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Theorem nfso 4302
Description: Bound-variable hypothesis builder for total orders. (Contributed by Stefan O'Rear, 20-Jan-2015.)
Hypotheses
Ref Expression
nfpo.r 𝑥𝑅
nfpo.a 𝑥𝐴
Assertion
Ref Expression
nfso 𝑥 𝑅 Or 𝐴

Proof of Theorem nfso
Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-iso 4297 . 2 (𝑅 Or 𝐴 ↔ (𝑅 Po 𝐴 ∧ ∀𝑎𝐴𝑏𝐴𝑐𝐴 (𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏))))
2 nfpo.r . . . 4 𝑥𝑅
3 nfpo.a . . . 4 𝑥𝐴
42, 3nfpo 4301 . . 3 𝑥 𝑅 Po 𝐴
5 nfcv 2319 . . . . . . . 8 𝑥𝑎
6 nfcv 2319 . . . . . . . 8 𝑥𝑏
75, 2, 6nfbr 4049 . . . . . . 7 𝑥 𝑎𝑅𝑏
8 nfcv 2319 . . . . . . . . 9 𝑥𝑐
95, 2, 8nfbr 4049 . . . . . . . 8 𝑥 𝑎𝑅𝑐
108, 2, 6nfbr 4049 . . . . . . . 8 𝑥 𝑐𝑅𝑏
119, 10nfor 1574 . . . . . . 7 𝑥(𝑎𝑅𝑐𝑐𝑅𝑏)
127, 11nfim 1572 . . . . . 6 𝑥(𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏))
133, 12nfralxy 2515 . . . . 5 𝑥𝑐𝐴 (𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏))
143, 13nfralxy 2515 . . . 4 𝑥𝑏𝐴𝑐𝐴 (𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏))
153, 14nfralxy 2515 . . 3 𝑥𝑎𝐴𝑏𝐴𝑐𝐴 (𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏))
164, 15nfan 1565 . 2 𝑥(𝑅 Po 𝐴 ∧ ∀𝑎𝐴𝑏𝐴𝑐𝐴 (𝑎𝑅𝑏 → (𝑎𝑅𝑐𝑐𝑅𝑏)))
171, 16nfxfr 1474 1 𝑥 𝑅 Or 𝐴
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wo 708  wnf 1460  wnfc 2306  wral 2455   class class class wbr 4003   Po wpo 4294   Or wor 4295
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-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-v 2739  df-un 3133  df-sn 3598  df-pr 3599  df-op 3601  df-br 4004  df-po 4296  df-iso 4297
This theorem is referenced by: (None)
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