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Title: A Great Introductory Functional Analysis Textbook!
Review: In deed, Kolmogorov and Fomin did it again to co-author a wonderful math book as their "Introductory Real Analysis" (by Dover). A major difference between American writers and Russian writers in math writing is that Russian authors are more reader concious. Consequently, their books are more reader-friendly. No show off in one's math level and no unnecessary skip of key steps to slow down the reader. Their books' price is also always reasonable. I recommend this book for senior math and engineering students interested in mastering the modern language of math.
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