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Theorem bnj976 30974
Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj976.1 (𝜒 ↔ (𝑁𝐷𝑓 Fn 𝑁𝜑𝜓))
bnj976.2 (𝜑′[𝐺 / 𝑓]𝜑)
bnj976.3 (𝜓′[𝐺 / 𝑓]𝜓)
bnj976.4 (𝜒′[𝐺 / 𝑓]𝜒)
bnj976.5 𝐺 ∈ V
Assertion
Ref Expression
bnj976 (𝜒′ ↔ (𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′))
Distinct variable groups:   𝐷,𝑓   𝑓,𝑁
Allowed substitution hints:   𝜑(𝑓)   𝜓(𝑓)   𝜒(𝑓)   𝐺(𝑓)   𝜑′(𝑓)   𝜓′(𝑓)   𝜒′(𝑓)

Proof of Theorem bnj976
Dummy variable is distinct from all other variables.
StepHypRef Expression
1 bnj976.4 . 2 (𝜒′[𝐺 / 𝑓]𝜒)
2 sbcco 3491 . 2 ([𝐺 / ][ / 𝑓]𝜒[𝐺 / 𝑓]𝜒)
3 bnj976.5 . . 3 𝐺 ∈ V
4 bnj252 30897 . . . . . 6 ((𝑁𝐷𝑓 Fn 𝑁𝜑𝜓) ↔ (𝑁𝐷 ∧ (𝑓 Fn 𝑁𝜑𝜓)))
54sbcbii 3524 . . . . 5 ([ / 𝑓](𝑁𝐷𝑓 Fn 𝑁𝜑𝜓) ↔ [ / 𝑓](𝑁𝐷 ∧ (𝑓 Fn 𝑁𝜑𝜓)))
6 bnj976.1 . . . . . 6 (𝜒 ↔ (𝑁𝐷𝑓 Fn 𝑁𝜑𝜓))
76sbcbii 3524 . . . . 5 ([ / 𝑓]𝜒[ / 𝑓](𝑁𝐷𝑓 Fn 𝑁𝜑𝜓))
8 vex 3234 . . . . . . . 8 ∈ V
98bnj525 30933 . . . . . . 7 ([ / 𝑓]𝑁𝐷𝑁𝐷)
10 sbc3an 3527 . . . . . . . 8 ([ / 𝑓](𝑓 Fn 𝑁𝜑𝜓) ↔ ([ / 𝑓]𝑓 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓))
11 bnj62 30914 . . . . . . . . 9 ([ / 𝑓]𝑓 Fn 𝑁 Fn 𝑁)
12113anbi1i 1272 . . . . . . . 8 (([ / 𝑓]𝑓 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓) ↔ ( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓))
1310, 12bitri 264 . . . . . . 7 ([ / 𝑓](𝑓 Fn 𝑁𝜑𝜓) ↔ ( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓))
149, 13anbi12i 733 . . . . . 6 (([ / 𝑓]𝑁𝐷[ / 𝑓](𝑓 Fn 𝑁𝜑𝜓)) ↔ (𝑁𝐷 ∧ ( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓)))
15 sbcan 3511 . . . . . 6 ([ / 𝑓](𝑁𝐷 ∧ (𝑓 Fn 𝑁𝜑𝜓)) ↔ ([ / 𝑓]𝑁𝐷[ / 𝑓](𝑓 Fn 𝑁𝜑𝜓)))
16 bnj252 30897 . . . . . 6 ((𝑁𝐷 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓) ↔ (𝑁𝐷 ∧ ( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓)))
1714, 15, 163bitr4ri 293 . . . . 5 ((𝑁𝐷 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓) ↔ [ / 𝑓](𝑁𝐷 ∧ (𝑓 Fn 𝑁𝜑𝜓)))
185, 7, 173bitr4i 292 . . . 4 ([ / 𝑓]𝜒 ↔ (𝑁𝐷 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓))
19 fneq1 6017 . . . . . . 7 ( = 𝐺 → ( Fn 𝑁𝐺 Fn 𝑁))
20 sbceq1a 3479 . . . . . . . 8 ( = 𝐺 → ([ / 𝑓]𝜑[𝐺 / ][ / 𝑓]𝜑))
21 bnj976.2 . . . . . . . . 9 (𝜑′[𝐺 / 𝑓]𝜑)
22 sbcco 3491 . . . . . . . . 9 ([𝐺 / ][ / 𝑓]𝜑[𝐺 / 𝑓]𝜑)
2321, 22bitr4i 267 . . . . . . . 8 (𝜑′[𝐺 / ][ / 𝑓]𝜑)
2420, 23syl6bbr 278 . . . . . . 7 ( = 𝐺 → ([ / 𝑓]𝜑𝜑′))
25 sbceq1a 3479 . . . . . . . 8 ( = 𝐺 → ([ / 𝑓]𝜓[𝐺 / ][ / 𝑓]𝜓))
26 bnj976.3 . . . . . . . . 9 (𝜓′[𝐺 / 𝑓]𝜓)
27 sbcco 3491 . . . . . . . . 9 ([𝐺 / ][ / 𝑓]𝜓[𝐺 / 𝑓]𝜓)
2826, 27bitr4i 267 . . . . . . . 8 (𝜓′[𝐺 / ][ / 𝑓]𝜓)
2925, 28syl6bbr 278 . . . . . . 7 ( = 𝐺 → ([ / 𝑓]𝜓𝜓′))
3019, 24, 293anbi123d 1439 . . . . . 6 ( = 𝐺 → (( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓) ↔ (𝐺 Fn 𝑁𝜑′𝜓′)))
3130anbi2d 740 . . . . 5 ( = 𝐺 → ((𝑁𝐷 ∧ ( Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓)) ↔ (𝑁𝐷 ∧ (𝐺 Fn 𝑁𝜑′𝜓′))))
32 bnj252 30897 . . . . 5 ((𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′) ↔ (𝑁𝐷 ∧ (𝐺 Fn 𝑁𝜑′𝜓′)))
3331, 16, 323bitr4g 303 . . . 4 ( = 𝐺 → ((𝑁𝐷 Fn 𝑁[ / 𝑓]𝜑[ / 𝑓]𝜓) ↔ (𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′)))
3418, 33syl5bb 272 . . 3 ( = 𝐺 → ([ / 𝑓]𝜒 ↔ (𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′)))
353, 34sbcie 3503 . 2 ([𝐺 / ][ / 𝑓]𝜒 ↔ (𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′))
361, 2, 353bitr2i 288 1 (𝜒′ ↔ (𝑁𝐷𝐺 Fn 𝑁𝜑′𝜓′))
Colors of variables: wff setvar class
Syntax hints:  wb 196  wa 383  w3a 1054   = wceq 1523  wcel 2030  Vcvv 3231  [wsbc 3468   Fn wfn 5921  w-bnj17 30880
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-rab 2950  df-v 3233  df-sbc 3469  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-br 4686  df-opab 4746  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-fun 5928  df-fn 5929  df-bnj17 30881
This theorem is referenced by:  bnj910  31144  bnj999  31153  bnj907  31161
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