The discussion revolves around set theory, specifically examining the elements and subsets of a given set A = {1, {1}, {1, {1}}}. Participants are questioning whether {{{1}}} is an element of A and exploring the distinctions between elements and subsets.
The discussion is ongoing, with multiple participants expressing their views on the relationship between the elements of A and the proposed element {{{1}}}. Some guidance has been offered regarding the definitions of elements and subsets, but no consensus has been reached.
There is a mention of previous confusion regarding subsets and elements, indicating that participants are grappling with foundational concepts in set theory. One participant notes the inappropriate categorization of the thread under calculus, suggesting a potential misunderstanding of the subject matter.
Dick said:No, it's not in A. You can see the three elements of A. {{{1}}} definitely isn't one of them. Haven't we been through this sort of thing before?
flyingpig said:No that time was confusing subsets and elements
Like (last time) I couldn't figure out why {1} isn't a subset of some set (which I will call B) B = {{1},2,3}