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Mirrors > Home > MPE Home > Th. List > unex | Structured version Visualization version GIF version |
Description: The union of two sets is a set. Corollary 5.8 of [TakeutiZaring] p. 16. (Contributed by NM, 1-Jul-1994.) |
Ref | Expression |
---|---|
unex.1 | ⊢ 𝐴 ∈ V |
unex.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
unex | ⊢ (𝐴 ∪ 𝐵) ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | unex.1 | . . 3 ⊢ 𝐴 ∈ V | |
2 | unex.2 | . . 3 ⊢ 𝐵 ∈ V | |
3 | 1, 2 | unipr 4449 | . 2 ⊢ ∪ {𝐴, 𝐵} = (𝐴 ∪ 𝐵) |
4 | prex 4909 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
5 | 4 | uniex 6953 | . 2 ⊢ ∪ {𝐴, 𝐵} ∈ V |
6 | 3, 5 | eqeltrri 2698 | 1 ⊢ (𝐴 ∪ 𝐵) ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1990 Vcvv 3200 ∪ cun 3572 {cpr 4179 ∪ cuni 4436 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-rex 2918 df-v 3202 df-dif 3577 df-un 3579 df-nul 3916 df-sn 4178 df-pr 4180 df-uni 4437 |
This theorem is referenced by: tpex 6957 unexb 6958 fvclex 7138 ralxpmap 7907 unen 8040 enfixsn 8069 sbthlem10 8079 unxpdomlem3 8166 isinf 8173 findcard2 8200 ac6sfi 8204 pwfilem 8260 fiin 8328 cnfcomlem 8596 trcl 8604 tc2 8618 rankxpu 8739 rankxplim 8742 rankxplim3 8744 r0weon 8835 infxpenlem 8836 dfac4 8945 dfac2 8953 kmlem2 8973 cdafn 8991 cfsmolem 9092 isfin1-3 9208 axdc2lem 9270 axdc3lem4 9275 axcclem 9279 ttukeylem3 9333 gchac 9503 wunex2 9560 wuncval2 9569 inar1 9597 nn0ex 11298 xrex 11829 hashbclem 13236 incexclem 14568 ramub1lem2 15731 prdsval 16115 imasval 16171 ipoval 17154 fpwipodrs 17164 plusffval 17247 staffval 18847 scaffval 18881 lpival 19245 psrval 19362 xrsex 19761 ipffval 19993 islindf4 20177 neitr 20984 leordtval2 21016 comppfsc 21335 1stckgen 21357 dfac14 21421 ptcmpfi 21616 hausflim 21785 flimclslem 21788 alexsubALTlem2 21852 nmfval 22393 icccmplem2 22626 tchex 23016 tchnmfval 23027 taylfval 24113 legval 25479 axlowdimlem15 25836 axlowdim 25841 eengv 25859 uhgrunop 25970 upgrunop 26014 umgrunop 26016 padct 29497 ordtconnlem1 29970 sxbrsigalem2 30348 actfunsnf1o 30682 actfunsnrndisj 30683 reprsuc 30693 breprexplema 30708 bnj918 30836 subfacp1lem3 31164 subfacp1lem5 31166 erdszelem8 31180 mrexval 31398 mrsubcv 31407 mrsubff 31409 mrsubccat 31415 elmrsubrn 31417 finixpnum 33394 poimirlem4 33413 poimirlem15 33424 poimirlem28 33437 rrnval 33626 lsatset 34277 ldualset 34412 pclfinN 35186 dvaset 36293 dvhset 36370 hlhilset 37226 elrfi 37257 istopclsd 37263 mzpcompact2lem 37314 eldioph2lem1 37323 eldioph2lem2 37324 eldioph4b 37375 diophren 37377 ttac 37603 pwslnmlem2 37663 dfacbasgrp 37678 mendval 37753 idomsubgmo 37776 superuncl 37873 ssuncl 37875 sssymdifcl 37877 rclexi 37922 trclexi 37927 rtrclexi 37928 dfrtrcl5 37936 dfrcl2 37966 comptiunov2i 37998 cotrclrcl 38034 frege83 38240 frege110 38267 frege133 38290 clsk1indlem3 38341 isotone1 38346 fnchoice 39188 limcresiooub 39874 limcresioolb 39875 fourierdlem48 40371 fourierdlem49 40372 fourierdlem102 40425 fourierdlem114 40437 sge0resplit 40623 elpglem2 42455 |
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