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Mirrors > Home > ILE Home > Th. List > pweqi | GIF version |
Description: Equality inference for power class. (Contributed by NM, 27-Nov-2013.) |
Ref | Expression |
---|---|
pweqi.1 | ⊢ 𝐴 = 𝐵 |
Ref | Expression |
---|---|
pweqi | ⊢ 𝒫 𝐴 = 𝒫 𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pweqi.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | pweq 3556 | . 2 ⊢ (𝐴 = 𝐵 → 𝒫 𝐴 = 𝒫 𝐵) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝒫 𝐴 = 𝒫 𝐵 |
Colors of variables: wff set class |
Syntax hints: = wceq 1342 𝒫 cpw 3553 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-11 1493 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-in 3117 df-ss 3124 df-pw 3555 |
This theorem is referenced by: exmidpw 6865 exmidpweq 6866 pw1dom2 7174 pw1ne1 7176 mnfnre 7932 fmelpw1o 13523 |
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