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What is 2? (lemmy.blahaj.zone)
submitted 3 months ago* (last edited 3 months ago) by FundMECFSResearch to c/mathmemes

Context:

In ZFC set theory (which most of modern maths is built upon). The natural numbers are defined as recursions of empty sets.

Ie. 0 = ∅ (the empty set)

1 = {∅} = {0}

2 = {∅, {∅}} etc…

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[-] whotookkarl@lemmy.world 1 points 3 months ago* (last edited 3 months ago)

In the spirit of Pedanticus the petty till is rotating/plowing soil before planting, until or a shortened 'til is a preposition up to or before something

this post was submitted on 24 Jun 2025
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