Theorem 2wlkdlem7 30262

Description: Lemma 7 for 2wlkd 30266. (Contributed by AV, 14-Feb-2021.)

Hypotheses

Ref	Expression
2wlkd.p	⊢ 𝑃 = ⟨“𝐴𝐵𝐶”⟩
2wlkd.f	⊢ 𝐹 = ⟨“𝐽𝐾”⟩
2wlkd.s	⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉))
2wlkd.n	⊢ (𝜑 → (𝐴 ≠ 𝐵 ∧ 𝐵 ≠ 𝐶))
2wlkd.e	⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾)))

Assertion

Ref	Expression
2wlkdlem7	⊢ (𝜑 → (𝐽 ∈ V ∧ 𝐾 ∈ V))

Proof of Theorem 2wlkdlem7

Step	Hyp	Ref	Expression
1		2wlkd.p	. . 3 ⊢ 𝑃 = ⟨“𝐴𝐵𝐶”⟩
2		2wlkd.f	. . 3 ⊢ 𝐹 = ⟨“𝐽𝐾”⟩
3		2wlkd.s	. . 3 ⊢ (𝜑 → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉))
4		2wlkd.n	. . 3 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ∧ 𝐵 ≠ 𝐶))
5		2wlkd.e	. . 3 ⊢ (𝜑 → ({𝐴, 𝐵} ⊆ (𝐼‘𝐽) ∧ {𝐵, 𝐶} ⊆ (𝐼‘𝐾)))
6	1, 2, 3, 4, 5	2wlkdlem6 30261	. 2 ⊢ (𝜑 → (𝐵 ∈ (𝐼‘𝐽) ∧ 𝐵 ∈ (𝐼‘𝐾)))
7		elfvex 6918	. . 3 ⊢ (𝐵 ∈ (𝐼‘𝐽) → 𝐽 ∈ V)
8		elfvex 6918	. . 3 ⊢ (𝐵 ∈ (𝐼‘𝐾) → 𝐾 ∈ V)
9	7, 8	anim12i 624	. 2 ⊢ ((𝐵 ∈ (𝐼‘𝐽) ∧ 𝐵 ∈ (𝐼‘𝐾)) → (𝐽 ∈ V ∧ 𝐾 ∈ V))
10	6, 9	syl 18	1 ⊢ (𝜑 → (𝐽 ∈ V ∧ 𝐾 ∈ V))

Syntax hints:   → wi 4   ∧ wa 400   ∧ w3a 1103   = wceq 1570   ∈ wcel 2143   ≠ wne 2958  Vcvv 3455   ⊆ wss 3906  {cpr 4592  ‘cfv 6538  ⟨“cs2 14880  ⟨“cs3 14881

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-nul 5270  ax-pr 5406

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-dm 5673  df-iota 6494  df-fv 6546

This theorem is referenced by:  2wlkdlem8  30263  2trld  30268