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Theorem wl-section-prop 33607
Description: Intuitionistic logic is now developed separately, so we need not first focus on intuitionally valid axioms ax-1 6 and ax-2 7 any longer.

Alternatively, I start from Jan Lukasiewicz's axiom system here, i.e. ax-mp 5, ax-luk1 33608, ax-luk2 33609 and ax-luk3 33610. I rather copy this system than use luk-1 1750 to luk-3 1752, since the latter are theorems, while we need axioms here.

(Contributed by Wolf Lammen, 23-Feb-2018.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypothesis
Ref Expression
wl-section-prop.hyp 𝜑
Assertion
Ref Expression
wl-section-prop 𝜑

Proof of Theorem wl-section-prop
StepHypRef Expression
1 wl-section-prop.hyp 1 𝜑
Colors of variables: wff setvar class
This theorem is referenced by: (None)
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