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Theorem recexprlemss1l 7597
Description: The lower cut of 𝐴 ·P 𝐵 is a subset of the lower cut of one. Lemma for recexpr 7600. (Contributed by Jim Kingdon, 27-Dec-2019.)
Hypothesis
Ref Expression
recexpr.1 𝐵 = ⟨{𝑥 ∣ ∃𝑦(𝑥 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴))}, {𝑥 ∣ ∃𝑦(𝑦 <Q 𝑥 ∧ (*Q𝑦) ∈ (1st𝐴))}⟩
Assertion
Ref Expression
recexprlemss1l (𝐴P → (1st ‘(𝐴 ·P 𝐵)) ⊆ (1st ‘1P))
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐵,𝑦

Proof of Theorem recexprlemss1l
Dummy variables 𝑞 𝑧 𝑤 𝑢 𝑓 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 recexpr.1 . . . . . 6 𝐵 = ⟨{𝑥 ∣ ∃𝑦(𝑥 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴))}, {𝑥 ∣ ∃𝑦(𝑦 <Q 𝑥 ∧ (*Q𝑦) ∈ (1st𝐴))}⟩
21recexprlempr 7594 . . . . 5 (𝐴P𝐵P)
3 df-imp 7431 . . . . . 6 ·P = (𝑦P, 𝑤P ↦ ⟨{𝑢Q ∣ ∃𝑓Q𝑔Q (𝑓 ∈ (1st𝑦) ∧ 𝑔 ∈ (1st𝑤) ∧ 𝑢 = (𝑓 ·Q 𝑔))}, {𝑢Q ∣ ∃𝑓Q𝑔Q (𝑓 ∈ (2nd𝑦) ∧ 𝑔 ∈ (2nd𝑤) ∧ 𝑢 = (𝑓 ·Q 𝑔))}⟩)
4 mulclnq 7338 . . . . . 6 ((𝑓Q𝑔Q) → (𝑓 ·Q 𝑔) ∈ Q)
53, 4genpelvl 7474 . . . . 5 ((𝐴P𝐵P) → (𝑤 ∈ (1st ‘(𝐴 ·P 𝐵)) ↔ ∃𝑧 ∈ (1st𝐴)∃𝑞 ∈ (1st𝐵)𝑤 = (𝑧 ·Q 𝑞)))
62, 5mpdan 419 . . . 4 (𝐴P → (𝑤 ∈ (1st ‘(𝐴 ·P 𝐵)) ↔ ∃𝑧 ∈ (1st𝐴)∃𝑞 ∈ (1st𝐵)𝑤 = (𝑧 ·Q 𝑞)))
71recexprlemell 7584 . . . . . . . 8 (𝑞 ∈ (1st𝐵) ↔ ∃𝑦(𝑞 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴)))
8 ltrelnq 7327 . . . . . . . . . . . . . 14 <Q ⊆ (Q × Q)
98brel 4663 . . . . . . . . . . . . 13 (𝑞 <Q 𝑦 → (𝑞Q𝑦Q))
109simprd 113 . . . . . . . . . . . 12 (𝑞 <Q 𝑦𝑦Q)
11 prop 7437 . . . . . . . . . . . . . . . . . 18 (𝐴P → ⟨(1st𝐴), (2nd𝐴)⟩ ∈ P)
12 elprnql 7443 . . . . . . . . . . . . . . . . . 18 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑧 ∈ (1st𝐴)) → 𝑧Q)
1311, 12sylan 281 . . . . . . . . . . . . . . . . 17 ((𝐴P𝑧 ∈ (1st𝐴)) → 𝑧Q)
14 ltmnqi 7365 . . . . . . . . . . . . . . . . . 18 ((𝑞 <Q 𝑦𝑧Q) → (𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦))
1514expcom 115 . . . . . . . . . . . . . . . . 17 (𝑧Q → (𝑞 <Q 𝑦 → (𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦)))
1613, 15syl 14 . . . . . . . . . . . . . . . 16 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑞 <Q 𝑦 → (𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦)))
1716adantr 274 . . . . . . . . . . . . . . 15 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → (𝑞 <Q 𝑦 → (𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦)))
18 prltlu 7449 . . . . . . . . . . . . . . . . . . 19 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑧 ∈ (1st𝐴) ∧ (*Q𝑦) ∈ (2nd𝐴)) → 𝑧 <Q (*Q𝑦))
1911, 18syl3an1 1266 . . . . . . . . . . . . . . . . . 18 ((𝐴P𝑧 ∈ (1st𝐴) ∧ (*Q𝑦) ∈ (2nd𝐴)) → 𝑧 <Q (*Q𝑦))
20193expia 1200 . . . . . . . . . . . . . . . . 17 ((𝐴P𝑧 ∈ (1st𝐴)) → ((*Q𝑦) ∈ (2nd𝐴) → 𝑧 <Q (*Q𝑦)))
2120adantr 274 . . . . . . . . . . . . . . . 16 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → ((*Q𝑦) ∈ (2nd𝐴) → 𝑧 <Q (*Q𝑦)))
22 ltmnqi 7365 . . . . . . . . . . . . . . . . . . . . 21 ((𝑧 <Q (*Q𝑦) ∧ 𝑦Q) → (𝑦 ·Q 𝑧) <Q (𝑦 ·Q (*Q𝑦)))
2322expcom 115 . . . . . . . . . . . . . . . . . . . 20 (𝑦Q → (𝑧 <Q (*Q𝑦) → (𝑦 ·Q 𝑧) <Q (𝑦 ·Q (*Q𝑦))))
2423adantr 274 . . . . . . . . . . . . . . . . . . 19 ((𝑦Q𝑧Q) → (𝑧 <Q (*Q𝑦) → (𝑦 ·Q 𝑧) <Q (𝑦 ·Q (*Q𝑦))))
25 mulcomnqg 7345 . . . . . . . . . . . . . . . . . . . 20 ((𝑦Q𝑧Q) → (𝑦 ·Q 𝑧) = (𝑧 ·Q 𝑦))
26 recidnq 7355 . . . . . . . . . . . . . . . . . . . . 21 (𝑦Q → (𝑦 ·Q (*Q𝑦)) = 1Q)
2726adantr 274 . . . . . . . . . . . . . . . . . . . 20 ((𝑦Q𝑧Q) → (𝑦 ·Q (*Q𝑦)) = 1Q)
2825, 27breq12d 4002 . . . . . . . . . . . . . . . . . . 19 ((𝑦Q𝑧Q) → ((𝑦 ·Q 𝑧) <Q (𝑦 ·Q (*Q𝑦)) ↔ (𝑧 ·Q 𝑦) <Q 1Q))
2924, 28sylibd 148 . . . . . . . . . . . . . . . . . 18 ((𝑦Q𝑧Q) → (𝑧 <Q (*Q𝑦) → (𝑧 ·Q 𝑦) <Q 1Q))
3029ancoms 266 . . . . . . . . . . . . . . . . 17 ((𝑧Q𝑦Q) → (𝑧 <Q (*Q𝑦) → (𝑧 ·Q 𝑦) <Q 1Q))
3113, 30sylan 281 . . . . . . . . . . . . . . . 16 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → (𝑧 <Q (*Q𝑦) → (𝑧 ·Q 𝑦) <Q 1Q))
3221, 31syld 45 . . . . . . . . . . . . . . 15 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → ((*Q𝑦) ∈ (2nd𝐴) → (𝑧 ·Q 𝑦) <Q 1Q))
3317, 32anim12d 333 . . . . . . . . . . . . . 14 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → ((𝑞 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴)) → ((𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦) ∧ (𝑧 ·Q 𝑦) <Q 1Q)))
34 ltsonq 7360 . . . . . . . . . . . . . . 15 <Q Or Q
3534, 8sotri 5006 . . . . . . . . . . . . . 14 (((𝑧 ·Q 𝑞) <Q (𝑧 ·Q 𝑦) ∧ (𝑧 ·Q 𝑦) <Q 1Q) → (𝑧 ·Q 𝑞) <Q 1Q)
3633, 35syl6 33 . . . . . . . . . . . . 13 (((𝐴P𝑧 ∈ (1st𝐴)) ∧ 𝑦Q) → ((𝑞 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴)) → (𝑧 ·Q 𝑞) <Q 1Q))
3736exp4b 365 . . . . . . . . . . . 12 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑦Q → (𝑞 <Q 𝑦 → ((*Q𝑦) ∈ (2nd𝐴) → (𝑧 ·Q 𝑞) <Q 1Q))))
3810, 37syl5 32 . . . . . . . . . . 11 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑞 <Q 𝑦 → (𝑞 <Q 𝑦 → ((*Q𝑦) ∈ (2nd𝐴) → (𝑧 ·Q 𝑞) <Q 1Q))))
3938pm2.43d 50 . . . . . . . . . 10 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑞 <Q 𝑦 → ((*Q𝑦) ∈ (2nd𝐴) → (𝑧 ·Q 𝑞) <Q 1Q)))
4039impd 252 . . . . . . . . 9 ((𝐴P𝑧 ∈ (1st𝐴)) → ((𝑞 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴)) → (𝑧 ·Q 𝑞) <Q 1Q))
4140exlimdv 1812 . . . . . . . 8 ((𝐴P𝑧 ∈ (1st𝐴)) → (∃𝑦(𝑞 <Q 𝑦 ∧ (*Q𝑦) ∈ (2nd𝐴)) → (𝑧 ·Q 𝑞) <Q 1Q))
427, 41syl5bi 151 . . . . . . 7 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑞 ∈ (1st𝐵) → (𝑧 ·Q 𝑞) <Q 1Q))
43 breq1 3992 . . . . . . . 8 (𝑤 = (𝑧 ·Q 𝑞) → (𝑤 <Q 1Q ↔ (𝑧 ·Q 𝑞) <Q 1Q))
4443biimprcd 159 . . . . . . 7 ((𝑧 ·Q 𝑞) <Q 1Q → (𝑤 = (𝑧 ·Q 𝑞) → 𝑤 <Q 1Q))
4542, 44syl6 33 . . . . . 6 ((𝐴P𝑧 ∈ (1st𝐴)) → (𝑞 ∈ (1st𝐵) → (𝑤 = (𝑧 ·Q 𝑞) → 𝑤 <Q 1Q)))
4645expimpd 361 . . . . 5 (𝐴P → ((𝑧 ∈ (1st𝐴) ∧ 𝑞 ∈ (1st𝐵)) → (𝑤 = (𝑧 ·Q 𝑞) → 𝑤 <Q 1Q)))
4746rexlimdvv 2594 . . . 4 (𝐴P → (∃𝑧 ∈ (1st𝐴)∃𝑞 ∈ (1st𝐵)𝑤 = (𝑧 ·Q 𝑞) → 𝑤 <Q 1Q))
486, 47sylbid 149 . . 3 (𝐴P → (𝑤 ∈ (1st ‘(𝐴 ·P 𝐵)) → 𝑤 <Q 1Q))
49 1prl 7517 . . . 4 (1st ‘1P) = {𝑤𝑤 <Q 1Q}
5049abeq2i 2281 . . 3 (𝑤 ∈ (1st ‘1P) ↔ 𝑤 <Q 1Q)
5148, 50syl6ibr 161 . 2 (𝐴P → (𝑤 ∈ (1st ‘(𝐴 ·P 𝐵)) → 𝑤 ∈ (1st ‘1P)))
5251ssrdv 3153 1 (𝐴P → (1st ‘(𝐴 ·P 𝐵)) ⊆ (1st ‘1P))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104   = wceq 1348  wex 1485  wcel 2141  {cab 2156  wrex 2449  wss 3121  cop 3586   class class class wbr 3989  cfv 5198  (class class class)co 5853  1st c1st 6117  2nd c2nd 6118  Qcnq 7242  1Qc1q 7243   ·Q cmq 7245  *Qcrq 7246   <Q cltq 7247  Pcnp 7253  1Pc1p 7254   ·P cmp 7256
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-coll 4104  ax-sep 4107  ax-nul 4115  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-iinf 4572
This theorem depends on definitions:  df-bi 116  df-dc 830  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-nul 3415  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-iun 3875  df-br 3990  df-opab 4051  df-mpt 4052  df-tr 4088  df-eprel 4274  df-id 4278  df-po 4281  df-iso 4282  df-iord 4351  df-on 4353  df-suc 4356  df-iom 4575  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206  df-ov 5856  df-oprab 5857  df-mpo 5858  df-1st 6119  df-2nd 6120  df-recs 6284  df-irdg 6349  df-1o 6395  df-oadd 6399  df-omul 6400  df-er 6513  df-ec 6515  df-qs 6519  df-ni 7266  df-pli 7267  df-mi 7268  df-lti 7269  df-plpq 7306  df-mpq 7307  df-enq 7309  df-nqqs 7310  df-plqqs 7311  df-mqqs 7312  df-1nqqs 7313  df-rq 7314  df-ltnqqs 7315  df-inp 7428  df-i1p 7429  df-imp 7431
This theorem is referenced by:  recexprlemex  7599
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