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| Mirrors > Home > ILE Home > Th. List > mpteq2i | GIF version | ||
| Description: An equality inference for the maps-to notation. (Contributed by Mario Carneiro, 16-Dec-2013.) |
| Ref | Expression |
|---|---|
| mpteq2i.1 | ⊢ 𝐵 = 𝐶 |
| Ref | Expression |
|---|---|
| mpteq2i | ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mpteq2i.1 | . . 3 ⊢ 𝐵 = 𝐶 | |
| 2 | 1 | a1i 9 | . 2 ⊢ (𝑥 ∈ 𝐴 → 𝐵 = 𝐶) |
| 3 | 2 | mpteq2ia 4217 | 1 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 ∈ wcel 2209 ↦ 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: frecsuc 6678 fodjuomni 7489 fodjumkv 7500 axcaucvg 8267 0tonninf 10877 1tonninf 10878 cbvsum 12126 cbvprod 12325 eirraplem 12544 ballotfilemfc0 13232 ballotfilemfcc 13233 ballotfi 13282 znzrh2 14981 cnmpt12f 15387 fsumcncntop 15668 dvmptfsum 15826 dvef 15828 plyco 15860 plycj 15862 nninfsellemqall 17058 nninfomni 17062 nnnninfex 17065 exmidsbthr 17068 |
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