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Theorem ltexprlemupu 7634

Description: The upper cut of our constructed difference is upper. Lemma for ltexpri 7643. (Contributed by Jim Kingdon, 21-Dec-2019.)

**Hypothesis**
Ref	Expression
ltexprlem.1	⊢ 𝐶 = ⟨{𝑥 ∈ Q ∣ ∃𝑦(𝑦 ∈ (2^nd ‘𝐴) ∧ (𝑦 +_Q 𝑥) ∈ (1^st ‘𝐵))}, {𝑥 ∈ Q ∣ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑥) ∈ (2^nd ‘𝐵))}⟩

**Assertion**
Ref	Expression
ltexprlemupu	⊢ ((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) → (∃𝑞 ∈ Q (𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶)) → 𝑟 ∈ (2^nd ‘𝐶)))

Distinct variable groups: 𝑥,𝑦,𝑞,𝑟,𝐴 𝑥,𝐵,𝑦,𝑞,𝑟 𝑥,𝐶,𝑦,𝑞,𝑟

**Proof of Theorem ltexprlemupu**
Step	Hyp	Ref	Expression
1		simplr 528	. . . . . 6 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝑟 ∈ Q)
2		simprrr 540	. . . . . . 7 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))
3	2	simpld 112	. . . . . 6 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝑦 ∈ (1^st ‘𝐴))
4		simprl 529	. . . . . . . 8 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝑞 <_Q 𝑟)
5		simpll 527	. . . . . . . . 9 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝐴<_P 𝐵)
6		simprrl 539	. . . . . . . . . 10 ⊢ ((𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))) → 𝑦 ∈ (1^st ‘𝐴))
7	6	adantl 277	. . . . . . . . 9 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝑦 ∈ (1^st ‘𝐴))
8		ltrelpr 7535	. . . . . . . . . . . . 13 ⊢ <_P ⊆ (P × P)
9	8	brel 4696	. . . . . . . . . . . 12 ⊢ (𝐴<_P 𝐵 → (𝐴 ∈ P ∧ 𝐵 ∈ P))
10	9	simpld 112	. . . . . . . . . . 11 ⊢ (𝐴<_P 𝐵 → 𝐴 ∈ P)
11		prop 7505	. . . . . . . . . . 11 ⊢ (𝐴 ∈ P → ⟨(1^st ‘𝐴), (2^nd ‘𝐴)⟩ ∈ P)
12	10, 11	syl 14	. . . . . . . . . 10 ⊢ (𝐴<_P 𝐵 → ⟨(1^st ‘𝐴), (2^nd ‘𝐴)⟩ ∈ P)
13		elprnql 7511	. . . . . . . . . 10 ⊢ ((⟨(1^st ‘𝐴), (2^nd ‘𝐴)⟩ ∈ P ∧ 𝑦 ∈ (1^st ‘𝐴)) → 𝑦 ∈ Q)
14	12, 13	sylan 283	. . . . . . . . 9 ⊢ ((𝐴<_P 𝐵 ∧ 𝑦 ∈ (1^st ‘𝐴)) → 𝑦 ∈ Q)
15	5, 7, 14	syl2anc 411	. . . . . . . 8 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝑦 ∈ Q)
16		ltanqi 7432	. . . . . . . 8 ⊢ ((𝑞 <_Q 𝑟 ∧ 𝑦 ∈ Q) → (𝑦 +_Q 𝑞) <_Q (𝑦 +_Q 𝑟))
17	4, 15, 16	syl2anc 411	. . . . . . 7 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → (𝑦 +_Q 𝑞) <_Q (𝑦 +_Q 𝑟))
18	9	simprd 114	. . . . . . . . 9 ⊢ (𝐴<_P 𝐵 → 𝐵 ∈ P)
19	5, 18	syl 14	. . . . . . . 8 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → 𝐵 ∈ P)
20	2	simprd 114	. . . . . . . 8 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))
21		prop 7505	. . . . . . . . 9 ⊢ (𝐵 ∈ P → ⟨(1^st ‘𝐵), (2^nd ‘𝐵)⟩ ∈ P)
22		prcunqu 7515	. . . . . . . . 9 ⊢ ((⟨(1^st ‘𝐵), (2^nd ‘𝐵)⟩ ∈ P ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)) → ((𝑦 +_Q 𝑞) <_Q (𝑦 +_Q 𝑟) → (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵)))
23	21, 22	sylan 283	. . . . . . . 8 ⊢ ((𝐵 ∈ P ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)) → ((𝑦 +_Q 𝑞) <_Q (𝑦 +_Q 𝑟) → (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵)))
24	19, 20, 23	syl2anc 411	. . . . . . 7 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → ((𝑦 +_Q 𝑞) <_Q (𝑦 +_Q 𝑟) → (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵)))
25	17, 24	mpd 13	. . . . . 6 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))
26	1, 3, 25	jca32 310	. . . . 5 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → (𝑟 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))))
27	26	eximi 1611	. . . 4 ⊢ (∃𝑦((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) → ∃𝑦(𝑟 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))))
28		ltexprlem.1	. . . . . . . . . 10 ⊢ 𝐶 = ⟨{𝑥 ∈ Q ∣ ∃𝑦(𝑦 ∈ (2^nd ‘𝐴) ∧ (𝑦 +_Q 𝑥) ∈ (1^st ‘𝐵))}, {𝑥 ∈ Q ∣ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑥) ∈ (2^nd ‘𝐵))}⟩
29	28	ltexprlemelu 7629	. . . . . . . . 9 ⊢ (𝑞 ∈ (2^nd ‘𝐶) ↔ (𝑞 ∈ Q ∧ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))
30		19.42v 1918	. . . . . . . . 9 ⊢ (∃𝑦(𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))) ↔ (𝑞 ∈ Q ∧ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))
31	29, 30	bitr4i 187	. . . . . . . 8 ⊢ (𝑞 ∈ (2^nd ‘𝐶) ↔ ∃𝑦(𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))
32	31	anbi2i 457	. . . . . . 7 ⊢ ((𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶)) ↔ (𝑞 <_Q 𝑟 ∧ ∃𝑦(𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))))
33		19.42v 1918	. . . . . . 7 ⊢ (∃𝑦(𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))) ↔ (𝑞 <_Q 𝑟 ∧ ∃𝑦(𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))))
34	32, 33	bitr4i 187	. . . . . 6 ⊢ ((𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶)) ↔ ∃𝑦(𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵)))))
35	34	anbi2i 457	. . . . 5 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶))) ↔ ((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ ∃𝑦(𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))))
36		19.42v 1918	. . . . 5 ⊢ (∃𝑦((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))) ↔ ((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ ∃𝑦(𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))))
37	35, 36	bitr4i 187	. . . 4 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶))) ↔ ∃𝑦((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ (𝑞 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑞) ∈ (2^nd ‘𝐵))))))
38	28	ltexprlemelu 7629	. . . . 5 ⊢ (𝑟 ∈ (2^nd ‘𝐶) ↔ (𝑟 ∈ Q ∧ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))))
39		19.42v 1918	. . . . 5 ⊢ (∃𝑦(𝑟 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))) ↔ (𝑟 ∈ Q ∧ ∃𝑦(𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))))
40	38, 39	bitr4i 187	. . . 4 ⊢ (𝑟 ∈ (2^nd ‘𝐶) ↔ ∃𝑦(𝑟 ∈ Q ∧ (𝑦 ∈ (1^st ‘𝐴) ∧ (𝑦 +_Q 𝑟) ∈ (2^nd ‘𝐵))))
41	27, 37, 40	3imtr4i 201	. . 3 ⊢ (((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) ∧ (𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶))) → 𝑟 ∈ (2^nd ‘𝐶))
42	41	ex 115	. 2 ⊢ ((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) → ((𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶)) → 𝑟 ∈ (2^nd ‘𝐶)))
43	42	rexlimdvw 2611	1 ⊢ ((𝐴<_P 𝐵 ∧ 𝑟 ∈ Q) → (∃𝑞 ∈ Q (𝑞 <_Q 𝑟 ∧ 𝑞 ∈ (2^nd ‘𝐶)) → 𝑟 ∈ (2^nd ‘𝐶)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∃wex 1503 ∈ wcel 2160 ∃wrex 2469 {crab 2472 ⟨cop 3610 class class class wbr 4018 ‘cfv 5235 (class class class)co 5897 1^st c1st 6164 2^nd c2nd 6165 Qcnq 7310 +_Q cplq 7312 <_Q cltq 7315 Pcnp 7321 <_P cltp 7325

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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-coll 4133 ax-sep 4136 ax-nul 4144 ax-pow 4192 ax-pr 4227 ax-un 4451 ax-setind 4554 ax-iinf 4605

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-ral 2473 df-rex 2474 df-reu 2475 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-iun 3903 df-br 4019 df-opab 4080 df-mpt 4081 df-tr 4117 df-eprel 4307 df-id 4311 df-iord 4384 df-on 4386 df-suc 4389 df-iom 4608 df-xp 4650 df-rel 4651 df-cnv 4652 df-co 4653 df-dm 4654 df-rn 4655 df-res 4656 df-ima 4657 df-iota 5196 df-fun 5237 df-fn 5238 df-f 5239 df-f1 5240 df-fo 5241 df-f1o 5242 df-fv 5243 df-ov 5900 df-oprab 5901 df-mpo 5902 df-1st 6166 df-2nd 6167 df-recs 6331 df-irdg 6396 df-oadd 6446 df-omul 6447 df-er 6560 df-ec 6562 df-qs 6566 df-ni 7334 df-pli 7335 df-mi 7336 df-lti 7337 df-plpq 7374 df-enq 7377 df-nqqs 7378 df-plqqs 7379 df-ltnqqs 7383 df-inp 7496 df-iltp 7500

This theorem is referenced by: ltexprlemrnd 7635

W3C validator