Mathbox for Stanislas Polu |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > imadisjlnd | Structured version Visualization version GIF version |
Description: Natural deduction form of one negated side of imadisj 5977. (Contributed by Stanislas Polu, 9-Mar-2020.) |
Ref | Expression |
---|---|
imadisjlnd.1 | ⊢ (𝜑 → (dom 𝐴 ∩ 𝐵) ≠ ∅) |
Ref | Expression |
---|---|
imadisjlnd | ⊢ (𝜑 → (𝐴 “ 𝐵) ≠ ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imadisjlnd.1 | . 2 ⊢ (𝜑 → (dom 𝐴 ∩ 𝐵) ≠ ∅) | |
2 | imadisj 5977 | . . . 4 ⊢ ((𝐴 “ 𝐵) = ∅ ↔ (dom 𝐴 ∩ 𝐵) = ∅) | |
3 | 2 | biimpi 215 | . . 3 ⊢ ((𝐴 “ 𝐵) = ∅ → (dom 𝐴 ∩ 𝐵) = ∅) |
4 | 3 | necon3i 2975 | . 2 ⊢ ((dom 𝐴 ∩ 𝐵) ≠ ∅ → (𝐴 “ 𝐵) ≠ ∅) |
5 | 1, 4 | syl 17 | 1 ⊢ (𝜑 → (𝐴 “ 𝐵) ≠ ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ≠ wne 2942 ∩ cin 3882 ∅c0 4253 dom cdm 5580 “ cima 5583 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-br 5071 df-opab 5133 df-xp 5586 df-cnv 5588 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 |
This theorem is referenced by: wnefimgd 41661 |
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