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Theorem cbvrabcsf 2911
 Description: A more general version of cbvrab 2555 with no distinct variable restrictions. (Contributed by Andrew Salmon, 13-Jul-2011.)
Hypotheses
Ref Expression
cbvralcsf.1 𝑦𝐴
cbvralcsf.2 𝑥𝐵
cbvralcsf.3 𝑦𝜑
cbvralcsf.4 𝑥𝜓
cbvralcsf.5 (𝑥 = 𝑦𝐴 = 𝐵)
cbvralcsf.6 (𝑥 = 𝑦 → (𝜑𝜓))
Assertion
Ref Expression
cbvrabcsf {𝑥𝐴𝜑} = {𝑦𝐵𝜓}

Proof of Theorem cbvrabcsf
Dummy variables 𝑣 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nfv 1421 . . . 4 𝑧(𝑥𝐴𝜑)
2 nfcsb1v 2882 . . . . . 6 𝑥𝑧 / 𝑥𝐴
32nfcri 2172 . . . . 5 𝑥 𝑧𝑧 / 𝑥𝐴
4 nfs1v 1815 . . . . 5 𝑥[𝑧 / 𝑥]𝜑
53, 4nfan 1457 . . . 4 𝑥(𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑)
6 id 19 . . . . . 6 (𝑥 = 𝑧𝑥 = 𝑧)
7 csbeq1a 2860 . . . . . 6 (𝑥 = 𝑧𝐴 = 𝑧 / 𝑥𝐴)
86, 7eleq12d 2108 . . . . 5 (𝑥 = 𝑧 → (𝑥𝐴𝑧𝑧 / 𝑥𝐴))
9 sbequ12 1654 . . . . 5 (𝑥 = 𝑧 → (𝜑 ↔ [𝑧 / 𝑥]𝜑))
108, 9anbi12d 442 . . . 4 (𝑥 = 𝑧 → ((𝑥𝐴𝜑) ↔ (𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑)))
111, 5, 10cbvab 2160 . . 3 {𝑥 ∣ (𝑥𝐴𝜑)} = {𝑧 ∣ (𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑)}
12 nfcv 2178 . . . . . . 7 𝑦𝑧
13 cbvralcsf.1 . . . . . . 7 𝑦𝐴
1412, 13nfcsb 2884 . . . . . 6 𝑦𝑧 / 𝑥𝐴
1514nfcri 2172 . . . . 5 𝑦 𝑧𝑧 / 𝑥𝐴
16 cbvralcsf.3 . . . . . 6 𝑦𝜑
1716nfsb 1822 . . . . 5 𝑦[𝑧 / 𝑥]𝜑
1815, 17nfan 1457 . . . 4 𝑦(𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑)
19 nfv 1421 . . . 4 𝑧(𝑦𝐵𝜓)
20 id 19 . . . . . 6 (𝑧 = 𝑦𝑧 = 𝑦)
21 csbeq1 2855 . . . . . . 7 (𝑧 = 𝑦𝑧 / 𝑥𝐴 = 𝑦 / 𝑥𝐴)
22 df-csb 2853 . . . . . . . 8 𝑦 / 𝑥𝐴 = {𝑣[𝑦 / 𝑥]𝑣𝐴}
23 cbvralcsf.2 . . . . . . . . . . . 12 𝑥𝐵
2423nfcri 2172 . . . . . . . . . . 11 𝑥 𝑣𝐵
25 cbvralcsf.5 . . . . . . . . . . . 12 (𝑥 = 𝑦𝐴 = 𝐵)
2625eleq2d 2107 . . . . . . . . . . 11 (𝑥 = 𝑦 → (𝑣𝐴𝑣𝐵))
2724, 26sbie 1674 . . . . . . . . . 10 ([𝑦 / 𝑥]𝑣𝐴𝑣𝐵)
28 sbsbc 2768 . . . . . . . . . 10 ([𝑦 / 𝑥]𝑣𝐴[𝑦 / 𝑥]𝑣𝐴)
2927, 28bitr3i 175 . . . . . . . . 9 (𝑣𝐵[𝑦 / 𝑥]𝑣𝐴)
3029abbi2i 2152 . . . . . . . 8 𝐵 = {𝑣[𝑦 / 𝑥]𝑣𝐴}
3122, 30eqtr4i 2063 . . . . . . 7 𝑦 / 𝑥𝐴 = 𝐵
3221, 31syl6eq 2088 . . . . . 6 (𝑧 = 𝑦𝑧 / 𝑥𝐴 = 𝐵)
3320, 32eleq12d 2108 . . . . 5 (𝑧 = 𝑦 → (𝑧𝑧 / 𝑥𝐴𝑦𝐵))
34 sbequ 1721 . . . . . 6 (𝑧 = 𝑦 → ([𝑧 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
35 cbvralcsf.4 . . . . . . 7 𝑥𝜓
36 cbvralcsf.6 . . . . . . 7 (𝑥 = 𝑦 → (𝜑𝜓))
3735, 36sbie 1674 . . . . . 6 ([𝑦 / 𝑥]𝜑𝜓)
3834, 37syl6bb 185 . . . . 5 (𝑧 = 𝑦 → ([𝑧 / 𝑥]𝜑𝜓))
3933, 38anbi12d 442 . . . 4 (𝑧 = 𝑦 → ((𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑) ↔ (𝑦𝐵𝜓)))
4018, 19, 39cbvab 2160 . . 3 {𝑧 ∣ (𝑧𝑧 / 𝑥𝐴 ∧ [𝑧 / 𝑥]𝜑)} = {𝑦 ∣ (𝑦𝐵𝜓)}
4111, 40eqtri 2060 . 2 {𝑥 ∣ (𝑥𝐴𝜑)} = {𝑦 ∣ (𝑦𝐵𝜓)}
42 df-rab 2315 . 2 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
43 df-rab 2315 . 2 {𝑦𝐵𝜓} = {𝑦 ∣ (𝑦𝐵𝜓)}
4441, 42, 433eqtr4i 2070 1 {𝑥𝐴𝜑} = {𝑦𝐵𝜓}
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 97   ↔ wb 98   = wceq 1243  Ⅎwnf 1349   ∈ wcel 1393  [wsb 1645  {cab 2026  Ⅎwnfc 2165  {crab 2310  [wsbc 2764  ⦋csb 2852 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022 This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-rab 2315  df-sbc 2765  df-csb 2853 This theorem is referenced by: (None)
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