المصدر: Counterexamples in Topology في منتدى : قسم الرياضيات Counterexamples in Topology By Lynn Arthur Steen, J. Arthur Seebach Contributor J. Arthur Seebach Published by Courier Dover Publications, 1995 ISBN 048668735X, 9780486687353 256 pages Over 140 examples, preceded by a succinct exposition of general topology and basic terminology. Each example treated as a whole. Numerous problems and exercises correlated with examples. 1978 edition. Bibliography. or
