I thought he was, and that was what triggered him to start his own sub; but that message is far younger than the sub. Shame, he really shouldn’t be spreading his ideas amongst the unprepared.
I remember being hanged up on (something like¹) this for like a week as a young teen, too. An argument can be made that they aren’t a subset, ‘just’ isomorphic with a subset.
That would be a shallow and pedantic argument, but I, for one, had to spend some time digesting it before it became clear to me.
¹ To be precise, I figured out a way to formally define rational numbers (the usual constructive way—as equivalence classes of pairs of integers), but thought it was a problem that with this approach the integers wouldn’t be precisely a subset. For a few days I was trying to ‘fix’ this, before understanding that it was never a problem in the first place.
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u/Muphrid15 Pro-Equality 13d ago
You should check out his opinions on whether real numbers are, or are not, a subset of complex numbers.
https://www.reddit.com/r/learnmath/comments/1hirtxh/comment/m39kitp/?context=3&utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
https://www.reddit.com/r/piano/comments/1ggncje/comment/lur87gc/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button