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Mirrors > Home > NFE Home > Th. List > com4t | GIF version |
Description: Commutation of antecedents. Rotate twice. (Contributed by NM, 25-Apr-1994.) |
Ref | Expression |
---|---|
com4.1 | ⊢ (φ → (ψ → (χ → (θ → τ)))) |
Ref | Expression |
---|---|
com4t | ⊢ (χ → (θ → (φ → (ψ → τ)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | com4.1 | . . 3 ⊢ (φ → (ψ → (χ → (θ → τ)))) | |
2 | 1 | com4l 78 | . 2 ⊢ (ψ → (χ → (θ → (φ → τ)))) |
3 | 2 | com4l 78 | 1 ⊢ (χ → (θ → (φ → (ψ → τ)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 8 |
This theorem is referenced by: com4r 80 com24 81 mopick 2266 |
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