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| Mirrors > Home > MPE Home > Th. List > fvssunirn | Structured version Visualization version GIF version | ||
| Description: The result of a function value is always a subset of the union of the range, even if it is invalid and thus empty. (Contributed by Stefan O'Rear, 2-Nov-2014.) (Revised by Mario Carneiro, 31-Aug-2015.) (Proof shortened by SN, 13-Jan-2025.) |
| Ref | Expression |
|---|---|
| fvssunirn | ⊢ (𝐹‘𝑋) ⊆ ∪ ran 𝐹 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfvunirn 6911 | . 2 ⊢ (𝑥 ∈ (𝐹‘𝑋) → 𝑥 ∈ ∪ ran 𝐹) | |
| 2 | 1 | ssriv 3940 | 1 ⊢ (𝐹‘𝑋) ⊆ ∪ ran 𝐹 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ⊆ wss 3904 ∪ cuni 4871 ran crn 5661 ‘cfv 6536 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pr 5403 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-cnv 5668 df-dm 5670 df-rn 5671 df-iota 6492 df-fv 6544 |
| This theorem is used by: ovssunirn 7448 marypha2lem1 9393 acnlem 10039 fin23lem29 10331 itunitc 10411 hsmexlem5 10420 wunfv 10723 wunex2 10729 strfvss 17253 prdsvallem 17513 prdsval 17514 prdsbas 17516 prdsplusg 17517 prdsmulr 17518 prdsvsca 17519 prdshom 17526 mreunirn 17659 mrcfval 17670 mrcssv 17676 mrisval 17692 sscpwex 17878 wunfunc 17964 catcxpccl 18269 comppfsc 23700 filunirn 24050 elflim 24139 flffval 24157 fclsval 24176 isfcls 24177 fcfval 24201 tsmsxplem1 24321 xmetunirn 24505 mopnval 24606 tmsval 24649 cfilfval 25434 caufval 25445 issgon 34522 elrnsiga 34525 volmeas 34630 omssubadd 34699 neibastop2lem 36899 ctbssinf 38080 ismtyval 38479 dicval 41978 prjcrv0 43393 ismrc 43460 nacsfix 43471 hbt 43885 |
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