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Description
Introduction to Topology: Third EditionHighly regarded for its exceptional clarity, imaginative and instructive exercises, and fine writing style, this concise book offers an ideal introduction to the fundamentals of topology. Originally conceived as a text for a one semester course, it is directed to undergraduate students whose studies of calculus sequence have included definitions and proofs of theorems. The book's principal aim is to provide a simple, thorough survey of elementary
Highly regarded for its exceptional clarity, imaginative and instructive exercises, and fine writing style, this concise book offers an ideal introduction to the fundamentals of topology. Originally conceived as a text for a one-semester course, it is directed to undergraduate students whose studies of calculus sequence have included definitions and proofs of theorems. The book's principal aim is to provide a simple, thorough survey of elementary topics in the study of collections of objects, or sets, that possess a mathematical structure.The author begins with an informal discussion of set theory in Chapter 1, reserving coverage of countability for Chapter 5, where it appears in the context of compactness. In the second chapter Professor Mendelson discusses metric spaces, paying particular attention to various distance functions which may be defined on Euclidean n-space and which lead to the ordinary topology. Chapter 3 takes up the concept of topological space, presenting it as a generalization of the concept of a metric space. Chapters 4 and 5 are devoted to a discussion of the two most important topological properties: connectedness and compactness. Throughout the text, Dr. Mendelson, a former Professor of Mathematics at Smith College, has included many challenging and stimulating exercises to help students develop a solid grasp of the material presented.Binding Type: Paperback
Publisher: Dover Publications
Published: 07/01/1990
ISBN: 9780486663524
Pages: 224
Weight: 0.51lbs
Size: 8.41h x 5.44w x 0.45d
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4.2 ★★★★★
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★★★★★ 5
Surprising amount of room!
I am so pleased with the interior space in the pockets of this purse. It's the perfect size to hold keys, phone, and lots of other junk a mom tends to accumulate! The only downfall is the lack of card-holder spaces...only 4 total slots. I purchased another small card holder apparatus to hold all of my necessities.
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Reviewed in the United States on May 7, 2024
★★★★★ 5
Perfect Mini Backpack for almost any occasion! Fits 11 inch ipad
Color: Black, Color: Black
Giving 5 🌟🌟 🌟🌟🌟, even if I havent used it yet! because it:
-arrived in perfect good packaging, protected and nothing missing.
-11 inch ipad fit with its own pocket(although it did reach the very top of the bag and can feel its corners)
- can fit 2 regular plastic bottled water on both sides
- coin pocket(tho I'll be putting coffee candies and mint instead)
- spacious enough for mini snacks or notebook/light books.
- has 2 pockets inside
- 3 pockets outside(1 at back, 2 at front)
Good value for money. Good for travels!(be using for camping). And I think its water resistant. It is a simple, cute, very functional bag for many occasions
Wish: that the strap would be a bit longer, although I did have extra 2.5 inches before it rested comfortably at my lower back.
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Reviewed in the United States on March 11, 2026
★★★★★ 5
Great Medium-Sized Backpack !
Color: Khaki
This is the best medium sized backpack ! Bought it mainly for that it fit my Kindle since a smaller backpack didn't and the multiple compartments (more than I need but easy access). Lightweight, water resistant, great value and the quality so far is great. I especially like the locking feature should I need it. It's much lighter than my travel purse (PacSafe that I would still use for travel, especially international.) The "security" feature is an added compartment for more local travel.
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Reviewed in the United States on April 4, 2026
★★★★★ 5
Great purse backpack for smaller women
Color: Black
Lots of pockets & great size for smaller women. Lightweight & love the black color.
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Reviewed in the United States on February 19, 2026
★★★★★ 3
Great bag, short shoulder straps
Color: Black
Love the size and the many, many pockets. The quality is great, it's really well made. But the shoulder straps are short. Like for a little kids backpack short. I love the bag so much I'm getting a kit to extend the should straps. But yeah 5 stars for the bag, minus 2 for the short shoulder straps.
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Reviewed in the United States on April 7, 2026
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