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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 3441), 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 7683 | . 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 3427 ∪ cuni 4840 |
| 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 5220 ax-un 7678 |
| 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 3429 df-ss 3902 df-uni 4841 |
| This theorem is referenced by: unexOLD 7688 iunpw 7714 elxp4 7862 elxp5 7863 1stval 7933 2ndval 7934 fo1st 7951 fo2nd 7952 cnvf1o 8050 brtpos2 8171 naddcllem 8601 ixpsnf1o 8875 dffi3 9333 cnfcom2 9612 cnfcom3lem 9613 cnfcom3 9614 ttrclse 9637 trcl 9638 rankc2 9784 rankxpl 9788 rankxpsuc 9795 acnlem 9959 dfac2a 10041 fin23lem14 10244 fin23lem16 10246 fin23lem17 10249 fin23lem38 10260 fin23lem39 10261 itunisuc 10330 axdc3lem2 10362 axcclem 10368 ac5b 10389 ttukey 10429 wunex2 10650 wuncval2 10659 intgru 10726 pnfex 11187 prdsvallem 17406 prdsval 17407 prdsds 17416 wunfunc 17857 wunnat 17915 arwval 17999 catcfuccl 18074 catcxpccl 18162 zrhval 21476 mreclatdemoBAD 23049 ptbasin2 23531 ptbasfi 23534 dfac14 23571 ptcmplem2 24006 ptcmplem3 24007 ptcmp 24011 cnextfvval 24018 cnextcn 24020 minveclem4a 25385 oldf 27817 madefi 27893 precsexlem10 28196 xrge0tsmsbi 33123 dimval 33733 dimvalfi 33734 locfinreflem 33972 pstmfval 34028 pstmxmet 34029 esumex 34161 msrval 35708 dfrdg2 35963 fvbigcup 36070 ttctr 36663 ttcmin 36666 dfttc2g 36676 ctbssinf 37710 ptrest 37928 heiborlem1 38120 heiborlem3 38122 heibor 38130 dicval 41610 prjcrvfval 43052 aomclem1 43470 dfac21 43482 ntrrn 44537 ntrf 44538 dssmapntrcls 44543 permaxun 45426 fourierdlem70 46592 caragendifcl 46930 cnfsmf 47156 tposideq 49351 setrec1lem3 50152 setrec2fun 50155 |
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