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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 6904 | . 2 ⊢ (𝑥 ∈ (𝐹‘𝑋) → 𝑥 ∈ ∪ ran 𝐹) | |
| 2 | 1 | ssriv 3935 | 1 ⊢ (𝐹‘𝑋) ⊆ ∪ ran 𝐹 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ⊆ wss 3899 ∪ cuni 4867 ran crn 5649 ‘cfv 6528 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-12 2213 ax-ext 2732 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-cnv 5656 df-dm 5658 df-rn 5659 df-iota 6484 df-fv 6536 |
| This theorem is used by: ovssunirn 7445 marypha2lem1 9405 acnlem 10084 fin23lem29 10376 itunitc 10456 hsmexlem5 10465 wunfv 10774 wunex2 10780 strfvss 17312 prdsvallem 17572 prdsval 17573 prdsbas 17575 prdsplusg 17576 prdsmulr 17577 prdsvsca 17578 prdshom 17585 mreunirn 17718 mrcfval 17729 mrcssv 17735 mrisval 17751 sscpwex 17937 wunfunc 18023 catcxpccl 18328 comppfsc 23798 filunirn 24148 elflim 24237 flffval 24255 fclsval 24274 isfcls 24275 fcfval 24299 tsmsxplem1 24419 xmetunirn 24603 mopnval 24704 tmsval 24747 cfilfval 25532 caufval 25543 issgon 34674 elrnsiga 34677 volmeas 34783 omssubadd 34852 neibastop2lem 37064 ctbssinf 38243 ismtyval 38648 dicval 42147 prjcrv0 43577 ismrc 43644 nacsfix 43655 hbt 44069 |
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