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Theorem isf32lem1 9122
Description: Lemma for isfin3-2 9136. Derive weak ordering property. (Contributed by Stefan O'Rear, 5-Nov-2014.)
Hypotheses
Ref Expression
isf32lem.a (𝜑𝐹:ω⟶𝒫 𝐺)
isf32lem.b (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹𝑥))
isf32lem.c (𝜑 → ¬ ran 𝐹 ∈ ran 𝐹)
Assertion
Ref Expression
isf32lem1 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω) ∧ (𝐵𝐴𝜑)) → (𝐹𝐴) ⊆ (𝐹𝐵))
Distinct variable groups:   𝑥,𝐵   𝜑,𝑥   𝑥,𝐴   𝑥,𝐹
Allowed substitution hint:   𝐺(𝑥)

Proof of Theorem isf32lem1
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fveq2 6150 . . . . 5 (𝑎 = 𝐵 → (𝐹𝑎) = (𝐹𝐵))
21sseq1d 3613 . . . 4 (𝑎 = 𝐵 → ((𝐹𝑎) ⊆ (𝐹𝐵) ↔ (𝐹𝐵) ⊆ (𝐹𝐵)))
32imbi2d 330 . . 3 (𝑎 = 𝐵 → ((𝜑 → (𝐹𝑎) ⊆ (𝐹𝐵)) ↔ (𝜑 → (𝐹𝐵) ⊆ (𝐹𝐵))))
4 fveq2 6150 . . . . 5 (𝑎 = 𝑏 → (𝐹𝑎) = (𝐹𝑏))
54sseq1d 3613 . . . 4 (𝑎 = 𝑏 → ((𝐹𝑎) ⊆ (𝐹𝐵) ↔ (𝐹𝑏) ⊆ (𝐹𝐵)))
65imbi2d 330 . . 3 (𝑎 = 𝑏 → ((𝜑 → (𝐹𝑎) ⊆ (𝐹𝐵)) ↔ (𝜑 → (𝐹𝑏) ⊆ (𝐹𝐵))))
7 fveq2 6150 . . . . 5 (𝑎 = suc 𝑏 → (𝐹𝑎) = (𝐹‘suc 𝑏))
87sseq1d 3613 . . . 4 (𝑎 = suc 𝑏 → ((𝐹𝑎) ⊆ (𝐹𝐵) ↔ (𝐹‘suc 𝑏) ⊆ (𝐹𝐵)))
98imbi2d 330 . . 3 (𝑎 = suc 𝑏 → ((𝜑 → (𝐹𝑎) ⊆ (𝐹𝐵)) ↔ (𝜑 → (𝐹‘suc 𝑏) ⊆ (𝐹𝐵))))
10 fveq2 6150 . . . . 5 (𝑎 = 𝐴 → (𝐹𝑎) = (𝐹𝐴))
1110sseq1d 3613 . . . 4 (𝑎 = 𝐴 → ((𝐹𝑎) ⊆ (𝐹𝐵) ↔ (𝐹𝐴) ⊆ (𝐹𝐵)))
1211imbi2d 330 . . 3 (𝑎 = 𝐴 → ((𝜑 → (𝐹𝑎) ⊆ (𝐹𝐵)) ↔ (𝜑 → (𝐹𝐴) ⊆ (𝐹𝐵))))
13 ssid 3605 . . . 4 (𝐹𝐵) ⊆ (𝐹𝐵)
14132a1i 12 . . 3 (𝐵 ∈ ω → (𝜑 → (𝐹𝐵) ⊆ (𝐹𝐵)))
15 isf32lem.b . . . . . . 7 (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹𝑥))
16 suceq 5751 . . . . . . . . . 10 (𝑥 = 𝑏 → suc 𝑥 = suc 𝑏)
1716fveq2d 6154 . . . . . . . . 9 (𝑥 = 𝑏 → (𝐹‘suc 𝑥) = (𝐹‘suc 𝑏))
18 fveq2 6150 . . . . . . . . 9 (𝑥 = 𝑏 → (𝐹𝑥) = (𝐹𝑏))
1917, 18sseq12d 3615 . . . . . . . 8 (𝑥 = 𝑏 → ((𝐹‘suc 𝑥) ⊆ (𝐹𝑥) ↔ (𝐹‘suc 𝑏) ⊆ (𝐹𝑏)))
2019rspcv 3291 . . . . . . 7 (𝑏 ∈ ω → (∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹𝑥) → (𝐹‘suc 𝑏) ⊆ (𝐹𝑏)))
2115, 20syl5 34 . . . . . 6 (𝑏 ∈ ω → (𝜑 → (𝐹‘suc 𝑏) ⊆ (𝐹𝑏)))
2221ad2antrr 761 . . . . 5 (((𝑏 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵𝑏) → (𝜑 → (𝐹‘suc 𝑏) ⊆ (𝐹𝑏)))
23 sstr2 3591 . . . . 5 ((𝐹‘suc 𝑏) ⊆ (𝐹𝑏) → ((𝐹𝑏) ⊆ (𝐹𝐵) → (𝐹‘suc 𝑏) ⊆ (𝐹𝐵)))
2422, 23syl6 35 . . . 4 (((𝑏 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵𝑏) → (𝜑 → ((𝐹𝑏) ⊆ (𝐹𝐵) → (𝐹‘suc 𝑏) ⊆ (𝐹𝐵))))
2524a2d 29 . . 3 (((𝑏 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵𝑏) → ((𝜑 → (𝐹𝑏) ⊆ (𝐹𝐵)) → (𝜑 → (𝐹‘suc 𝑏) ⊆ (𝐹𝐵))))
263, 6, 9, 12, 14, 25findsg 7043 . 2 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵𝐴) → (𝜑 → (𝐹𝐴) ⊆ (𝐹𝐵)))
2726impr 648 1 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω) ∧ (𝐵𝐴𝜑)) → (𝐹𝐴) ⊆ (𝐹𝐵))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 384   = wceq 1480  wcel 1987  wral 2907  wss 3556  𝒫 cpw 4132   cint 4442  ran crn 5077  suc csuc 5686  wf 5845  cfv 5849  ωcom 7015
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4743  ax-nul 4751  ax-pr 4869  ax-un 6905
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-rab 2916  df-v 3188  df-sbc 3419  df-dif 3559  df-un 3561  df-in 3563  df-ss 3570  df-pss 3572  df-nul 3894  df-if 4061  df-pw 4134  df-sn 4151  df-pr 4153  df-tp 4155  df-op 4157  df-uni 4405  df-br 4616  df-opab 4676  df-tr 4715  df-eprel 4987  df-po 4997  df-so 4998  df-fr 5035  df-we 5037  df-ord 5687  df-on 5688  df-lim 5689  df-suc 5690  df-iota 5812  df-fv 5857  df-om 7016
This theorem is referenced by:  isf32lem2  9123  isf32lem3  9124
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