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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 3455), 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 7687 | . 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 3441 ∪ cuni 4864 |
| 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 2709 ax-sep 5242 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3443 df-ss 3919 df-uni 4865 |
| This theorem is referenced by: unexOLD 7692 iunpw 7718 elxp4 7866 elxp5 7867 1stval 7937 2ndval 7938 fo1st 7955 fo2nd 7956 cnvf1o 8055 brtpos2 8176 naddcllem 8606 ixpsnf1o 8880 dffi3 9338 cnfcom2 9615 cnfcom3lem 9616 cnfcom3 9617 ttrclse 9640 trcl 9641 rankc2 9787 rankxpl 9791 rankxpsuc 9798 acnlem 9962 dfac2a 10044 fin23lem14 10247 fin23lem16 10249 fin23lem17 10252 fin23lem38 10263 fin23lem39 10264 itunisuc 10333 axdc3lem2 10365 axcclem 10371 ac5b 10392 ttukey 10432 wunex2 10653 wuncval2 10662 intgru 10729 pnfex 11189 prdsvallem 17378 prdsval 17379 prdsds 17388 wunfunc 17829 wunnat 17887 arwval 17971 catcfuccl 18046 catcxpccl 18134 zrhval 21466 mreclatdemoBAD 23044 ptbasin2 23526 ptbasfi 23529 dfac14 23566 ptcmplem2 24001 ptcmplem3 24002 ptcmp 24006 cnextfvval 24013 cnextcn 24015 minveclem4a 25390 oldf 27837 madefi 27913 precsexlem10 28216 xrge0tsmsbi 33158 dimval 33759 dimvalfi 33760 locfinreflem 33999 pstmfval 34055 pstmxmet 34056 esumex 34188 msrval 35734 dfrdg2 35989 fvbigcup 36096 ctbssinf 37613 ptrest 37822 heiborlem1 38014 heiborlem3 38016 heibor 38024 dicval 41504 prjcrvfval 42941 aomclem1 43363 dfac21 43375 ntrrn 44430 ntrf 44431 dssmapntrcls 44436 permaxun 45319 fourierdlem70 46487 caragendifcl 46825 cnfsmf 47051 tposideq 49200 setrec1lem3 50001 setrec2fun 50004 |
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