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Mirrors > Home > ILE Home > Th. List > sylan9req | GIF version |
Description: An equality transitivity deduction. (Contributed by NM, 23-Jun-2007.) |
Ref | Expression |
---|---|
sylan9req.1 | ⊢ (𝜑 → 𝐵 = 𝐴) |
sylan9req.2 | ⊢ (𝜓 → 𝐵 = 𝐶) |
Ref | Expression |
---|---|
sylan9req | ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylan9req.1 | . . 3 ⊢ (𝜑 → 𝐵 = 𝐴) | |
2 | 1 | eqcomd 2183 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) |
3 | sylan9req.2 | . 2 ⊢ (𝜓 → 𝐵 = 𝐶) | |
4 | 2, 3 | sylan9eq 2230 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1447 ax-gen 1449 ax-4 1510 ax-17 1526 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-cleq 2170 |
This theorem is referenced by: fndmu 5319 fodmrnu 5448 funcoeqres 5494 fvunsng 5712 prarloclem5 7501 addlocprlemeq 7534 zdiv 9343 resqrexlemnm 11029 fprodssdc 11600 dvdsmulc 11828 cncongrcoprm 12108 mgmidmo 12796 lgsmodeq 14531 |
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