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Theorem mulcomprg 7411
Description: Multiplication of positive reals is commutative. Proposition 9-3.7(ii) of [Gleason] p. 124. (Contributed by Jim Kingdon, 11-Dec-2019.)
Assertion
Ref Expression
mulcomprg ((𝐴P𝐵P) → (𝐴 ·P 𝐵) = (𝐵 ·P 𝐴))

Proof of Theorem mulcomprg
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 prop 7306 . . . . . . . . 9 (𝐵P → ⟨(1st𝐵), (2nd𝐵)⟩ ∈ P)
2 elprnql 7312 . . . . . . . . 9 ((⟨(1st𝐵), (2nd𝐵)⟩ ∈ P𝑧 ∈ (1st𝐵)) → 𝑧Q)
31, 2sylan 281 . . . . . . . 8 ((𝐵P𝑧 ∈ (1st𝐵)) → 𝑧Q)
4 prop 7306 . . . . . . . . . . . . 13 (𝐴P → ⟨(1st𝐴), (2nd𝐴)⟩ ∈ P)
5 elprnql 7312 . . . . . . . . . . . . 13 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑦 ∈ (1st𝐴)) → 𝑦Q)
64, 5sylan 281 . . . . . . . . . . . 12 ((𝐴P𝑦 ∈ (1st𝐴)) → 𝑦Q)
7 mulcomnqg 7214 . . . . . . . . . . . . 13 ((𝑧Q𝑦Q) → (𝑧 ·Q 𝑦) = (𝑦 ·Q 𝑧))
87eqeq2d 2152 . . . . . . . . . . . 12 ((𝑧Q𝑦Q) → (𝑥 = (𝑧 ·Q 𝑦) ↔ 𝑥 = (𝑦 ·Q 𝑧)))
96, 8sylan2 284 . . . . . . . . . . 11 ((𝑧Q ∧ (𝐴P𝑦 ∈ (1st𝐴))) → (𝑥 = (𝑧 ·Q 𝑦) ↔ 𝑥 = (𝑦 ·Q 𝑧)))
109anassrs 398 . . . . . . . . . 10 (((𝑧Q𝐴P) ∧ 𝑦 ∈ (1st𝐴)) → (𝑥 = (𝑧 ·Q 𝑦) ↔ 𝑥 = (𝑦 ·Q 𝑧)))
1110rexbidva 2435 . . . . . . . . 9 ((𝑧Q𝐴P) → (∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧)))
1211ancoms 266 . . . . . . . 8 ((𝐴P𝑧Q) → (∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧)))
133, 12sylan2 284 . . . . . . 7 ((𝐴P ∧ (𝐵P𝑧 ∈ (1st𝐵))) → (∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧)))
1413anassrs 398 . . . . . 6 (((𝐴P𝐵P) ∧ 𝑧 ∈ (1st𝐵)) → (∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧)))
1514rexbidva 2435 . . . . 5 ((𝐴P𝐵P) → (∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧)))
16 rexcom 2598 . . . . 5 (∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑦 ·Q 𝑧) ↔ ∃𝑦 ∈ (1st𝐴)∃𝑧 ∈ (1st𝐵)𝑥 = (𝑦 ·Q 𝑧))
1715, 16syl6bb 195 . . . 4 ((𝐴P𝐵P) → (∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (1st𝐴)∃𝑧 ∈ (1st𝐵)𝑥 = (𝑦 ·Q 𝑧)))
1817rabbidv 2678 . . 3 ((𝐴P𝐵P) → {𝑥Q ∣ ∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦)} = {𝑥Q ∣ ∃𝑦 ∈ (1st𝐴)∃𝑧 ∈ (1st𝐵)𝑥 = (𝑦 ·Q 𝑧)})
19 elprnqu 7313 . . . . . . . . 9 ((⟨(1st𝐵), (2nd𝐵)⟩ ∈ P𝑧 ∈ (2nd𝐵)) → 𝑧Q)
201, 19sylan 281 . . . . . . . 8 ((𝐵P𝑧 ∈ (2nd𝐵)) → 𝑧Q)
21 elprnqu 7313 . . . . . . . . . . . . 13 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑦 ∈ (2nd𝐴)) → 𝑦Q)
224, 21sylan 281 . . . . . . . . . . . 12 ((𝐴P𝑦 ∈ (2nd𝐴)) → 𝑦Q)
2322, 8sylan2 284 . . . . . . . . . . 11 ((𝑧Q ∧ (𝐴P𝑦 ∈ (2nd𝐴))) → (𝑥 = (𝑧 ·Q 𝑦) ↔ 𝑥 = (𝑦 ·Q 𝑧)))
2423anassrs 398 . . . . . . . . . 10 (((𝑧Q𝐴P) ∧ 𝑦 ∈ (2nd𝐴)) → (𝑥 = (𝑧 ·Q 𝑦) ↔ 𝑥 = (𝑦 ·Q 𝑧)))
2524rexbidva 2435 . . . . . . . . 9 ((𝑧Q𝐴P) → (∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧)))
2625ancoms 266 . . . . . . . 8 ((𝐴P𝑧Q) → (∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧)))
2720, 26sylan2 284 . . . . . . 7 ((𝐴P ∧ (𝐵P𝑧 ∈ (2nd𝐵))) → (∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧)))
2827anassrs 398 . . . . . 6 (((𝐴P𝐵P) ∧ 𝑧 ∈ (2nd𝐵)) → (∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧)))
2928rexbidva 2435 . . . . 5 ((𝐴P𝐵P) → (∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧)))
30 rexcom 2598 . . . . 5 (∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑦 ·Q 𝑧) ↔ ∃𝑦 ∈ (2nd𝐴)∃𝑧 ∈ (2nd𝐵)𝑥 = (𝑦 ·Q 𝑧))
3129, 30syl6bb 195 . . . 4 ((𝐴P𝐵P) → (∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦) ↔ ∃𝑦 ∈ (2nd𝐴)∃𝑧 ∈ (2nd𝐵)𝑥 = (𝑦 ·Q 𝑧)))
3231rabbidv 2678 . . 3 ((𝐴P𝐵P) → {𝑥Q ∣ ∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦)} = {𝑥Q ∣ ∃𝑦 ∈ (2nd𝐴)∃𝑧 ∈ (2nd𝐵)𝑥 = (𝑦 ·Q 𝑧)})
3318, 32opeq12d 3720 . 2 ((𝐴P𝐵P) → ⟨{𝑥Q ∣ ∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦)}, {𝑥Q ∣ ∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦)}⟩ = ⟨{𝑥Q ∣ ∃𝑦 ∈ (1st𝐴)∃𝑧 ∈ (1st𝐵)𝑥 = (𝑦 ·Q 𝑧)}, {𝑥Q ∣ ∃𝑦 ∈ (2nd𝐴)∃𝑧 ∈ (2nd𝐵)𝑥 = (𝑦 ·Q 𝑧)}⟩)
34 mpvlu 7370 . . 3 ((𝐵P𝐴P) → (𝐵 ·P 𝐴) = ⟨{𝑥Q ∣ ∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦)}, {𝑥Q ∣ ∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦)}⟩)
3534ancoms 266 . 2 ((𝐴P𝐵P) → (𝐵 ·P 𝐴) = ⟨{𝑥Q ∣ ∃𝑧 ∈ (1st𝐵)∃𝑦 ∈ (1st𝐴)𝑥 = (𝑧 ·Q 𝑦)}, {𝑥Q ∣ ∃𝑧 ∈ (2nd𝐵)∃𝑦 ∈ (2nd𝐴)𝑥 = (𝑧 ·Q 𝑦)}⟩)
36 mpvlu 7370 . 2 ((𝐴P𝐵P) → (𝐴 ·P 𝐵) = ⟨{𝑥Q ∣ ∃𝑦 ∈ (1st𝐴)∃𝑧 ∈ (1st𝐵)𝑥 = (𝑦 ·Q 𝑧)}, {𝑥Q ∣ ∃𝑦 ∈ (2nd𝐴)∃𝑧 ∈ (2nd𝐵)𝑥 = (𝑦 ·Q 𝑧)}⟩)
3733, 35, 363eqtr4rd 2184 1 ((𝐴P𝐵P) → (𝐴 ·P 𝐵) = (𝐵 ·P 𝐴))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104   = wceq 1332  wcel 1481  wrex 2418  {crab 2421  cop 3534  cfv 5130  (class class class)co 5781  1st c1st 6043  2nd c2nd 6044  Qcnq 7111   ·Q cmq 7114  Pcnp 7122   ·P cmp 7125
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 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-coll 4050  ax-sep 4053  ax-nul 4061  ax-pow 4105  ax-pr 4138  ax-un 4362  ax-setind 4459  ax-iinf 4509
This theorem depends on definitions:  df-bi 116  df-dc 821  df-3or 964  df-3an 965  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ne 2310  df-ral 2422  df-rex 2423  df-reu 2424  df-rab 2426  df-v 2691  df-sbc 2913  df-csb 3007  df-dif 3077  df-un 3079  df-in 3081  df-ss 3088  df-nul 3368  df-pw 3516  df-sn 3537  df-pr 3538  df-op 3540  df-uni 3744  df-int 3779  df-iun 3822  df-br 3937  df-opab 3997  df-mpt 3998  df-tr 4034  df-id 4222  df-iord 4295  df-on 4297  df-suc 4300  df-iom 4512  df-xp 4552  df-rel 4553  df-cnv 4554  df-co 4555  df-dm 4556  df-rn 4557  df-res 4558  df-ima 4559  df-iota 5095  df-fun 5132  df-fn 5133  df-f 5134  df-f1 5135  df-fo 5136  df-f1o 5137  df-fv 5138  df-ov 5784  df-oprab 5785  df-mpo 5786  df-1st 6045  df-2nd 6046  df-recs 6209  df-irdg 6274  df-oadd 6324  df-omul 6325  df-er 6436  df-ec 6438  df-qs 6442  df-ni 7135  df-mi 7137  df-mpq 7176  df-enq 7178  df-nqqs 7179  df-mqqs 7181  df-inp 7297  df-imp 7300
This theorem is referenced by:  ltmprr  7473  mulcmpblnrlemg  7571  mulcomsrg  7588  mulasssrg  7589  m1m1sr  7592  recexgt0sr  7604  mulgt0sr  7609  mulextsr1lem  7611  recidpirqlemcalc  7688
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