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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.) |
Ref | Expression |
---|---|
fvssunirn | ⊢ (𝐹‘𝑋) ⊆ ∪ ran 𝐹 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fvrn0 6697 | . . 3 ⊢ (𝐹‘𝑋) ∈ (ran 𝐹 ∪ {∅}) | |
2 | elssuni 4867 | . . 3 ⊢ ((𝐹‘𝑋) ∈ (ran 𝐹 ∪ {∅}) → (𝐹‘𝑋) ⊆ ∪ (ran 𝐹 ∪ {∅})) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ (𝐹‘𝑋) ⊆ ∪ (ran 𝐹 ∪ {∅}) |
4 | uniun 4860 | . . 3 ⊢ ∪ (ran 𝐹 ∪ {∅}) = (∪ ran 𝐹 ∪ ∪ {∅}) | |
5 | 0ex 5210 | . . . . 5 ⊢ ∅ ∈ V | |
6 | 5 | unisn 4857 | . . . 4 ⊢ ∪ {∅} = ∅ |
7 | 6 | uneq2i 4135 | . . 3 ⊢ (∪ ran 𝐹 ∪ ∪ {∅}) = (∪ ran 𝐹 ∪ ∅) |
8 | un0 4343 | . . 3 ⊢ (∪ ran 𝐹 ∪ ∅) = ∪ ran 𝐹 | |
9 | 4, 7, 8 | 3eqtri 2848 | . 2 ⊢ ∪ (ran 𝐹 ∪ {∅}) = ∪ ran 𝐹 |
10 | 3, 9 | sseqtri 4002 | 1 ⊢ (𝐹‘𝑋) ⊆ ∪ ran 𝐹 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2110 ∪ cun 3933 ⊆ wss 3935 ∅c0 4290 {csn 4566 ∪ cuni 4837 ran crn 5555 ‘cfv 6354 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4838 df-br 5066 df-opab 5128 df-cnv 5562 df-dm 5564 df-rn 5565 df-iota 6313 df-fv 6362 |
This theorem is referenced by: ovssunirn 7191 marypha2lem1 8898 acnlem 9473 fin23lem29 9762 itunitc 9842 hsmexlem5 9851 wunfv 10153 wunex2 10159 strfvss 16505 prdsval 16727 prdsbas 16729 prdsplusg 16730 prdsmulr 16731 prdsvsca 16732 prdshom 16739 mreunirn 16871 mrcfval 16878 mrcssv 16884 mrisval 16900 sscpwex 17084 wunfunc 17168 catcxpccl 17456 comppfsc 22139 filunirn 22489 elflim 22578 flffval 22596 fclsval 22615 isfcls 22616 fcfval 22640 tsmsxplem1 22760 xmetunirn 22946 mopnval 23047 tmsval 23090 cfilfval 23866 caufval 23877 issgon 31382 elrnsiga 31385 volmeas 31490 omssubadd 31558 neibastop2lem 33708 ctbssinf 34686 ismtyval 35077 dicval 38311 ismrc 39296 nacsfix 39307 hbt 39728 |
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