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Mirrors > Home > MPE Home > Th. List > alrot3 | Structured version Visualization version GIF version |
Description: Theorem *11.21 in [WhiteheadRussell] p. 160. (Contributed by Andrew Salmon, 24-May-2011.) |
Ref | Expression |
---|---|
alrot3 | ⊢ (∀𝑥∀𝑦∀𝑧𝜑 ↔ ∀𝑦∀𝑧∀𝑥𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | alcom 2077 | . 2 ⊢ (∀𝑥∀𝑦∀𝑧𝜑 ↔ ∀𝑦∀𝑥∀𝑧𝜑) | |
2 | alcom 2077 | . . 3 ⊢ (∀𝑥∀𝑧𝜑 ↔ ∀𝑧∀𝑥𝜑) | |
3 | 2 | albii 1787 | . 2 ⊢ (∀𝑦∀𝑥∀𝑧𝜑 ↔ ∀𝑦∀𝑧∀𝑥𝜑) |
4 | 1, 3 | bitri 264 | 1 ⊢ (∀𝑥∀𝑦∀𝑧𝜑 ↔ ∀𝑦∀𝑧∀𝑥𝜑) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 196 ∀wal 1521 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-11 2074 |
This theorem depends on definitions: df-bi 197 |
This theorem is referenced by: alrot4 2079 nfnid 4927 raliunxp 5294 dff13 6552 cosscnvssid3 34366 undmrnresiss 38227 ntrneikb 38709 ntrneixb 38710 |
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