Theorem frrlem16 9654

Description: Lemma for general well-founded recursion. Establish a subset relation. (Contributed by Scott Fenton, 11-Sep-2023.) Revised notion of transitive closure. (Revised by Scott Fenton, 1-Dec-2024.)

Assertion

Ref	Expression
frrlem16	⊢ (((𝑅 Fr 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑧 ∈ 𝐴) → ∀𝑤 ∈ Pred (t++(𝑅 ↾ 𝐴), 𝐴, 𝑧)Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))

Distinct variable groups:   𝑤,𝑅,𝑧   𝑤,𝐴,𝑧

Proof of Theorem frrlem16

Step	Hyp	Ref	Expression
1		predres 6287	. . . . . 6 ⊢ Pred(𝑅, 𝐴, 𝑤) = Pred((𝑅 ↾ 𝐴), 𝐴, 𝑤)
2		relres 5956	. . . . . . . 8 ⊢ Rel (𝑅 ↾ 𝐴)
3		ssttrcl 9611	. . . . . . . 8 ⊢ (Rel (𝑅 ↾ 𝐴) → (𝑅 ↾ 𝐴) ⊆ t++(𝑅 ↾ 𝐴))
4	2, 3	ax-mp 5	. . . . . . 7 ⊢ (𝑅 ↾ 𝐴) ⊆ t++(𝑅 ↾ 𝐴)
5		predrelss 6285	. . . . . . 7 ⊢ ((𝑅 ↾ 𝐴) ⊆ t++(𝑅 ↾ 𝐴) → Pred((𝑅 ↾ 𝐴), 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑤))
6	4, 5	ax-mp 5	. . . . . 6 ⊢ Pred((𝑅 ↾ 𝐴), 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑤)
7	1, 6	eqsstri 3982	. . . . 5 ⊢ Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑤)
8		inss1 4188	. . . . . . . . 9 ⊢ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ⊆ t++(𝑅 ↾ 𝐴)
9		coss1 5798	. . . . . . . . 9 ⊢ ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ⊆ t++(𝑅 ↾ 𝐴) → ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ (t++(𝑅 ↾ 𝐴) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))))
10	8, 9	ax-mp 5	. . . . . . . 8 ⊢ ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ (t++(𝑅 ↾ 𝐴) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)))
11		coss2 5799	. . . . . . . . 9 ⊢ ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ⊆ t++(𝑅 ↾ 𝐴) → (t++(𝑅 ↾ 𝐴) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ (t++(𝑅 ↾ 𝐴) ∘ t++(𝑅 ↾ 𝐴)))
12	8, 11	ax-mp 5	. . . . . . . 8 ⊢ (t++(𝑅 ↾ 𝐴) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ (t++(𝑅 ↾ 𝐴) ∘ t++(𝑅 ↾ 𝐴))
13	10, 12	sstri 3945	. . . . . . 7 ⊢ ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ (t++(𝑅 ↾ 𝐴) ∘ t++(𝑅 ↾ 𝐴))
14		ttrcltr 9612	. . . . . . 7 ⊢ (t++(𝑅 ↾ 𝐴) ∘ t++(𝑅 ↾ 𝐴)) ⊆ t++(𝑅 ↾ 𝐴)
15	13, 14	sstri 3945	. . . . . 6 ⊢ ((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ t++(𝑅 ↾ 𝐴)
16		predtrss 6270	. . . . . 6 ⊢ ((((t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴)) ∘ (t++(𝑅 ↾ 𝐴) ∩ (𝐴 × 𝐴))) ⊆ t++(𝑅 ↾ 𝐴) ∧ 𝑤 ∈ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧) ∧ 𝑧 ∈ 𝐴) → Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))
17	15, 16	mp3an1 1450	. . . . 5 ⊢ ((𝑤 ∈ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧) ∧ 𝑧 ∈ 𝐴) → Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))
18	7, 17	sstrid 3947	. . . 4 ⊢ ((𝑤 ∈ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧) ∧ 𝑧 ∈ 𝐴) → Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))
19	18	ancoms 458	. . 3 ⊢ ((𝑧 ∈ 𝐴 ∧ 𝑤 ∈ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧)) → Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))
20	19	ralrimiva 3121	. 2 ⊢ (𝑧 ∈ 𝐴 → ∀𝑤 ∈ Pred (t++(𝑅 ↾ 𝐴), 𝐴, 𝑧)Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))
21	20	adantl 481	1 ⊢ (((𝑅 Fr 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑧 ∈ 𝐴) → ∀𝑤 ∈ Pred (t++(𝑅 ↾ 𝐴), 𝐴, 𝑧)Pred(𝑅, 𝐴, 𝑤) ⊆ Pred(t++(𝑅 ↾ 𝐴), 𝐴, 𝑧))

Syntax hints:   → wi 4   ∧ wa 395   ∈ wcel 2109  ∀wral 3044   ∩ cin 3902   ⊆ wss 3903   Fr wfr 5569   Se wse 5570   × cxp 5617   ↾ cres 5621   ∘ ccom 5623  Rel wrel 5624  Predcpred 6248  t++cttrcl 9603

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pr 5371  ax-un 7671

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rmo 3343  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-int 4897  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-tr 5200  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6249  df-ord 6310  df-on 6311  df-lim 6312  df-suc 6313  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-riota 7306  df-ov 7352  df-oprab 7353  df-mpo 7354  df-om 7800  df-2nd 7925  df-frecs 8214  df-wrecs 8245  df-recs 8294  df-rdg 8332  df-1o 8388  df-oadd 8392  df-ttrcl 9604

This theorem is referenced by:  frr1  9655