Update infinite-infinities.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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Alexa Amundson
2026-02-27 11:55:36 -06:00
committed by GitHub
parent 50f6f1fdfe
commit 9867f4ddcc

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@@ -25,7 +25,7 @@ of α is also an ordinal.
V₀ = ∅
Vα₊₁ = P(Vα) (power set — one step up)
Vλ = _{α<λ} Vα (limit stage — union over all smaller ranks)
V = _α Vα (the universe of all sets)
V = _α Vα (the universe of all sets; a proper class, not a set in ZFC)
```
**Rank:** Every set x has a rank ρ(x) = the least α such that x ∈ Vα₊₁.