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Mirrors > Home > ILE Home > Th. List > relrnfvex | GIF version |
Description: If a function has a set range, then the function value exists unconditional on the domain. (Contributed by Mario Carneiro, 24-May-2019.) |
Ref | Expression |
---|---|
relrnfvex | ⊢ ((Rel 𝐹 ∧ ran 𝐹 ∈ V) → (𝐹‘A) ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relfvssunirn 5134 | . 2 ⊢ (Rel 𝐹 → (𝐹‘A) ⊆ ∪ ran 𝐹) | |
2 | uniexg 4141 | . 2 ⊢ (ran 𝐹 ∈ V → ∪ ran 𝐹 ∈ V) | |
3 | ssexg 3887 | . 2 ⊢ (((𝐹‘A) ⊆ ∪ ran 𝐹 ∧ ∪ ran 𝐹 ∈ V) → (𝐹‘A) ∈ V) | |
4 | 1, 2, 3 | syl2an 273 | 1 ⊢ ((Rel 𝐹 ∧ ran 𝐹 ∈ V) → (𝐹‘A) ∈ V) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 97 ∈ wcel 1390 Vcvv 2551 ⊆ wss 2911 ∪ cuni 3571 ran crn 4289 Rel wrel 4293 ‘cfv 4845 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 629 ax-5 1333 ax-7 1334 ax-gen 1335 ax-ie1 1379 ax-ie2 1380 ax-8 1392 ax-10 1393 ax-11 1394 ax-i12 1395 ax-bndl 1396 ax-4 1397 ax-13 1401 ax-14 1402 ax-17 1416 ax-i9 1420 ax-ial 1424 ax-i5r 1425 ax-ext 2019 ax-sep 3866 ax-pow 3918 ax-pr 3935 ax-un 4136 |
This theorem depends on definitions: df-bi 110 df-3an 886 df-tru 1245 df-nf 1347 df-sb 1643 df-eu 1900 df-mo 1901 df-clab 2024 df-cleq 2030 df-clel 2033 df-nfc 2164 df-ral 2305 df-rex 2306 df-v 2553 df-un 2916 df-in 2918 df-ss 2925 df-pw 3353 df-sn 3373 df-pr 3374 df-op 3376 df-uni 3572 df-br 3756 df-opab 3810 df-xp 4294 df-rel 4295 df-cnv 4296 df-dm 4298 df-rn 4299 df-iota 4810 df-fv 4853 |
This theorem is referenced by: (None) |
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