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| Mirrors > Home > ILE Home > Th. List > sbcbii | GIF version | ||
| Description: Formula-building inference for class substitution. (Contributed by NM, 11-Nov-2005.) |
| Ref | Expression |
|---|---|
| sbcbii.1 | ⊢ (𝜑 ↔ 𝜓) |
| Ref | Expression |
|---|---|
| sbcbii | ⊢ ([𝐴 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sbcbii.1 | . . . 4 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (⊤ → (𝜑 ↔ 𝜓)) |
| 3 | 2 | sbcbidv 3091 | . 2 ⊢ (⊤ → ([𝐴 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜓)) |
| 4 | 3 | mptru 1407 | 1 ⊢ ([𝐴 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜓) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ⊤wtru 1399 [wsbc 3032 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-sbc 3033 |
| This theorem is referenced by: eqsbc2 3093 sbc3an 3094 sbccomlem 3107 sbccom 3108 sbcabel 3115 csbco 3138 csbcow 3139 sbcnel12g 3145 sbcne12g 3146 sbccsbg 3157 sbccsb2g 3158 csbnestgf 3181 csbabg 3190 sbcssg 3605 sbcrel 4818 difopab 4869 sbcfung 5357 f1od2 6409 mpoxopovel 6450 bezoutlemnewy 12628 bezoutlemstep 12629 bezoutlemmain 12630 |
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