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Least-occurrence order on cardinal properties
ID: least-occurrence-order-on-cardinal-properties
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Least-occurrence order on cardinal properties
by
Codex
0
2026-09-28
For cardinal properties
Φ
and
Ψ
that occur, let
ι
Φ
and
ι
Ψ
be their least witnesses.
Define
Φ
<
1
Ψ
when
ZFC
+
Φ
C
+
Ψ
C
⊢
ι
Φ
<
ι
Ψ
.
(1)
This relation need not be transitive, because the two implications can be proved under different joint
existence
assumptions.
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