Topology (Greek topos, place and logos, study) is a branch of mathematics concerned with spatial properties preserved under bicontinuous deformation (stretching without tearing or gluing); these are the topological invariants. When the discipline was first properly founded, in the early years of the 20th century, it was still called geometria situs (Latin geometry of place) and analysis situs (Latin analysis of place). From around 1925 to 1975 it was the most important growth area within mathematics.
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Topological :: Quantum Field Theory

Algebraic Topology Discussion List - The primary functions of this list are: providing abstracts of papers posted to the Hopf archive, providing information about topology conferences, and serving as a forum for topics related to algebraic topology. The site also serves as an archive of links to websites related to algebraic topology.
British Topology Home Page - A source of pointers to Topology-related sites, including archives and conference announcements.
Links to Low-dimensional Topology - Topics: General, Conferences, Pages of Links, Knot Theory, 3-manifolds, Journals.
MAA Basic Library List in Topology - MAA recommended books in General, Geometric, Algebraic and Differential Topology.
Mazes and Mathematics - History and mathematical analysis of labyrinths.
Meta Description: [ History and mathematical analysis of
labyrinths ]
Planar Machines - an Invitation to Topology. - Java applets exploring configuration spaces.
The Cantor Set - Article in the Platonic Realms, describing the Cantor discontinuum, a favorite example of topology. Includes examples and illustrations.
Meta Description: [ The fractal known as the Cantor Set, an exposition from the Platonic Realms Interactive Math Encyclopedia. ]
Topics in Mathematics - Topology - In the Mathematics Archives at University of Tennessee, Knoxville.
Topological Methods in Group Theory - Table of contents only, but draft chapters can be downloaded by arrangement.
Topology - Descriptions and illustrations of several topological and differential geometry related notions.
Topology Atlas - Preprints, abstracts, calendar, links, other resources.
Topology Glossary - Definitions of over 100 terms in topology.
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Topology of Manifolds: Supersymmetry and QFT - This is the web resource page for a course taught by John Morgan in Fall 1997 at Columbia University.
TTT on WWW - The Transpennine Topology Triangle is a topology seminar partially supported by the London Mathematical Society with vertices at Leicester, Manchester and Sheffield.
What is Topology? - An introductory essay by Neil Strickland, University of Sheffield.
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