Can anyone suggest a collection of (solved) exercises in topology? Undergrad level, as a companion to Dugundji's Topology (although excellent it doesn't provide the solutions to the problems).
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Elementary Topology Problem Textbook O. Ya. Viro, O. A. Ivanov, N. Yu. Netsvetaev, V. M. Kharlamov, is available freely online at
This book is published by AMS and that comes with solutions.
I'd recommend "Elementary Topology Problem Textbook" by Viro, Ivanov, Netsvetaev, Kharlamov.