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Mar 11, 2018 at 18:56 vote accept Zuhair Al-Johar
Mar 11, 2018 at 18:56 vote accept Zuhair Al-Johar
Mar 11, 2018 at 18:56
Mar 10, 2018 at 9:58 comment added Zuhair Al-Johar $\in_1$ is named as: "set membership of the first kind", $\in_2$ is named as: "set membership of the second kind", and $\in^*$ is "realm membership", and realms are not sets. So they are indeed named differently, but they do share a common word (namely membership) because they do possess major overlaps (except for $\in^*$ which is in some sense different, I usually think of it as a mereologically based relation between atoms and totalities of atoms). I think it is plausible to name distinct highly overlapping entities by overlapping distinct names so that names copy the nature of the named.
Mar 10, 2018 at 1:16 history answered Andreas Blass CC BY-SA 3.0