excisive triad
In topology, a branch of mathematics, an excisive triad is a triple of topological spaces such that A, B are subspaces of X and X is the union of the interior of A and the interior of B.{{harvnb|May|2019|loc=Ch 10. Section 7.}} Note B is not required to be a subspace of A.
See also
Notes
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References
- {{cite book | last=May | first=J. Peter | title=A concise course in algebraic topology | year=2019 | isbn=978-7-5192-6659-2 | oclc=1200780491}}
- Munkres, James; Topology, Prentice Hall; 2nd edition (December 28, 1999). {{ISBN|0-13-181629-2}}.
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