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Theorem sbc3ang 2820
 Description: Distribution of class substitution over triple conjunction. (Contributed by NM, 14-Dec-2006.) (Proof shortened by Andrew Salmon, 29-Jun-2011.)
Assertion
Ref Expression
sbc3ang

Proof of Theorem sbc3ang
Dummy variable is distinct from all other variables.
StepHypRef Expression
1 dfsbcq2 2767 . 2
2 dfsbcq2 2767 . . 3
3 dfsbcq2 2767 . . 3
4 dfsbcq2 2767 . . 3
52, 3, 43anbi123d 1207 . 2
6 sb3an 1832 . 2
71, 5, 6vtoclbg 2614 1
 Colors of variables: wff set class Syntax hints:   wi 4   wb 98   w3a 885   wceq 1243   wcel 1393  wsb 1645  wsbc 2764 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-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-sbc 2765 This theorem is referenced by: (None)
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