| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > mpteq2ia | GIF version | ||
| Description: An equality inference for the maps-to notation. (Contributed by Mario Carneiro, 16-Dec-2013.) |
| Ref | Expression |
|---|---|
| mpteq2ia.1 | ⊢ (𝑥 ∈ 𝐴 → 𝐵 = 𝐶) |
| Ref | Expression |
|---|---|
| mpteq2ia | ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2238 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | ax-gen 1502 | . 2 ⊢ ∀𝑥 𝐴 = 𝐴 |
| 3 | mpteq2ia.1 | . . 3 ⊢ (𝑥 ∈ 𝐴 → 𝐵 = 𝐶) | |
| 4 | 3 | rgen 2603 | . 2 ⊢ ∀𝑥 ∈ 𝐴 𝐵 = 𝐶 |
| 5 | mpteq12f 4211 | . 2 ⊢ ((∀𝑥 𝐴 = 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝐵 = 𝐶) → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶)) | |
| 6 | 2, 4, 5 | mp2an 430 | 1 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∀wal 1400 = wceq 1402 ∈ wcel 2209 ∀wral 2528 ↦ cmpt 4192 |
| 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-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-ral 2533 df-opab 4193 df-mpt 4194 |
| This theorem is used by: mpteq2i 4218 feqresmpt 5757 elfvmptrab 5802 fmptap 5905 offres 6368 cnrecnv 11692 ege2le3 12457 eirraplem 12563 cnmpt1st 15480 cnmpt2nd 15481 expcn 15761 expcncf 15801 dvexp 15903 dveflem 15918 dvef 15919 elply2 15927 plyid 15938 chtublem 16256 bposlem6 16277 |
| Copyright terms: Public domain | W3C validator |