Theorem frecsuclem 6650

Description: Lemma for frecsuc 6651. Just giving a name to a common expression to simplify the proof. (Contributed by Jim Kingdon, 29-Mar-2022.)

Hypothesis

Ref	Expression
frecsuclem.g	⊢ 𝐺 = (𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))})

Assertion

Ref	Expression
frecsuclem	⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘(frec(𝐹, 𝐴)‘𝐵)))

Distinct variable groups:   𝐴,𝑔,𝑚,𝑥   𝐵,𝑔,𝑚,𝑥   𝑔,𝐹,𝑚,𝑥   𝑧,𝐹,𝑚,𝑥   𝑔,𝐺,𝑚,𝑥   𝑆,𝑚,𝑥,𝑧

Allowed substitution hints:   𝐴(𝑧)   𝐵(𝑧)   𝑆(𝑔)   𝐺(𝑧)

Proof of Theorem frecsuclem

Dummy variables 𝑓 𝑤 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-frec 6635	. . . . . . . . . . . . 13 ⊢ frec(𝐹, 𝐴) = (recs((𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))})) ↾ ω)
2		frecsuclem.g	. . . . . . . . . . . . . . 15 ⊢ 𝐺 = (𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))})
3		recseq 6550	. . . . . . . . . . . . . . 15 ⊢ (𝐺 = (𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))}) → recs(𝐺) = recs((𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))})))
4	2, 3	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ recs(𝐺) = recs((𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))}))
5	4	reseq1i 5039	. . . . . . . . . . . . 13 ⊢ (recs(𝐺) ↾ ω) = (recs((𝑔 ∈ V ↦ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))})) ↾ ω)
6	1, 5	eqtr4i 2258	. . . . . . . . . . . 12 ⊢ frec(𝐹, 𝐴) = (recs(𝐺) ↾ ω)
7	6	fveq1i 5676	. . . . . . . . . . 11 ⊢ (frec(𝐹, 𝐴)‘suc 𝐵) = ((recs(𝐺) ↾ ω)‘suc 𝐵)
8		peano2 4722	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ ω → suc 𝐵 ∈ ω)
9		fvres 5699	. . . . . . . . . . . 12 ⊢ (suc 𝐵 ∈ ω → ((recs(𝐺) ↾ ω)‘suc 𝐵) = (recs(𝐺)‘suc 𝐵))
10	8, 9	syl 14	. . . . . . . . . . 11 ⊢ (𝐵 ∈ ω → ((recs(𝐺) ↾ ω)‘suc 𝐵) = (recs(𝐺)‘suc 𝐵))
11	7, 10	eqtrid 2279	. . . . . . . . . 10 ⊢ (𝐵 ∈ ω → (frec(𝐹, 𝐴)‘suc 𝐵) = (recs(𝐺)‘suc 𝐵))
12	11	3ad2ant3 1047	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = (recs(𝐺)‘suc 𝐵))
13		eqid 2234	. . . . . . . . . . 11 ⊢ recs(𝐺) = recs(𝐺)
14	2	funmpt2 5396	. . . . . . . . . . . 12 ⊢ Fun 𝐺
15	14	a1i 9	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → Fun 𝐺)
16		ordom 4734	. . . . . . . . . . . 12 ⊢ Ord ω
17	16	a1i 9	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → Ord ω)
18		vex 2818	. . . . . . . . . . . . . 14 ⊢ 𝑓 ∈ V
19	18	a1i 9	. . . . . . . . . . . . 13 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → 𝑓 ∈ V)
20		simp2 1025	. . . . . . . . . . . . . 14 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → 𝑦 ∈ ω)
21		simp3 1026	. . . . . . . . . . . . . 14 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → 𝑓:𝑦⟶𝑆)
22		simp11 1054	. . . . . . . . . . . . . . 15 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → ∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆)
23		fveq2 5675	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = 𝑤 → (𝐹‘𝑧) = (𝐹‘𝑤))
24	23	eleq1d 2303	. . . . . . . . . . . . . . . 16 ⊢ (𝑧 = 𝑤 → ((𝐹‘𝑧) ∈ 𝑆 ↔ (𝐹‘𝑤) ∈ 𝑆))
25	24	cbvralv 2780	. . . . . . . . . . . . . . 15 ⊢ (∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ↔ ∀𝑤 ∈ 𝑆 (𝐹‘𝑤) ∈ 𝑆)
26	22, 25	sylib 122	. . . . . . . . . . . . . 14 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → ∀𝑤 ∈ 𝑆 (𝐹‘𝑤) ∈ 𝑆)
27		simp12 1055	. . . . . . . . . . . . . 14 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → 𝐴 ∈ 𝑆)
28	20, 21, 26, 27	frecabcl 6643	. . . . . . . . . . . . 13 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))} ∈ 𝑆)
29		dmeq 4961	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑔 = 𝑓 → dom 𝑔 = dom 𝑓)
30	29	eqeq1d 2243	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑔 = 𝑓 → (dom 𝑔 = suc 𝑚 ↔ dom 𝑓 = suc 𝑚))
31		fveq1 5674	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑔 = 𝑓 → (𝑔‘𝑚) = (𝑓‘𝑚))
32	31	fveq2d 5679	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑔 = 𝑓 → (𝐹‘(𝑔‘𝑚)) = (𝐹‘(𝑓‘𝑚)))
33	32	eleq2d 2304	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑔 = 𝑓 → (𝑥 ∈ (𝐹‘(𝑔‘𝑚)) ↔ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))))
34	30, 33	anbi12d 473	. . . . . . . . . . . . . . . . 17 ⊢ (𝑔 = 𝑓 → ((dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ↔ (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚)))))
35	34	rexbidv 2545	. . . . . . . . . . . . . . . 16 ⊢ (𝑔 = 𝑓 → (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ↔ ∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚)))))
36	29	eqeq1d 2243	. . . . . . . . . . . . . . . . 17 ⊢ (𝑔 = 𝑓 → (dom 𝑔 = ∅ ↔ dom 𝑓 = ∅))
37	36	anbi1d 465	. . . . . . . . . . . . . . . 16 ⊢ (𝑔 = 𝑓 → ((dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴) ↔ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴)))
38	35, 37	orbi12d 801	. . . . . . . . . . . . . . 15 ⊢ (𝑔 = 𝑓 → ((∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴)) ↔ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))))
39	38	abbidv 2354	. . . . . . . . . . . . . 14 ⊢ (𝑔 = 𝑓 → {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))} = {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))})
40	39, 2	fvmptg 5758	. . . . . . . . . . . . 13 ⊢ ((𝑓 ∈ V ∧ {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))} ∈ 𝑆) → (𝐺‘𝑓) = {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))})
41	19, 28, 40	syl2anc 411	. . . . . . . . . . . 12 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → (𝐺‘𝑓) = {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑓 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑓‘𝑚))) ∨ (dom 𝑓 = ∅ ∧ 𝑥 ∈ 𝐴))})
42	41, 28	eqeltrd 2311	. . . . . . . . . . 11 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ω ∧ 𝑓:𝑦⟶𝑆) → (𝐺‘𝑓) ∈ 𝑆)
43		limom 4741	. . . . . . . . . . . . . . 15 ⊢ Lim ω
44		limuni 4522	. . . . . . . . . . . . . . 15 ⊢ (Lim ω → ω = ∪ ω)
45	43, 44	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ ω = ∪ ω
46	45	eleq2i 2301	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ω ↔ 𝑦 ∈ ∪ ω)
47		peano2 4722	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ω → suc 𝑦 ∈ ω)
48	46, 47	sylbir 135	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ ∪ ω → suc 𝑦 ∈ ω)
49	48	adantl 277	. . . . . . . . . . 11 ⊢ (((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) ∧ 𝑦 ∈ ∪ ω) → suc 𝑦 ∈ ω)
50	45	eleq2i 2301	. . . . . . . . . . . . 13 ⊢ (suc 𝐵 ∈ ω ↔ suc 𝐵 ∈ ∪ ω)
51	8, 50	sylib 122	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ ω → suc 𝐵 ∈ ∪ ω)
52	51	3ad2ant3 1047	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → suc 𝐵 ∈ ∪ ω)
53	13, 15, 17, 42, 49, 52	tfrcldm 6607	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → suc 𝐵 ∈ dom recs(𝐺))
54	13	tfr2a 6565	. . . . . . . . . 10 ⊢ (suc 𝐵 ∈ dom recs(𝐺) → (recs(𝐺)‘suc 𝐵) = (𝐺‘(recs(𝐺) ↾ suc 𝐵)))
55	53, 54	syl 14	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (recs(𝐺)‘suc 𝐵) = (𝐺‘(recs(𝐺) ↾ suc 𝐵)))
56	12, 55	eqtrd 2267	. . . . . . . 8 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = (𝐺‘(recs(𝐺) ↾ suc 𝐵)))
57		tfrfun 6564	. . . . . . . . . . 11 ⊢ Fun recs(𝐺)
58	57	a1i 9	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → Fun recs(𝐺))
59	8	3ad2ant3 1047	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → suc 𝐵 ∈ ω)
60		resfunexg 5910	. . . . . . . . . 10 ⊢ ((Fun recs(𝐺) ∧ suc 𝐵 ∈ ω) → (recs(𝐺) ↾ suc 𝐵) ∈ V)
61	58, 59, 60	syl2anc 411	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (recs(𝐺) ↾ suc 𝐵) ∈ V)
62		frecfcl 6649	. . . . . . . . . . . . 13 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆) → frec(𝐹, 𝐴):ω⟶𝑆)
63	6	feq1i 5506	. . . . . . . . . . . . 13 ⊢ (frec(𝐹, 𝐴):ω⟶𝑆 ↔ (recs(𝐺) ↾ ω):ω⟶𝑆)
64	62, 63	sylib 122	. . . . . . . . . . . 12 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆) → (recs(𝐺) ↾ ω):ω⟶𝑆)
65	64	3adant3 1044	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (recs(𝐺) ↾ ω):ω⟶𝑆)
66		simp3 1026	. . . . . . . . . . . 12 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → 𝐵 ∈ ω)
67		ordelsuc 4632	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ω ∧ Ord ω) → (𝐵 ∈ ω ↔ suc 𝐵 ⊆ ω))
68	16, 67	mpan2 425	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ω → (𝐵 ∈ ω ↔ suc 𝐵 ⊆ ω))
69	68	3ad2ant3 1047	. . . . . . . . . . . 12 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝐵 ∈ ω ↔ suc 𝐵 ⊆ ω))
70	66, 69	mpbid 147	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → suc 𝐵 ⊆ ω)
71		fssres2 5547	. . . . . . . . . . 11 ⊢ (((recs(𝐺) ↾ ω):ω⟶𝑆 ∧ suc 𝐵 ⊆ ω) → (recs(𝐺) ↾ suc 𝐵):suc 𝐵⟶𝑆)
72	65, 70, 71	syl2anc 411	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (recs(𝐺) ↾ suc 𝐵):suc 𝐵⟶𝑆)
73		simp1 1024	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆)
74	73, 25	sylib 122	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ∀𝑤 ∈ 𝑆 (𝐹‘𝑤) ∈ 𝑆)
75		simp2 1025	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → 𝐴 ∈ 𝑆)
76	59, 72, 74, 75	frecabcl 6643	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))} ∈ 𝑆)
77		dmeq 4961	. . . . . . . . . . . . . . 15 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → dom 𝑔 = dom (recs(𝐺) ↾ suc 𝐵))
78	77	eqeq1d 2243	. . . . . . . . . . . . . 14 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (dom 𝑔 = suc 𝑚 ↔ dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚))
79		fveq1 5674	. . . . . . . . . . . . . . . 16 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (𝑔‘𝑚) = ((recs(𝐺) ↾ suc 𝐵)‘𝑚))
80	79	fveq2d 5679	. . . . . . . . . . . . . . 15 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (𝐹‘(𝑔‘𝑚)) = (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))
81	80	eleq2d 2304	. . . . . . . . . . . . . 14 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (𝑥 ∈ (𝐹‘(𝑔‘𝑚)) ↔ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))))
82	78, 81	anbi12d 473	. . . . . . . . . . . . 13 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → ((dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ↔ (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))))
83	82	rexbidv 2545	. . . . . . . . . . . 12 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ↔ ∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))))
84	77	eqeq1d 2243	. . . . . . . . . . . . 13 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → (dom 𝑔 = ∅ ↔ dom (recs(𝐺) ↾ suc 𝐵) = ∅))
85	84	anbi1d 465	. . . . . . . . . . . 12 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → ((dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴) ↔ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴)))
86	83, 85	orbi12d 801	. . . . . . . . . . 11 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → ((∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴)) ↔ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))))
87	86	abbidv 2354	. . . . . . . . . 10 ⊢ (𝑔 = (recs(𝐺) ↾ suc 𝐵) → {𝑥 ∣ (∃𝑚 ∈ ω (dom 𝑔 = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘(𝑔‘𝑚))) ∨ (dom 𝑔 = ∅ ∧ 𝑥 ∈ 𝐴))} = {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))})
88	87, 2	fvmptg 5758	. . . . . . . . 9 ⊢ (((recs(𝐺) ↾ suc 𝐵) ∈ V ∧ {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))} ∈ 𝑆) → (𝐺‘(recs(𝐺) ↾ suc 𝐵)) = {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))})
89	61, 76, 88	syl2anc 411	. . . . . . . 8 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝐺‘(recs(𝐺) ↾ suc 𝐵)) = {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))})
90	56, 89	eqtrd 2267	. . . . . . 7 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = {𝑥 ∣ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))})
91	90	abeq2d 2347	. . . . . 6 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝑥 ∈ (frec(𝐹, 𝐴)‘suc 𝐵) ↔ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))))
92		fdm 5519	. . . . . . . . . . . 12 ⊢ ((recs(𝐺) ↾ suc 𝐵):suc 𝐵⟶𝑆 → dom (recs(𝐺) ↾ suc 𝐵) = suc 𝐵)
93	72, 92	syl 14	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → dom (recs(𝐺) ↾ suc 𝐵) = suc 𝐵)
94		peano3 4723	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ ω → suc 𝐵 ≠ ∅)
95	94	3ad2ant3 1047	. . . . . . . . . . 11 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → suc 𝐵 ≠ ∅)
96	93, 95	eqnetrd 2438	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → dom (recs(𝐺) ↾ suc 𝐵) ≠ ∅)
97	96	neneqd 2435	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ¬ dom (recs(𝐺) ↾ suc 𝐵) = ∅)
98	97	intnanrd 940	. . . . . . . 8 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ¬ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))
99		biorf 752	. . . . . . . 8 ⊢ (¬ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴) → (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ ((dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴) ∨ ∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))))))
100	98, 99	syl 14	. . . . . . 7 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ ((dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴) ∨ ∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))))))
101		orcom 736	. . . . . . 7 ⊢ (((dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴) ∨ ∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))) ↔ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴)))
102	100, 101	bitrdi 196	. . . . . 6 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ∨ (dom (recs(𝐺) ↾ suc 𝐵) = ∅ ∧ 𝑥 ∈ 𝐴))))
103	93	eqeq1d 2243	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ↔ suc 𝐵 = suc 𝑚))
104		vex 2818	. . . . . . . . . . . 12 ⊢ 𝑚 ∈ V
105		suc11g 4684	. . . . . . . . . . . 12 ⊢ ((𝐵 ∈ ω ∧ 𝑚 ∈ V) → (suc 𝐵 = suc 𝑚 ↔ 𝐵 = 𝑚))
106	104, 105	mpan2 425	. . . . . . . . . . 11 ⊢ (𝐵 ∈ ω → (suc 𝐵 = suc 𝑚 ↔ 𝐵 = 𝑚))
107	106	3ad2ant3 1047	. . . . . . . . . 10 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (suc 𝐵 = suc 𝑚 ↔ 𝐵 = 𝑚))
108	103, 107	bitrd 188	. . . . . . . . 9 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ↔ 𝐵 = 𝑚))
109		eqcom 2236	. . . . . . . . 9 ⊢ (𝐵 = 𝑚 ↔ 𝑚 = 𝐵)
110	108, 109	bitrdi 196	. . . . . . . 8 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ↔ 𝑚 = 𝐵))
111	110	anbi1d 465	. . . . . . 7 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ((dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ (𝑚 = 𝐵 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))))
112	111	rexbidv 2545	. . . . . 6 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (∃𝑚 ∈ ω (dom (recs(𝐺) ↾ suc 𝐵) = suc 𝑚 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ ∃𝑚 ∈ ω (𝑚 = 𝐵 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))))
113	91, 102, 112	3bitr2d 216	. . . . 5 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝑥 ∈ (frec(𝐹, 𝐴)‘suc 𝐵) ↔ ∃𝑚 ∈ ω (𝑚 = 𝐵 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)))))
114		fveq2 5675	. . . . . . . 8 ⊢ (𝑚 = 𝐵 → ((recs(𝐺) ↾ suc 𝐵)‘𝑚) = ((recs(𝐺) ↾ suc 𝐵)‘𝐵))
115	114	fveq2d 5679	. . . . . . 7 ⊢ (𝑚 = 𝐵 → (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)) = (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵)))
116	115	eleq2d 2304	. . . . . 6 ⊢ (𝑚 = 𝐵 → (𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚)) ↔ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵))))
117	116	ceqsrexbv 2951	. . . . 5 ⊢ (∃𝑚 ∈ ω (𝑚 = 𝐵 ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝑚))) ↔ (𝐵 ∈ ω ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵))))
118	113, 117	bitrdi 196	. . . 4 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝑥 ∈ (frec(𝐹, 𝐴)‘suc 𝐵) ↔ (𝐵 ∈ ω ∧ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵)))))
119	118	3anibar 1192	. . 3 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝑥 ∈ (frec(𝐹, 𝐴)‘suc 𝐵) ↔ 𝑥 ∈ (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵))))
120	119	eqrdv 2232	. 2 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵)))
121		sucidg 4542	. . . . . 6 ⊢ (𝐵 ∈ ω → 𝐵 ∈ suc 𝐵)
122		fvres 5699	. . . . . 6 ⊢ (𝐵 ∈ suc 𝐵 → ((recs(𝐺) ↾ suc 𝐵)‘𝐵) = (recs(𝐺)‘𝐵))
123	121, 122	syl 14	. . . . 5 ⊢ (𝐵 ∈ ω → ((recs(𝐺) ↾ suc 𝐵)‘𝐵) = (recs(𝐺)‘𝐵))
124	6	fveq1i 5676	. . . . . 6 ⊢ (frec(𝐹, 𝐴)‘𝐵) = ((recs(𝐺) ↾ ω)‘𝐵)
125		fvres 5699	. . . . . 6 ⊢ (𝐵 ∈ ω → ((recs(𝐺) ↾ ω)‘𝐵) = (recs(𝐺)‘𝐵))
126	124, 125	eqtrid 2279	. . . . 5 ⊢ (𝐵 ∈ ω → (frec(𝐹, 𝐴)‘𝐵) = (recs(𝐺)‘𝐵))
127	123, 126	eqtr4d 2270	. . . 4 ⊢ (𝐵 ∈ ω → ((recs(𝐺) ↾ suc 𝐵)‘𝐵) = (frec(𝐹, 𝐴)‘𝐵))
128	127	3ad2ant3 1047	. . 3 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → ((recs(𝐺) ↾ suc 𝐵)‘𝐵) = (frec(𝐹, 𝐴)‘𝐵))
129	128	fveq2d 5679	. 2 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (𝐹‘((recs(𝐺) ↾ suc 𝐵)‘𝐵)) = (𝐹‘(frec(𝐹, 𝐴)‘𝐵)))
130	120, 129	eqtrd 2267	1 ⊢ ((∀𝑧 ∈ 𝑆 (𝐹‘𝑧) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ ω) → (frec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘(frec(𝐹, 𝐴)‘𝐵)))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 716   ∧ w3a 1005   = wceq 1398   ∈ wcel 2205  {cab 2220   ≠ wne 2414  ∀wral 2522  ∃wrex 2523  Vcvv 2815   ⊆ wss 3214  ∅c0 3512  ∪ cuni 3919   ↦ cmpt 4176  Ord word 4488  Lim wlim 4490  suc csuc 4491  ωcom 4717  dom cdm 4754   ↾ cres 4756  Fun wfun 5351  ⟶wf 5353  ‘cfv 5357  recscrecs 6548  freccfrec 6634

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4230  ax-sep 4233  ax-nul 4241  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-iinf 4715

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-reu 2529  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-iun 3998  df-br 4115  df-opab 4177  df-mpt 4178  df-tr 4214  df-id 4419  df-iord 4492  df-on 4494  df-ilim 4495  df-suc 4497  df-iom 4718  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-recs 6549  df-frec 6635

This theorem is referenced by:  frecsuc  6651