Definition:Painlevé-Kuratowski Convergence
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Definition
Let $T = \struct {S, \tau}$ be a Hausdorff topological space.
Let $\sequence {C_n}_{n \mathop \in \N}$ be a sequence of sets in $T$.
Let $\sequence {C_n}_{n \mathop \in \N}$ be such that:
- $\ds \liminf_n C_n = \limsup_n C_n = C$
where:
- $\ds \liminf_n C_n$ denotes the inner limit of $\sequence {C_n}_{n \mathop \in \N}$
- $\ds \limsup_n C_n$ denotes the outer limit of $\sequence {C_n}_{n \mathop \in \N}$
Then $\sequence {C_n}_{n \mathop \in \N}$ is said to be convergent in the sense of Painlevé-Kuratowski.
It can be denoted as:
- $C_n \overset K \to C$
or:
- $\operatorname {K-lim} \limits_{n \mathop \to \infty} C_n = C$
or simply:
- $\ds \lim_n C_n = C$
Source of Name
This entry was named for Paul Painlevé and Kazimierz Kuratowski.