Theorem cauappcvgprlemm 6743

Description: Lemma for cauappcvgpr 6760. The putative limit is inhabited. (Contributed by Jim Kingdon, 18-Jul-2020.)

Hypotheses

Ref	Expression
cauappcvgpr.f	⊢ (𝜑 → 𝐹:Q⟶Q)
cauappcvgpr.app	⊢ (𝜑 → ∀𝑝 ∈ Q ∀𝑞 ∈ Q ((𝐹‘𝑝) <Q ((𝐹‘𝑞) +Q (𝑝 +Q 𝑞)) ∧ (𝐹‘𝑞) <Q ((𝐹‘𝑝) +Q (𝑝 +Q 𝑞))))
cauappcvgpr.bnd	⊢ (𝜑 → ∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝))
cauappcvgpr.lim	⊢ 𝐿 = ⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩

Assertion

Ref	Expression
cauappcvgprlemm	⊢ (𝜑 → (∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿) ∧ ∃𝑟 ∈ Q 𝑟 ∈ (2nd ‘𝐿)))

Distinct variable groups:   𝐴,𝑝   𝐿,𝑝,𝑞   𝜑,𝑝,𝑞   𝐿,𝑟,𝑠   𝐴,𝑠,𝑝   𝐹,𝑙,𝑢,𝑝,𝑞,𝑟,𝑠   𝜑,𝑟,𝑠

Allowed substitution hints:   𝜑(𝑢,𝑙)   𝐴(𝑢,𝑟,𝑞,𝑙)   𝐿(𝑢,𝑙)

Proof of Theorem cauappcvgprlemm

Step	Hyp	Ref	Expression
1		1nq 6464	. . . . . 6 ⊢ 1Q ∈ Q
2		cauappcvgpr.bnd	. . . . . 6 ⊢ (𝜑 → ∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝))
3		fveq2 5178	. . . . . . . 8 ⊢ (𝑝 = 1Q → (𝐹‘𝑝) = (𝐹‘1Q))
4	3	breq2d 3776	. . . . . . 7 ⊢ (𝑝 = 1Q → (𝐴 <Q (𝐹‘𝑝) ↔ 𝐴 <Q (𝐹‘1Q)))
5	4	rspcv 2652	. . . . . 6 ⊢ (1Q ∈ Q → (∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝) → 𝐴 <Q (𝐹‘1Q)))
6	1, 2, 5	mpsyl 59	. . . . 5 ⊢ (𝜑 → 𝐴 <Q (𝐹‘1Q))
7		ltrelnq 6463	. . . . . . 7 ⊢ <Q ⊆ (Q × Q)
8	7	brel 4392	. . . . . 6 ⊢ (𝐴 <Q (𝐹‘1Q) → (𝐴 ∈ Q ∧ (𝐹‘1Q) ∈ Q))
9	8	simpld 105	. . . . 5 ⊢ (𝐴 <Q (𝐹‘1Q) → 𝐴 ∈ Q)
10	6, 9	syl 14	. . . 4 ⊢ (𝜑 → 𝐴 ∈ Q)
11		halfnqq 6508	. . . 4 ⊢ (𝐴 ∈ Q → ∃𝑠 ∈ Q (𝑠 +Q 𝑠) = 𝐴)
12	10, 11	syl 14	. . 3 ⊢ (𝜑 → ∃𝑠 ∈ Q (𝑠 +Q 𝑠) = 𝐴)
13		simplr 482	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → 𝑠 ∈ Q)
14	2	ad2antrr 457	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → ∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝))
15		fveq2 5178	. . . . . . . . . . . 12 ⊢ (𝑝 = 𝑠 → (𝐹‘𝑝) = (𝐹‘𝑠))
16	15	breq2d 3776	. . . . . . . . . . 11 ⊢ (𝑝 = 𝑠 → (𝐴 <Q (𝐹‘𝑝) ↔ 𝐴 <Q (𝐹‘𝑠)))
17	16	rspcv 2652	. . . . . . . . . 10 ⊢ (𝑠 ∈ Q → (∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝) → 𝐴 <Q (𝐹‘𝑠)))
18	17	ad2antlr 458	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → (∀𝑝 ∈ Q 𝐴 <Q (𝐹‘𝑝) → 𝐴 <Q (𝐹‘𝑠)))
19	14, 18	mpd 13	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → 𝐴 <Q (𝐹‘𝑠))
20		breq1 3767	. . . . . . . . 9 ⊢ ((𝑠 +Q 𝑠) = 𝐴 → ((𝑠 +Q 𝑠) <Q (𝐹‘𝑠) ↔ 𝐴 <Q (𝐹‘𝑠)))
21	20	adantl 262	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → ((𝑠 +Q 𝑠) <Q (𝐹‘𝑠) ↔ 𝐴 <Q (𝐹‘𝑠)))
22	19, 21	mpbird 156	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → (𝑠 +Q 𝑠) <Q (𝐹‘𝑠))
23		oveq2 5520	. . . . . . . . 9 ⊢ (𝑞 = 𝑠 → (𝑠 +Q 𝑞) = (𝑠 +Q 𝑠))
24		fveq2 5178	. . . . . . . . 9 ⊢ (𝑞 = 𝑠 → (𝐹‘𝑞) = (𝐹‘𝑠))
25	23, 24	breq12d 3777	. . . . . . . 8 ⊢ (𝑞 = 𝑠 → ((𝑠 +Q 𝑞) <Q (𝐹‘𝑞) ↔ (𝑠 +Q 𝑠) <Q (𝐹‘𝑠)))
26	25	rspcev 2656	. . . . . . 7 ⊢ ((𝑠 ∈ Q ∧ (𝑠 +Q 𝑠) <Q (𝐹‘𝑠)) → ∃𝑞 ∈ Q (𝑠 +Q 𝑞) <Q (𝐹‘𝑞))
27	13, 22, 26	syl2anc 391	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → ∃𝑞 ∈ Q (𝑠 +Q 𝑞) <Q (𝐹‘𝑞))
28		oveq1 5519	. . . . . . . . 9 ⊢ (𝑙 = 𝑠 → (𝑙 +Q 𝑞) = (𝑠 +Q 𝑞))
29	28	breq1d 3774	. . . . . . . 8 ⊢ (𝑙 = 𝑠 → ((𝑙 +Q 𝑞) <Q (𝐹‘𝑞) ↔ (𝑠 +Q 𝑞) <Q (𝐹‘𝑞)))
30	29	rexbidv 2327	. . . . . . 7 ⊢ (𝑙 = 𝑠 → (∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞) ↔ ∃𝑞 ∈ Q (𝑠 +Q 𝑞) <Q (𝐹‘𝑞)))
31		cauappcvgpr.lim	. . . . . . . . 9 ⊢ 𝐿 = ⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩
32	31	fveq2i 5181	. . . . . . . 8 ⊢ (1st ‘𝐿) = (1st ‘⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩)
33		nqex 6461	. . . . . . . . . 10 ⊢ Q ∈ V
34	33	rabex 3901	. . . . . . . . 9 ⊢ {𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)} ∈ V
35	33	rabex 3901	. . . . . . . . 9 ⊢ {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢} ∈ V
36	34, 35	op1st 5773	. . . . . . . 8 ⊢ (1st ‘⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩) = {𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}
37	32, 36	eqtri 2060	. . . . . . 7 ⊢ (1st ‘𝐿) = {𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}
38	30, 37	elrab2 2700	. . . . . 6 ⊢ (𝑠 ∈ (1st ‘𝐿) ↔ (𝑠 ∈ Q ∧ ∃𝑞 ∈ Q (𝑠 +Q 𝑞) <Q (𝐹‘𝑞)))
39	13, 27, 38	sylanbrc 394	. . . . 5 ⊢ (((𝜑 ∧ 𝑠 ∈ Q) ∧ (𝑠 +Q 𝑠) = 𝐴) → 𝑠 ∈ (1st ‘𝐿))
40	39	ex 108	. . . 4 ⊢ ((𝜑 ∧ 𝑠 ∈ Q) → ((𝑠 +Q 𝑠) = 𝐴 → 𝑠 ∈ (1st ‘𝐿)))
41	40	reximdva 2421	. . 3 ⊢ (𝜑 → (∃𝑠 ∈ Q (𝑠 +Q 𝑠) = 𝐴 → ∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿)))
42	12, 41	mpd 13	. 2 ⊢ (𝜑 → ∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿))
43		cauappcvgpr.f	. . . . . 6 ⊢ (𝜑 → 𝐹:Q⟶Q)
44	1	a1i 9	. . . . . 6 ⊢ (𝜑 → 1Q ∈ Q)
45	43, 44	ffvelrnd 5303	. . . . 5 ⊢ (𝜑 → (𝐹‘1Q) ∈ Q)
46		addclnq 6473	. . . . 5 ⊢ (((𝐹‘1Q) ∈ Q ∧ 1Q ∈ Q) → ((𝐹‘1Q) +Q 1Q) ∈ Q)
47	45, 44, 46	syl2anc 391	. . . 4 ⊢ (𝜑 → ((𝐹‘1Q) +Q 1Q) ∈ Q)
48		addclnq 6473	. . . 4 ⊢ ((((𝐹‘1Q) +Q 1Q) ∈ Q ∧ 1Q ∈ Q) → (((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ Q)
49	47, 44, 48	syl2anc 391	. . 3 ⊢ (𝜑 → (((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ Q)
50		ltaddnq 6505	. . . . . 6 ⊢ ((((𝐹‘1Q) +Q 1Q) ∈ Q ∧ 1Q ∈ Q) → ((𝐹‘1Q) +Q 1Q) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q))
51	47, 44, 50	syl2anc 391	. . . . 5 ⊢ (𝜑 → ((𝐹‘1Q) +Q 1Q) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q))
52		fveq2 5178	. . . . . . . 8 ⊢ (𝑞 = 1Q → (𝐹‘𝑞) = (𝐹‘1Q))
53		id 19	. . . . . . . 8 ⊢ (𝑞 = 1Q → 𝑞 = 1Q)
54	52, 53	oveq12d 5530	. . . . . . 7 ⊢ (𝑞 = 1Q → ((𝐹‘𝑞) +Q 𝑞) = ((𝐹‘1Q) +Q 1Q))
55	54	breq1d 3774	. . . . . 6 ⊢ (𝑞 = 1Q → (((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q) ↔ ((𝐹‘1Q) +Q 1Q) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q)))
56	55	rspcev 2656	. . . . 5 ⊢ ((1Q ∈ Q ∧ ((𝐹‘1Q) +Q 1Q) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q)) → ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q))
57	44, 51, 56	syl2anc 391	. . . 4 ⊢ (𝜑 → ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q))
58		breq2 3768	. . . . . 6 ⊢ (𝑢 = (((𝐹‘1Q) +Q 1Q) +Q 1Q) → (((𝐹‘𝑞) +Q 𝑞) <Q 𝑢 ↔ ((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q)))
59	58	rexbidv 2327	. . . . 5 ⊢ (𝑢 = (((𝐹‘1Q) +Q 1Q) +Q 1Q) → (∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢 ↔ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q)))
60	31	fveq2i 5181	. . . . . 6 ⊢ (2nd ‘𝐿) = (2nd ‘⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩)
61	34, 35	op2nd 5774	. . . . . 6 ⊢ (2nd ‘⟨{𝑙 ∈ Q ∣ ∃𝑞 ∈ Q (𝑙 +Q 𝑞) <Q (𝐹‘𝑞)}, {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}⟩) = {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}
62	60, 61	eqtri 2060	. . . . 5 ⊢ (2nd ‘𝐿) = {𝑢 ∈ Q ∣ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q 𝑢}
63	59, 62	elrab2 2700	. . . 4 ⊢ ((((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ (2nd ‘𝐿) ↔ ((((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ Q ∧ ∃𝑞 ∈ Q ((𝐹‘𝑞) +Q 𝑞) <Q (((𝐹‘1Q) +Q 1Q) +Q 1Q)))
64	49, 57, 63	sylanbrc 394	. . 3 ⊢ (𝜑 → (((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ (2nd ‘𝐿))
65		eleq1 2100	. . . 4 ⊢ (𝑟 = (((𝐹‘1Q) +Q 1Q) +Q 1Q) → (𝑟 ∈ (2nd ‘𝐿) ↔ (((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ (2nd ‘𝐿)))
66	65	rspcev 2656	. . 3 ⊢ (((((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ Q ∧ (((𝐹‘1Q) +Q 1Q) +Q 1Q) ∈ (2nd ‘𝐿)) → ∃𝑟 ∈ Q 𝑟 ∈ (2nd ‘𝐿))
67	49, 64, 66	syl2anc 391	. 2 ⊢ (𝜑 → ∃𝑟 ∈ Q 𝑟 ∈ (2nd ‘𝐿))
68	42, 67	jca 290	1 ⊢ (𝜑 → (∃𝑠 ∈ Q 𝑠 ∈ (1st ‘𝐿) ∧ ∃𝑟 ∈ Q 𝑟 ∈ (2nd ‘𝐿)))

Syntax hints:   → wi 4   ∧ wa 97   ↔ wb 98   = wceq 1243   ∈ wcel 1393  ∀wral 2306  ∃wrex 2307  {crab 2310  ⟨cop 3378   class class class wbr 3764  ⟶wf 4898  ‘cfv 4902  (class class class)co 5512  1^st c1st 5765  2^nd c2nd 5766  Qcnq 6378  1_Qc1q 6379   +_Q cplq 6380   <_Q cltq 6383

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-13 1404  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-coll 3872  ax-sep 3875  ax-nul 3883  ax-pow 3927  ax-pr 3944  ax-un 4170  ax-setind 4262  ax-iinf 4311

This theorem depends on definitions:  df-bi 110  df-dc 743  df-3or 886  df-3an 887  df-tru 1246  df-fal 1249  df-nf 1350  df-sb 1646  df-eu 1903  df-mo 1904  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ne 2206  df-ral 2311  df-rex 2312  df-reu 2313  df-rab 2315  df-v 2559  df-sbc 2765  df-csb 2853  df-dif 2920  df-un 2922  df-in 2924  df-ss 2931  df-nul 3225  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-int 3616  df-iun 3659  df-br 3765  df-opab 3819  df-mpt 3820  df-tr 3855  df-eprel 4026  df-id 4030  df-iord 4103  df-on 4105  df-suc 4108  df-iom 4314  df-xp 4351  df-rel 4352  df-cnv 4353  df-co 4354  df-dm 4355  df-rn 4356  df-res 4357  df-ima 4358  df-iota 4867  df-fun 4904  df-fn 4905  df-f 4906  df-f1 4907  df-fo 4908  df-f1o 4909  df-fv 4910  df-ov 5515  df-oprab 5516  df-mpt2 5517  df-1st 5767  df-2nd 5768  df-recs 5920  df-irdg 5957  df-1o 6001  df-oadd 6005  df-omul 6006  df-er 6106  df-ec 6108  df-qs 6112  df-ni 6402  df-pli 6403  df-mi 6404  df-lti 6405  df-plpq 6442  df-mpq 6443  df-enq 6445  df-nqqs 6446  df-plqqs 6447  df-mqqs 6448  df-1nqqs 6449  df-rq 6450  df-ltnqqs 6451

This theorem is referenced by:  cauappcvgprlemcl  6751