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Theorem nnmord 7410
Description: Ordering property of multiplication. Proposition 8.19 of [TakeutiZaring] p. 63, limited to natural numbers. (Contributed by NM, 22-Jan-1996.) (Revised by Mario Carneiro, 15-Nov-2014.)
Assertion
Ref Expression
nnmord ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴𝐵 ∧ ∅ ∈ 𝐶) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))

Proof of Theorem nnmord
StepHypRef Expression
1 nnmordi 7409 . . . . . 6 (((𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
21ex 443 . . . . 5 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → (∅ ∈ 𝐶 → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))
32com23 82 . . . 4 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → (𝐴𝐵 → (∅ ∈ 𝐶 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))
43impd 440 . . 3 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴𝐵 ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
543adant1 1062 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴𝐵 ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
6 ne0i 3763 . . . . . . . 8 ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → (𝐶 ·𝑜 𝐵) ≠ ∅)
7 nnm0r 7388 . . . . . . . . . 10 (𝐵 ∈ ω → (∅ ·𝑜 𝐵) = ∅)
8 oveq1 6370 . . . . . . . . . . 11 (𝐶 = ∅ → (𝐶 ·𝑜 𝐵) = (∅ ·𝑜 𝐵))
98eqeq1d 2507 . . . . . . . . . 10 (𝐶 = ∅ → ((𝐶 ·𝑜 𝐵) = ∅ ↔ (∅ ·𝑜 𝐵) = ∅))
107, 9syl5ibrcom 232 . . . . . . . . 9 (𝐵 ∈ ω → (𝐶 = ∅ → (𝐶 ·𝑜 𝐵) = ∅))
1110necon3d 2698 . . . . . . . 8 (𝐵 ∈ ω → ((𝐶 ·𝑜 𝐵) ≠ ∅ → 𝐶 ≠ ∅))
126, 11syl5 33 . . . . . . 7 (𝐵 ∈ ω → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → 𝐶 ≠ ∅))
1312adantr 474 . . . . . 6 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → 𝐶 ≠ ∅))
14 nnord 6777 . . . . . . . 8 (𝐶 ∈ ω → Ord 𝐶)
15 ord0eln0 5528 . . . . . . . 8 (Ord 𝐶 → (∅ ∈ 𝐶𝐶 ≠ ∅))
1614, 15syl 17 . . . . . . 7 (𝐶 ∈ ω → (∅ ∈ 𝐶𝐶 ≠ ∅))
1716adantl 475 . . . . . 6 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → (∅ ∈ 𝐶𝐶 ≠ ∅))
1813, 17sylibrd 244 . . . . 5 ((𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → ∅ ∈ 𝐶))
19183adant1 1062 . . . 4 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → ∅ ∈ 𝐶))
20 oveq2 6371 . . . . . . . . . 10 (𝐴 = 𝐵 → (𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵))
2120a1i 11 . . . . . . . . 9 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐴 = 𝐵 → (𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵)))
22 nnmordi 7409 . . . . . . . . . 10 (((𝐴 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐵𝐴 → (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴)))
23223adantl2 1201 . . . . . . . . 9 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐵𝐴 → (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴)))
2421, 23orim12d 869 . . . . . . . 8 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → ((𝐴 = 𝐵𝐵𝐴) → ((𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵) ∨ (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴))))
2524con3d 142 . . . . . . 7 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (¬ ((𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵) ∨ (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴)) → ¬ (𝐴 = 𝐵𝐵𝐴)))
26 simpl3 1049 . . . . . . . . 9 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → 𝐶 ∈ ω)
27 simpl1 1047 . . . . . . . . 9 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → 𝐴 ∈ ω)
28 nnmcl 7390 . . . . . . . . 9 ((𝐶 ∈ ω ∧ 𝐴 ∈ ω) → (𝐶 ·𝑜 𝐴) ∈ ω)
2926, 27, 28syl2anc 682 . . . . . . . 8 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ ω)
30 simpl2 1048 . . . . . . . . 9 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → 𝐵 ∈ ω)
31 nnmcl 7390 . . . . . . . . 9 ((𝐶 ∈ ω ∧ 𝐵 ∈ ω) → (𝐶 ·𝑜 𝐵) ∈ ω)
3226, 30, 31syl2anc 682 . . . . . . . 8 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐵) ∈ ω)
33 nnord 6777 . . . . . . . . 9 ((𝐶 ·𝑜 𝐴) ∈ ω → Ord (𝐶 ·𝑜 𝐴))
34 nnord 6777 . . . . . . . . 9 ((𝐶 ·𝑜 𝐵) ∈ ω → Ord (𝐶 ·𝑜 𝐵))
35 ordtri2 5509 . . . . . . . . 9 ((Ord (𝐶 ·𝑜 𝐴) ∧ Ord (𝐶 ·𝑜 𝐵)) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) ↔ ¬ ((𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵) ∨ (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴))))
3633, 34, 35syl2an 487 . . . . . . . 8 (((𝐶 ·𝑜 𝐴) ∈ ω ∧ (𝐶 ·𝑜 𝐵) ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) ↔ ¬ ((𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵) ∨ (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴))))
3729, 32, 36syl2anc 682 . . . . . . 7 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) ↔ ¬ ((𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝐵) ∨ (𝐶 ·𝑜 𝐵) ∈ (𝐶 ·𝑜 𝐴))))
38 nnord 6777 . . . . . . . . 9 (𝐴 ∈ ω → Ord 𝐴)
39 nnord 6777 . . . . . . . . 9 (𝐵 ∈ ω → Ord 𝐵)
40 ordtri2 5509 . . . . . . . . 9 ((Ord 𝐴 ∧ Ord 𝐵) → (𝐴𝐵 ↔ ¬ (𝐴 = 𝐵𝐵𝐴)))
4138, 39, 40syl2an 487 . . . . . . . 8 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴𝐵 ↔ ¬ (𝐴 = 𝐵𝐵𝐴)))
4227, 30, 41syl2anc 682 . . . . . . 7 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → (𝐴𝐵 ↔ ¬ (𝐴 = 𝐵𝐵𝐴)))
4325, 37, 423imtr4d 278 . . . . . 6 (((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) ∧ ∅ ∈ 𝐶) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → 𝐴𝐵))
4443ex 443 . . . . 5 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → (∅ ∈ 𝐶 → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → 𝐴𝐵)))
4544com23 82 . . . 4 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → (∅ ∈ 𝐶𝐴𝐵)))
4619, 45mpdd 41 . . 3 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → 𝐴𝐵))
4746, 19jcad 548 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵) → (𝐴𝐵 ∧ ∅ ∈ 𝐶)))
485, 47impbid 197 1 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴𝐵 ∧ ∅ ∈ 𝐶) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 191  wo 377  wa 378  w3a 1021   = wceq 1468  wcel 1937  wne 2675  c0 3757  Ord word 5473  (class class class)co 6363  ωcom 6769   ·𝑜 comu 7257
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1698  ax-4 1711  ax-5 1789  ax-6 1836  ax-7 1883  ax-8 1939  ax-9 1946  ax-10 1965  ax-11 1970  ax-12 1983  ax-13 2137  ax-ext 2485  ax-sep 4558  ax-nul 4567  ax-pow 4619  ax-pr 4680  ax-un 6659
This theorem depends on definitions:  df-bi 192  df-or 379  df-an 380  df-3or 1022  df-3an 1023  df-tru 1471  df-ex 1693  df-nf 1697  df-sb 1829  df-eu 2357  df-mo 2358  df-clab 2492  df-cleq 2498  df-clel 2501  df-nfc 2635  df-ne 2677  df-ral 2796  df-rex 2797  df-reu 2798  df-rab 2800  df-v 3068  df-sbc 3292  df-csb 3386  df-dif 3429  df-un 3431  df-in 3433  df-ss 3440  df-pss 3442  df-nul 3758  df-if 3909  df-pw 3980  df-sn 3996  df-pr 3998  df-tp 4000  df-op 4002  df-uni 4229  df-iun 4309  df-br 4435  df-opab 4494  df-mpt 4495  df-tr 4531  df-eprel 4791  df-id 4795  df-po 4801  df-so 4802  df-fr 4839  df-we 4841  df-xp 4886  df-rel 4887  df-cnv 4888  df-co 4889  df-dm 4890  df-rn 4891  df-res 4892  df-ima 4893  df-pred 5431  df-ord 5477  df-on 5478  df-lim 5479  df-suc 5480  df-iota 5597  df-fun 5635  df-fn 5636  df-f 5637  df-f1 5638  df-fo 5639  df-f1o 5640  df-fv 5641  df-ov 6366  df-oprab 6367  df-mpt2 6368  df-om 6770  df-1st 6870  df-2nd 6871  df-wrecs 7105  df-recs 7167  df-rdg 7205  df-oadd 7263  df-omul 7264
This theorem is referenced by:  nnmword  7411  nnneo  7429  ltmpi  9414
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