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Theorem sbiedv 2408
Description: Conversion of implicit substitution to explicit substitution (deduction version of sbie 2406). (Contributed by NM, 7-Jan-2017.)
Hypothesis
Ref Expression
sbiedv.1 ((𝜑𝑥 = 𝑦) → (𝜓𝜒))
Assertion
Ref Expression
sbiedv (𝜑 → ([𝑦 / 𝑥]𝜓𝜒))
Distinct variable groups:   𝜑,𝑥   𝜒,𝑥
Allowed substitution hints:   𝜑(𝑦)   𝜓(𝑥,𝑦)   𝜒(𝑦)

Proof of Theorem sbiedv
StepHypRef Expression
1 nfv 1841 . 2 𝑥𝜑
2 nfvd 1842 . 2 (𝜑 → Ⅎ𝑥𝜒)
3 sbiedv.1 . . 3 ((𝜑𝑥 = 𝑦) → (𝜓𝜒))
43ex 450 . 2 (𝜑 → (𝑥 = 𝑦 → (𝜓𝜒)))
51, 2, 4sbied 2407 1 (𝜑 → ([𝑦 / 𝑥]𝜓𝜒))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  [wsb 1878
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1720  ax-4 1735  ax-5 1837  ax-6 1886  ax-7 1933  ax-10 2017  ax-12 2045  ax-13 2244
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-ex 1703  df-nf 1708  df-sb 1879
This theorem is referenced by:  2mos  2550  iscatd2  16323  prtlem5  33963
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