MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  2wlkdlem6 Structured version   Visualization version   GIF version

Theorem 2wlkdlem6 27712
Description: Lemma 6 for 2wlkd 27717. (Contributed by AV, 23-Jan-2021.)
Hypotheses
Ref Expression
2wlkd.p 𝑃 = ⟨“𝐴𝐵𝐶”⟩
2wlkd.f 𝐹 = ⟨“𝐽𝐾”⟩
2wlkd.s (𝜑 → (𝐴𝑉𝐵𝑉𝐶𝑉))
2wlkd.n (𝜑 → (𝐴𝐵𝐵𝐶))
2wlkd.e (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)))
Assertion
Ref Expression
2wlkdlem6 (𝜑 → (𝐵 ∈ (𝐼𝐽) ∧ 𝐵 ∈ (𝐼𝐾)))

Proof of Theorem 2wlkdlem6
StepHypRef Expression
1 2wlkd.e . 2 (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)))
2 prcom 4670 . . . . . . . . 9 {𝐴, 𝐵} = {𝐵, 𝐴}
32sseq1i 3997 . . . . . . . 8 ({𝐴, 𝐵} ⊆ (𝐼𝐽) ↔ {𝐵, 𝐴} ⊆ (𝐼𝐽))
43biimpi 218 . . . . . . 7 ({𝐴, 𝐵} ⊆ (𝐼𝐽) → {𝐵, 𝐴} ⊆ (𝐼𝐽))
54adantl 484 . . . . . 6 ((𝜑 ∧ {𝐴, 𝐵} ⊆ (𝐼𝐽)) → {𝐵, 𝐴} ⊆ (𝐼𝐽))
6 2wlkd.s . . . . . . . 8 (𝜑 → (𝐴𝑉𝐵𝑉𝐶𝑉))
76simp2d 1139 . . . . . . 7 (𝜑𝐵𝑉)
86simp1d 1138 . . . . . . . 8 (𝜑𝐴𝑉)
98adantr 483 . . . . . . 7 ((𝜑 ∧ {𝐴, 𝐵} ⊆ (𝐼𝐽)) → 𝐴𝑉)
10 prssg 4754 . . . . . . 7 ((𝐵𝑉𝐴𝑉) → ((𝐵 ∈ (𝐼𝐽) ∧ 𝐴 ∈ (𝐼𝐽)) ↔ {𝐵, 𝐴} ⊆ (𝐼𝐽)))
117, 9, 10syl2an2r 683 . . . . . 6 ((𝜑 ∧ {𝐴, 𝐵} ⊆ (𝐼𝐽)) → ((𝐵 ∈ (𝐼𝐽) ∧ 𝐴 ∈ (𝐼𝐽)) ↔ {𝐵, 𝐴} ⊆ (𝐼𝐽)))
125, 11mpbird 259 . . . . 5 ((𝜑 ∧ {𝐴, 𝐵} ⊆ (𝐼𝐽)) → (𝐵 ∈ (𝐼𝐽) ∧ 𝐴 ∈ (𝐼𝐽)))
1312simpld 497 . . . 4 ((𝜑 ∧ {𝐴, 𝐵} ⊆ (𝐼𝐽)) → 𝐵 ∈ (𝐼𝐽))
1413ex 415 . . 3 (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼𝐽) → 𝐵 ∈ (𝐼𝐽)))
15 simpr 487 . . . . . 6 ((𝜑 ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → {𝐵, 𝐶} ⊆ (𝐼𝐾))
166simp3d 1140 . . . . . . . 8 (𝜑𝐶𝑉)
1716adantr 483 . . . . . . 7 ((𝜑 ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → 𝐶𝑉)
18 prssg 4754 . . . . . . 7 ((𝐵𝑉𝐶𝑉) → ((𝐵 ∈ (𝐼𝐾) ∧ 𝐶 ∈ (𝐼𝐾)) ↔ {𝐵, 𝐶} ⊆ (𝐼𝐾)))
197, 17, 18syl2an2r 683 . . . . . 6 ((𝜑 ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → ((𝐵 ∈ (𝐼𝐾) ∧ 𝐶 ∈ (𝐼𝐾)) ↔ {𝐵, 𝐶} ⊆ (𝐼𝐾)))
2015, 19mpbird 259 . . . . 5 ((𝜑 ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → (𝐵 ∈ (𝐼𝐾) ∧ 𝐶 ∈ (𝐼𝐾)))
2120simpld 497 . . . 4 ((𝜑 ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → 𝐵 ∈ (𝐼𝐾))
2221ex 415 . . 3 (𝜑 → ({𝐵, 𝐶} ⊆ (𝐼𝐾) → 𝐵 ∈ (𝐼𝐾)))
2314, 22anim12d 610 . 2 (𝜑 → (({𝐴, 𝐵} ⊆ (𝐼𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼𝐾)) → (𝐵 ∈ (𝐼𝐽) ∧ 𝐵 ∈ (𝐼𝐾))))
241, 23mpd 15 1 (𝜑 → (𝐵 ∈ (𝐼𝐽) ∧ 𝐵 ∈ (𝐼𝐾)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 398  w3a 1083   = wceq 1537  wcel 2114  wne 3018  wss 3938  {cpr 4571  cfv 6357  ⟨“cs2 14205  ⟨“cs3 14206
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-v 3498  df-un 3943  df-in 3945  df-ss 3954  df-sn 4570  df-pr 4572
This theorem is referenced by:  2wlkdlem7  27713
  Copyright terms: Public domain W3C validator