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Theorem iotabidv 5104
Description: Formula-building deduction for iota. (Contributed by NM, 20-Aug-2011.)
Hypothesis
Ref Expression
iotabidv.1 (𝜑 → (𝜓𝜒))
Assertion
Ref Expression
iotabidv (𝜑 → (℩𝑥𝜓) = (℩𝑥𝜒))
Distinct variable group:   𝜑,𝑥
Allowed substitution hints:   𝜓(𝑥)   𝜒(𝑥)

Proof of Theorem iotabidv
StepHypRef Expression
1 iotabidv.1 . . 3 (𝜑 → (𝜓𝜒))
21alrimiv 1846 . 2 (𝜑 → ∀𝑥(𝜓𝜒))
3 iotabi 5092 . 2 (∀𝑥(𝜓𝜒) → (℩𝑥𝜓) = (℩𝑥𝜒))
42, 3syl 14 1 (𝜑 → (℩𝑥𝜓) = (℩𝑥𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 104  wal 1329   = wceq 1331  cio 5081
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-rex 2420  df-uni 3732  df-iota 5083
This theorem is referenced by:  csbiotag  5111  dffv3g  5410  fveq1  5413  fveq2  5414  fvres  5438  csbfv12g  5450  fvco2  5483  riotaeqdv  5724  riotabidv  5725  riotabidva  5739  ovtposg  6149  shftval  10590  sumeq1  11117  sumeq2  11121  zsumdc  11146  isumclim3  11185  isumshft  11252  prodeq1f  11314  prodeq2w  11318  prodeq2  11319
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