Paul E. Long’s 1971 textbook, "An Introduction to General Topology," provides an accessible, classical approach to point-set topology suitable for undergraduates. The text covers essential topics including axiomatic foundations, topological spaces, and continuous functions, featuring ample exercises for skill development. A high-quality digital copy is available to borrow through the Internet Archive Internet Archive An introduction to general topology : Long, Paul E
You'll dive deep into topological spaces, subspaces, and the essential separation axioms ( T0cap T sub 0 T4cap T sub 4 an introduction to general topology paul e long pdf link
Because this is a classic text from 1971, it is widely available through digital libraries and academic archives: Paul E
Would you like more information on General Topology or help with finding the PDF?" A high-quality digital copy is available to borrow
: Subspaces, product spaces, and quotient spaces.
One of the most powerful concepts in topology. Long defines open covers and subcovers, then contrasts sequential compactness (in metric spaces) with compactness in general spaces. The Heine-Borel theorem is proved as a special case. He also covers the finite intersection property and compact subspaces of Hausdorff spaces.
is not legally available for free across the open web, you can legally access and read it through the Internet Archive .