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Description
Introduction to Topology: Second EditionOne of the most important milestones in mathematics in the twentieth century was the development of topology as an independent field of study and the subsequent systematic application of topological ideas to other fields of mathematics. While there are many other works on introductory topology, this volume employs a methodology somewhat different from other texts. Metric space and point set topology material is treated in the first two chapters;
One of the most important milestones in mathematics in the twentieth century was the development of topology as an independent field of study and the subsequent systematic application of topological ideas to other fields of mathematics.While there are many other works on introductory topology, this volume employs a methodology somewhat different from other texts. Metric space and point-set topology material is treated in the first two chapters; algebraic topological material in the remaining two. The authors lead readers through a number of nontrivial applications of metric space topology to analysis, clearly establishing the relevance of topology to analysis. Second, the treatment of topics from elementary algebraic topology concentrates on results with concrete geometric meaning and presents relatively little algebraic formalism; at the same time, this treatment provides proof of some highly nontrivial results. By presenting homotopy theory without considering homology theory, important applications become immediately evident without the necessity of a large formal program.
Prerequisites are familiarity with real numbers and some basic set theory. Carefully chosen exercises are integrated into the text (the authors have provided solutions to selected exercises for the Dover edition), while a list of notations and bibliographical references appear at the end of the book.
Binding Type: Paperback
Publisher: Dover Publications
Published: 02/16/1999
ISBN: 9780486406800
Pages: 256
Weight: 0.69lbs
Size: 9.20h x 6.15w x 0.48d
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★★★★★ 4
Good coverage
Style: SPF 50, Size: 5 Fl Oz (Pack of 1)
Great sunscreen and when applied liberally my face doesn't get burnt. That has always been a problem with my skin all my life so I'm happy for that sort of coverage.
The formula is a little greasy and there is a white caste but I use it to my advantage as it dims the red spots on my face and brightens my under eye. I try not to leave the house without applying.
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Reviewed in the United States on September 26, 2025
★★★★★ 5
Smooth sunscreen
Style: SPF 50, Size: 5 Fl Oz (Pack of 1)
Great for mature skin. Not easy finding something for mature skin that doesn’t cake or flake off. Moisturizing. I will buy again !
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Very glowy
Style: SPF 50, Size: 5 Fl Oz (Pack of 1), Style: SPF 50, Size: 5 Fl Oz (Pack of 1)
I just opened this to try it so I can't speak on if it breaks me out but the expiration date is good it doesn't expire until next summer. It's not thick at all very liquid actually but not a messy. I skipped moisturizer today to see how the hydration will be. I have severe dry skin so we will see. Very oily, glowy, moisturizing. I used it on my face and arms. It left a beautiful glow on my face so we will see how long it's takes to soak in. No strong smell which is nice and it's a large bottle!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Sunscreen
Style: SPF 50, Size: 5 Fl Oz (Pack of 1)
Good product
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Reviewed in the United States on May 30, 2026
★★★★★ 3
Very moisturizing but clogged my pores
Style: SPF 50, Size: 5 Fl Oz (Pack of 1)
I like the texture of this sunscreen a lot, and it gives me a nice glow. However, it did cause me to break out a lot with small whiteheads so I had to discontinue using it.
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Reviewed in the United States on April 17, 2026
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