Pulation square
In category theory, a branch of mathematics, a pulation square (also called a Doolittle diagram) is a diagram that is simultaneously a pullback square and a pushout square. It is a self-dual concept.
References
[edit]- Adámek, Jiří; Herrlich, Horst; Strecker, George E. (2004) [1990]. Abstract and Concrete Categories (PDF) (free online ed.). Originally published by John Wiley & Sons; ISBN 0-471-60922-6.
- Herrlich, Horst; Strecker, George E. (1979) [1973]. Category Theory. Sigma Series in Pure Mathematics. Vol. 1 (2nd ed.). Berlin: Heldermann. ISBN 3-88538-001-3.
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