Coanalytic set
In descriptive set theory, a coanalytic set is a set (typically a subset of a Polish space) that is the complement of an analytic set. In the projective hierarchy, coanalytic sets correspond to sets.
References
- ↑ Kechris (1995), p. 87.
- Kechris, Alexander S. (1995). Classical Descriptive Set Theory. Graduate Texts in Mathematics. Vol. 156. New York: Springer. ISBN 978-0-387-94374-9.
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