Theorem imadisjlnd 39230

Description: Natural deduction form of one negated side of imadisj 5700. (Contributed by Stanislas Polu, 9-Mar-2020.)

Hypothesis

Ref	Expression
imadisjlnd.1	⊢ (𝜑 → (dom 𝐴 ∩ 𝐵) ≠ ∅)

Assertion

Ref	Expression
imadisjlnd	⊢ (𝜑 → (𝐴 “ 𝐵) ≠ ∅)

Proof of Theorem imadisjlnd

Step	Hyp	Ref	Expression
1		imadisjlnd.1	. 2 ⊢ (𝜑 → (dom 𝐴 ∩ 𝐵) ≠ ∅)
2		imadisj 5700	. . . 4 ⊢ ((𝐴 “ 𝐵) = ∅ ↔ (dom 𝐴 ∩ 𝐵) = ∅)
3	2	biimpi 208	. . 3 ⊢ ((𝐴 “ 𝐵) = ∅ → (dom 𝐴 ∩ 𝐵) = ∅)
4	3	necon3i 3002	. 2 ⊢ ((dom 𝐴 ∩ 𝐵) ≠ ∅ → (𝐴 “ 𝐵) ≠ ∅)
5	1, 4	syl 17	1 ⊢ (𝜑 → (𝐴 “ 𝐵) ≠ ∅)

Syntax hints:   → wi 4   = wceq 1653   ≠ wne 2970   ∩ cin 3767  ∅c0 4114  dom cdm 5311   “ cima 5314

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2377  ax-ext 2776  ax-sep 4974  ax-nul 4982  ax-pr 5096

This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2591  df-eu 2609  df-clab 2785  df-cleq 2791  df-clel 2794  df-nfc 2929  df-ne 2971  df-ral 3093  df-rex 3094  df-rab 3097  df-v 3386  df-dif 3771  df-un 3773  df-in 3775  df-ss 3782  df-nul 4115  df-if 4277  df-sn 4368  df-pr 4370  df-op 4374  df-br 4843  df-opab 4905  df-xp 5317  df-cnv 5319  df-dm 5321  df-rn 5322  df-res 5323  df-ima 5324

This theorem is referenced by: (None)