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Timeline for Continuous relations?

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Jun 15, 2020 at 7:27 history edited CommunityBot
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Mar 18, 2018 at 3:40 comment added user57432 @Lehs: I think you can also define another notion of continuity of relations (motivated by this) by saying that a relation $R:X\to Y$ is said to be continuous at a point $x\in X$ iff for any neighborhood $V$ of $R(\{x\})$ there exists a neighborhood $U$ of $x$ such that $R(U)\subseteq V$. (Here $R(\{x\}):=\{y\in Y:(x,y)\in R\}$ and $R(U)$ is as defined in Definition 1). I don't know (at least till now) whether this definition even satisfies any of $(1),(2)$ or $(3)$ but I think it is worth a try.
Mar 16, 2018 at 17:56 history edited user57432 CC BY-SA 3.0
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Mar 16, 2018 at 17:35 history answered user57432 CC BY-SA 3.0