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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 3104 | . 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 3045 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-sbc 3046 |
| This theorem is referenced by: eqsbc2 3106 sbc3an 3107 sbccomlem 3120 sbccom 3121 sbcabel 3128 csbco 3151 csbcow 3152 sbcnel12g 3158 sbcne12g 3159 sbccsbg 3170 sbccsb2g 3171 csbnestgf 3194 csbabg 3203 sbcssg 3622 sbcrel 4841 difopab 4893 sbcfung 5381 f1od2 6444 mpoxopovel 6485 bezoutlemnewy 12717 bezoutlemstep 12718 bezoutlemmain 12719 |
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