Foundational formalism, more intuitive than ZFC or category theory, by my sometime-officemate David McAllesterhttps://machinethoughts.wordpress.com/2015/01/27/the-foundations-of-mathematics-2/ …
@St_Rev “any function f: σ→𝛕 defines a bag of 𝛕” seems wrong to me. Not sure what he’s getting at there.
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@St_Rev Oh, wait, no, I see. This is actually his main point. He doesn’t mean “defines”; he means “implicitly specifies.” -
@St_Rev Given f: σ→𝛕, there’s an obvious natural induced mapping f: 𝛕→N, the count of how many times an element of 𝛕 appears in range. - 15 more replies
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