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Axiom ax-prv3 34008
Description: Third property of three of the provability predicate. (Contributed by BJ, 3-Apr-2019.)
Assertion
Ref Expression
ax-prv3 (Prv 𝜑 → Prv Prv 𝜑)

Detailed syntax breakdown of Axiom ax-prv3
StepHypRef Expression
1 wph . . 3 wff 𝜑
21cprvb 34005 . 2 wff Prv 𝜑
32cprvb 34005 . 2 wff Prv Prv 𝜑
42, 3wi 4 1 wff (Prv 𝜑 → Prv Prv 𝜑)
Colors of variables: wff setvar class
This axiom is referenced by:  bj-babygodel  34011  bj-babylob  34012
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