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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 4219 | 1 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 ∈ wcel 2209 ↦ cmpt 4193 |
| 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 4194 df-mpt 4195 |
| This theorem is used by: frecsuc 6683 fodjuomni 7495 fodjumkv 7506 axcaucvg 8273 0tonninf 10897 1tonninf 10898 cbvsum 12150 cbvprod 12349 eirraplem 12568 ballotfilemfc0 13289 ballotfilemfcc 13290 ballotfi 13339 znzrh2 15089 cnmpt12f 15529 fsumcncntop 15810 dvmptfsum 15968 dvef 15970 plyco 16002 plycj 16004 nninfsellemqall 17281 nninfomni 17285 nnnninfex 17288 exmidsbthr 17291 |
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