Bulletin of the Polish Academy of Sciences Mathematics · 2011 · 29 citations · 9 references
Natural SciencesMathematicsTopologyFundamental GroupKnot TheoryLow-dimensional TopologyQuotient TopologyTopological GroupsFundamental Group ActionsFundamental Group Of A ManifoldFundamental Group Of A Topological SpaceQuotient MapsQuotient StructuresQuotient Topological Groups
The natural quotient map $q$ from the space of based loops in the Hawaiian earring onto the fundamental group provides a naturally occuring example of a quotient map such that $q\times q$ fails to be a quotient map. With the quotient topology, this exampl
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A convenient category of topological spaces.
Norman Steenrod · The Michigan Mathematical Journal · 1967 · 477 citations · Full text
A Van Kampen Theorem for Weak Joins
John W. Morgan, Ian Morrison · Proceedings of the London Mathematical Society · 1986 · 74 citations · Full text