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| Mirrors > Home > MPE Home > Th. List > uniex | Structured version Visualization version GIF version | ||
| Description: The Axiom of Union in class notation. This says that if 𝐴 is a set i.e. 𝐴 ∈ V (see isset 3453), then the union of 𝐴 is also a set. Same as Axiom 3 of [TakeutiZaring] p. 16. (Contributed by NM, 11-Aug-1993.) |
| Ref | Expression |
|---|---|
| uniex.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| uniex | ⊢ ∪ 𝐴 ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uniex.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | uniexg 7685 | . 2 ⊢ (𝐴 ∈ V → ∪ 𝐴 ∈ V) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ ∪ 𝐴 ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3439 ∪ cuni 4862 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2707 ax-sep 5240 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2714 df-cleq 2727 df-clel 2810 df-v 3441 df-ss 3917 df-uni 4863 |
| This theorem is referenced by: unexOLD 7690 iunpw 7716 elxp4 7864 elxp5 7865 1stval 7935 2ndval 7936 fo1st 7953 fo2nd 7954 cnvf1o 8053 brtpos2 8174 naddcllem 8604 ixpsnf1o 8878 dffi3 9336 cnfcom2 9613 cnfcom3lem 9614 cnfcom3 9615 ttrclse 9638 trcl 9639 rankc2 9785 rankxpl 9789 rankxpsuc 9796 acnlem 9960 dfac2a 10042 fin23lem14 10245 fin23lem16 10247 fin23lem17 10250 fin23lem38 10261 fin23lem39 10262 itunisuc 10331 axdc3lem2 10363 axcclem 10369 ac5b 10390 ttukey 10430 wunex2 10651 wuncval2 10660 intgru 10727 pnfex 11187 prdsvallem 17376 prdsval 17377 prdsds 17386 wunfunc 17827 wunnat 17885 arwval 17969 catcfuccl 18044 catcxpccl 18132 zrhval 21464 mreclatdemoBAD 23042 ptbasin2 23524 ptbasfi 23527 dfac14 23564 ptcmplem2 23999 ptcmplem3 24000 ptcmp 24004 cnextfvval 24011 cnextcn 24013 minveclem4a 25388 oldf 27833 madefi 27893 precsexlem10 28195 xrge0tsmsbi 33135 dimval 33736 dimvalfi 33737 locfinreflem 33976 pstmfval 34032 pstmxmet 34033 esumex 34165 msrval 35711 dfrdg2 35966 fvbigcup 36073 ctbssinf 37580 ptrest 37789 heiborlem1 37981 heiborlem3 37983 heibor 37991 dicval 41471 prjcrvfval 42911 aomclem1 43333 dfac21 43345 ntrrn 44400 ntrf 44401 dssmapntrcls 44406 permaxun 45289 fourierdlem70 46457 caragendifcl 46795 cnfsmf 47021 tposideq 49170 setrec1lem3 49971 setrec2fun 49974 |
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