| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > feq3d | GIF version | ||
| Description: Equality deduction for functions. (Contributed by AV, 1-Jan-2020.) |
| Ref | Expression |
|---|---|
| feq2d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| feq3d | ⊢ (𝜑 → (𝐹:𝑋⟶𝐴 ↔ 𝐹:𝑋⟶𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq2d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | feq3 5518 | . 2 ⊢ (𝐴 = 𝐵 → (𝐹:𝑋⟶𝐴 ↔ 𝐹:𝑋⟶𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐹:𝑋⟶𝐴 ↔ 𝐹:𝑋⟶𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ⟶wf 5373 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-f 5381 |
| This theorem is used by: gzsumress 13765 resmhm2b 13849 isghm 14099 gsumvalfi 14236 gsumressfi 14251 uptx 15466 txcn 15467 dvply2g 15958 lgseisenlem3 16362 lgseisenlem4 16363 uhgr0vb 16496 uhgrun 16498 upgrun 16538 umgrun 16540 wksfval 16734 wlkres 16791 |
| Copyright terms: Public domain | W3C validator |