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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 3470), 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 7725 | . 2 ⊢ (𝐴 ∈ V → ∪ 𝐴 ∈ V) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ ∪ 𝐴 ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2144 Vcvv 3456 ∪ cuni 4867 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-ext 2736 ax-sep 5248 ax-un 7720 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-tru 1565 df-ex 1802 df-sb 2093 df-clab 2743 df-cleq 2756 df-clel 2839 df-v 3458 df-ss 3923 df-uni 4868 |
| This theorem is referenced by: unexOLD 7730 iunpw 7756 elxp4 7905 elxp5 7906 1stval 7974 2ndval 7975 fo1st 7992 fo2nd 7993 cnvf1o 8092 brtpos2 8214 naddcllem 8648 ixpsnf1o 8922 dffi3 9379 cnfcom2 9659 cnfcom3lem 9660 cnfcom3 9661 ttrclse 9684 trcl 9685 rankc2 9831 rankxpl 9835 rankxpsuc 9842 acnlem 10006 dfac2a 10088 fin23lem14 10292 fin23lem16 10294 fin23lem17 10297 fin23lem38 10308 fin23lem39 10309 itunisuc 10378 axdc3lem2 10410 axcclem 10416 ac5b 10437 ttukey 10477 wunex2 10698 wuncval2 10707 intgru 10774 pnfex 11237 prdsvallem 17485 prdsval 17486 prdsds 17495 wunfunc 17936 wunnat 17994 arwval 18078 catcfuccl 18153 catcxpccl 18241 zrhval 21561 mreclatdemoBAD 23158 ptbasin2 23640 ptbasfi 23643 dfac14 23680 ptcmplem2 24115 ptcmplem3 24116 ptcmp 24120 cnextfvval 24127 cnextcn 24129 minveclem4a 25494 oldf 27932 madefi 28008 precsexlem10 28311 xrge0tsmsbi 33256 dimval 33900 dimvalfi 33901 locfinreflem 34139 pstmfval 34195 pstmxmet 34196 esumex 34328 msrval 35893 dfrdg2 36148 fvbigcup 36255 ttctr 36858 ttcmin 36861 dfttc2g 36871 ctbssinf 37905 ptrest 38123 heiborlem1 38315 heiborlem3 38317 heibor 38325 dicval 41805 prjcrvfval 43218 aomclem1 43636 dfac21 43648 ntrrn 44703 ntrf 44704 dssmapntrcls 44709 permaxun 45592 fourierdlem70 46755 caragendifcl 47093 cnfsmf 47319 tposideq 49514 setrec1lem3 50315 setrec2fun 50318 |
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