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Mirrors > Home > MPE Home > Th. List > truimtru | Structured version Visualization version GIF version |
Description: A → identity. (Contributed by Anthony Hart, 22-Oct-2010.) |
Ref | Expression |
---|---|
truimtru | ⊢ ((⊤ → ⊤) ↔ ⊤) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . 2 ⊢ (⊤ → ⊤) | |
2 | 1 | bitru 1496 | 1 ⊢ ((⊤ → ⊤) ↔ ⊤) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ⊤wtru 1484 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 197 df-tru 1486 |
This theorem is referenced by: (None) |
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