MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  ltaprlem Structured version   Visualization version   GIF version

Theorem ltaprlem 9554
Description: Lemma for Proposition 9-3.5(v) of [Gleason] p. 123. (Contributed by NM, 8-Apr-1996.) (New usage is discouraged.)
Assertion
Ref Expression
ltaprlem (𝐶P → (𝐴<P 𝐵 → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))

Proof of Theorem ltaprlem
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 ltrelpr 9508 . . . . . 6 <P ⊆ (P × P)
21brel 4930 . . . . 5 (𝐴<P 𝐵 → (𝐴P𝐵P))
32simpld 468 . . . 4 (𝐴<P 𝐵𝐴P)
4 ltexpri 9553 . . . . 5 (𝐴<P 𝐵 → ∃𝑥P (𝐴 +P 𝑥) = 𝐵)
5 addclpr 9528 . . . . . . . 8 ((𝐶P𝐴P) → (𝐶 +P 𝐴) ∈ P)
6 ltaddpr 9544 . . . . . . . . . 10 (((𝐶 +P 𝐴) ∈ P𝑥P) → (𝐶 +P 𝐴)<P ((𝐶 +P 𝐴) +P 𝑥))
7 addasspr 9532 . . . . . . . . . . . 12 ((𝐶 +P 𝐴) +P 𝑥) = (𝐶 +P (𝐴 +P 𝑥))
8 oveq2 6371 . . . . . . . . . . . 12 ((𝐴 +P 𝑥) = 𝐵 → (𝐶 +P (𝐴 +P 𝑥)) = (𝐶 +P 𝐵))
97, 8syl5eq 2551 . . . . . . . . . . 11 ((𝐴 +P 𝑥) = 𝐵 → ((𝐶 +P 𝐴) +P 𝑥) = (𝐶 +P 𝐵))
109breq2d 4446 . . . . . . . . . 10 ((𝐴 +P 𝑥) = 𝐵 → ((𝐶 +P 𝐴)<P ((𝐶 +P 𝐴) +P 𝑥) ↔ (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
116, 10syl5ib 229 . . . . . . . . 9 ((𝐴 +P 𝑥) = 𝐵 → (((𝐶 +P 𝐴) ∈ P𝑥P) → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
1211expd 445 . . . . . . . 8 ((𝐴 +P 𝑥) = 𝐵 → ((𝐶 +P 𝐴) ∈ P → (𝑥P → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵))))
135, 12syl5 33 . . . . . . 7 ((𝐴 +P 𝑥) = 𝐵 → ((𝐶P𝐴P) → (𝑥P → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵))))
1413com3r 83 . . . . . 6 (𝑥P → ((𝐴 +P 𝑥) = 𝐵 → ((𝐶P𝐴P) → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵))))
1514rexlimiv 2902 . . . . 5 (∃𝑥P (𝐴 +P 𝑥) = 𝐵 → ((𝐶P𝐴P) → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
164, 15syl 17 . . . 4 (𝐴<P 𝐵 → ((𝐶P𝐴P) → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
173, 16sylan2i 676 . . 3 (𝐴<P 𝐵 → ((𝐶P𝐴<P 𝐵) → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
1817expd 445 . 2 (𝐴<P 𝐵 → (𝐶P → (𝐴<P 𝐵 → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵))))
1918pm2.43b 52 1 (𝐶P → (𝐴<P 𝐵 → (𝐶 +P 𝐴)<P (𝐶 +P 𝐵)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 378   = wceq 1468  wcel 1937  wrex 2792   class class class wbr 4434  (class class class)co 6363  Pcnp 9369   +P cpp 9371  <P cltp 9373
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  ax-inf2 8231
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-rmo 2799  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-int 4265  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-1o 7259  df-oadd 7263  df-omul 7264  df-er 7440  df-ni 9382  df-pli 9383  df-mi 9384  df-lti 9385  df-plpq 9418  df-mpq 9419  df-ltpq 9420  df-enq 9421  df-nq 9422  df-erq 9423  df-plq 9424  df-mq 9425  df-1nq 9426  df-rq 9427  df-ltnq 9428  df-np 9491  df-plp 9493  df-ltp 9495
This theorem is referenced by:  ltapr  9555
  Copyright terms: Public domain W3C validator