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Mirrors > Home > MPE Home > Th. List > fimacnvdisj | Structured version Visualization version GIF version |
Description: The preimage of a class disjoint with a mapping's codomain is empty. (Contributed by FL, 24-Jan-2007.) |
Ref | Expression |
---|---|
fimacnvdisj | ⊢ ((𝐹:𝐴⟶𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → (◡𝐹 “ 𝐶) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rn 5591 | . . . 4 ⊢ ran 𝐹 = dom ◡𝐹 | |
2 | frn 6591 | . . . . 5 ⊢ (𝐹:𝐴⟶𝐵 → ran 𝐹 ⊆ 𝐵) | |
3 | 2 | adantr 480 | . . . 4 ⊢ ((𝐹:𝐴⟶𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → ran 𝐹 ⊆ 𝐵) |
4 | 1, 3 | eqsstrrid 3966 | . . 3 ⊢ ((𝐹:𝐴⟶𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → dom ◡𝐹 ⊆ 𝐵) |
5 | ssdisj 4390 | . . 3 ⊢ ((dom ◡𝐹 ⊆ 𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → (dom ◡𝐹 ∩ 𝐶) = ∅) | |
6 | 4, 5 | sylancom 587 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → (dom ◡𝐹 ∩ 𝐶) = ∅) |
7 | imadisj 5977 | . 2 ⊢ ((◡𝐹 “ 𝐶) = ∅ ↔ (dom ◡𝐹 ∩ 𝐶) = ∅) | |
8 | 6, 7 | sylibr 233 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ (𝐵 ∩ 𝐶) = ∅) → (◡𝐹 “ 𝐶) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∩ cin 3882 ⊆ wss 3883 ∅c0 4253 ◡ccnv 5579 dom cdm 5580 ran crn 5581 “ cima 5583 ⟶wf 6414 |
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-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 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 df-f 6422 |
This theorem is referenced by: vdwmc2 16608 gsumval3a 19419 psrbag0 21180 mbfconstlem 24696 itg1val2 24753 ofpreima2 30905 |
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