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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 3464), 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 7741 | . 2 ⊢ (𝐴 ∈ V → ∪ 𝐴 ∈ V) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ ∪ 𝐴 ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 Vcvv 3450 ∪ cuni 4867 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-sep 5249 ax-un 7735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-ss 3916 df-uni 4868 |
| This theorem is used by: iunpw 7769 elxp4 7918 elxp5 7919 1stval 7987 2ndval 7988 fo1st 8005 fo2nd 8006 cnvf1o 8106 brtpos2 8228 naddcllem 8664 ixpsnf1o 8945 dffi3 9401 cnfcom2 9681 cnfcom3lem 9682 cnfcom3 9683 ttrclse 9706 trcl 9707 rankc2 9857 rankxpl 9861 rankxpsuc 9868 setrec1lem3 9926 setrec2fun 9930 acnlem 10084 dfac2a 10165 fin23lem14 10368 fin23lem16 10370 fin23lem17 10373 fin23lem38 10384 fin23lem39 10385 itunisuc 10454 axdc3lem2 10486 axcclem 10492 ac5b 10513 ttukey 10553 wunex2 10780 wuncval2 10789 intgru 10856 pnfex 11319 prdsvallem 17572 prdsval 17573 prdsds 17582 wunfunc 18023 wunnat 18081 arwval 18165 catcfuccl 18240 catcxpccl 18328 zrhval 21760 mreclatdemoBAD 23361 ptbasin2 23844 ptbasfi 23847 dfac14 23884 ptcmplem2 24319 ptcmplem3 24320 ptcmp 24324 cnextfvval 24331 cnextcn 24333 minveclem4a 25698 oldf 28142 precsexlem10 28521 xrge0tsmsbi 33554 dimval 34152 dimvalfi 34153 locfinreflem 34391 pstmfval 34447 pstmxmet 34448 esumex 34580 msrval 36218 dfrdg2 36473 fvbigcup 36580 ttctr 37197 ttcmin 37200 dfttc2g 37210 ctbssinf 38243 ptrest 38451 heiborlem1 38659 heiborlem3 38661 heibor 38669 dicval 42147 prjcrvfval 43575 aomclem1 43993 dfac21 44005 ntrrn 45060 ntrf 45061 dssmapntrcls 45066 permaxun 45932 fourierdlem70 47102 caragendifcl 47440 cnfsmf 47666 tposideq 49912 |
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