreational topology invites readers to venture into such tantalizing topological realms as continuity and connectedness via the Klein bottle and the Moebius strip. Beginning with a definition of topology and a discussion of Euler's
"A mathematician named KleinThought the Moebius band was divine.
Said he: 'If you glue
The edges of two,
You'll get a weird bottle like mine.' " -- Stephen Barr In this lively book, the classic in its field, a master of recreational topology invites readers to venture into such tantalizing topological realms as continuity and connectedness via the Klein bottle and the Moebius strip. Beginning with a definition of topology and a discussion of Euler's theorem, Mr. Barr brings wit and clarity to these topics:
New Surfaces (Orientability, Dimension, The Klein Bottle, etc.)
The Shortest Moebius Strip
The Conical Moebius Strip
The Klein Bottle
The Projective Plane (Symmetry)
Map Coloring
Networks (Koenigsberg Bridges, Betti Numbers, Knots)
The Trial of the Punctured Torus
Continuity and Discreteness ("Next Number," Continuity, Neighborhoods, Limit Points)
Sets (Valid or Merely True? Venn Diagrams, Open and Closed Sets, Transformations, Mapping, Homotopy) With this book and a square sheet of paper, the reader can make paper Klein bottles, step by step; then, by intersecting or cutting the bottle, make Moebius strips. Conical Moebius strips, projective planes, the principle of map coloring, the classic problem of the Koenigsberg bridges, and many more aspects of topology are carefully and concisely illuminated by the author's informal and entertaining approach.
Now in this inexpensive paperback edition, Experiments in Topology belongs in the library of any math enthusiast with a taste for brainteasing adventures in the byways of mathematics.
Binding Type: Paperback
Publisher: Dover Publications
Published: 03/01/1989
ISBN: 9780486259338
Pages: 238
Weight: 0.51lbs
Size: 7.93h x 5.39w x 0.48d
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★★★★★ 5
Love!
Size: One Size, Color: Black
Love Coach! Great purchase! Size and look fits what I was looking for.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
⭐️⭐️⭐️⭐️⭐️ Comfort, Style, and Performance — Perfect for Daily Runs and All-Day Wear!
Size: 11, Color: Black/Dark Smoke Grey
I purchased the Nike Men’s Quest 6 for my son, and he’s been absolutely thrilled with them. From the moment he put them on, he noticed how lightweight and supportive they felt — a great balance between cushioning and responsiveness.
He wears them both for running and casual outings, and they’ve held up beautifully. The breathable mesh upper keeps his feet cool even during longer runs, and the midsole cushioning absorbs impact nicely without feeling too soft or unstable. The grip on the outsole provides solid traction on roads and gym floors, giving confidence with every step.
Design-wise, they look sleek and modern — the classic Nike styling pairs well with both athletic and casual outfits. After several weeks of use, the shoes still look almost new, showing how well they’re built.
Pros:
✅ Lightweight yet supportive — great for running or walking
✅ Comfortable fit right out of the box
✅ Excellent breathability and cushioning
✅ Durable construction that holds up with daily use
✅ Stylish design that transitions easily from workout to casual wear
Cons:
• Runs slightly narrow, so consider sizing up if between sizes
Overall, the Nike Quest 6 offers exceptional comfort and quality for the price. My son says they’re some of the most comfortable shoes he’s ever worn — perfect for both training and everyday wear.
If you’re looking for a reliable running shoe that combines performance, durability, and style, this is an excellent choice.
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Reviewed in the United States on October 5, 2025
★★★★★ 5
Excellent Running Shoe
Size: 11, Color: Black/University Red/White
The Nike Quest 6 has been a great fit right out of the box. The sizing felt true, and the shoe wrapped comfortably without feeling tight or loose. It was easy to get a secure, natural fit from the first wear.
Quality is solid for everyday use. The materials feel well put together, and the shoe holds up nicely for walking and light running. It feels dependable and comfortable for regular wear.
What really stood out was the value. The price was much better than what I saw in retail stores, especially for a Nike shoe that performs this well. It’s an easy way to get a reliable running shoe without paying full store pricing.
Overall, it’s a comfortable, well-made shoe that delivers a lot for the cost.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Good product
Size: 9, Color: Black/Dark Smoke Grey
Great shoes and they seem to have good support qualities. They are super comfortable and I love the all black coloring and it is good for my job to look professional.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Good for training
Super cool looking, comfy, lightweight, good price and great for running. Im using a size 9.5/ 27.5cm and it fits perfect, with half an inch of space for my toes.
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Reviewed in the United States on April 6, 2026