Theorem imadisjlnd 6029

Description: Deduction form of one negated side of imadisj 6028. (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 6028	. . . 4 ⊢ ((𝐴 “ 𝐵) = ∅ ↔ (dom 𝐴 ∩ 𝐵) = ∅)
3	2	biimpi 216	. . 3 ⊢ ((𝐴 “ 𝐵) = ∅ → (dom 𝐴 ∩ 𝐵) = ∅)
4	3	necon3i 2960	. 2 ⊢ ((dom 𝐴 ∩ 𝐵) ≠ ∅ → (𝐴 “ 𝐵) ≠ ∅)
5	1, 4	syl 17	1 ⊢ (𝜑 → (𝐴 “ 𝐵) ≠ ∅)

Syntax hints:   → wi 4   = wceq 1541   ≠ wne 2928   ∩ cin 3896  ∅c0 4280  dom cdm 5614   “ cima 5617

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 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-ext 2703  ax-sep 5232  ax-nul 5242  ax-pr 5368

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2710  df-cleq 2723  df-clel 2806  df-ne 2929  df-ral 3048  df-rex 3057  df-rab 3396  df-v 3438  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-nul 4281  df-if 4473  df-sn 4574  df-pr 4576  df-op 4580  df-br 5090  df-opab 5152  df-xp 5620  df-cnv 5622  df-dm 5624  df-rn 5625  df-res 5626  df-ima 5627

This theorem is referenced by:  vonf1owev  35152  weiunfrlem  36508  wnefimgd  44264  grimuhgr  47997