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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 3468), 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 7740 | . 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 2142 Vcvv 3454 ∪ cuni 4871 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5256 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-tru 1572 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-v 3456 df-ss 3921 df-uni 4872 |
| This theorem is used by: iunpw 7768 elxp4 7917 elxp5 7918 1stval 7986 2ndval 7987 fo1st 8004 fo2nd 8005 cnvf1o 8104 brtpos2 8226 naddcllem 8660 ixpsnf1o 8934 dffi3 9389 cnfcom2 9669 cnfcom3lem 9670 cnfcom3 9671 ttrclse 9694 trcl 9695 rankc2 9841 rankxpl 9845 rankxpsuc 9852 acnlem 10039 dfac2a 10120 fin23lem14 10323 fin23lem16 10325 fin23lem17 10328 fin23lem38 10339 fin23lem39 10340 itunisuc 10409 axdc3lem2 10441 axcclem 10447 ac5b 10468 ttukey 10508 wunex2 10729 wuncval2 10738 intgru 10805 pnfex 11268 prdsvallem 17513 prdsval 17514 prdsds 17523 wunfunc 17964 wunnat 18022 arwval 18106 catcfuccl 18181 catcxpccl 18269 zrhval 21668 mreclatdemoBAD 23264 ptbasin2 23746 ptbasfi 23749 dfac14 23786 ptcmplem2 24221 ptcmplem3 24222 ptcmp 24226 cnextfvval 24233 cnextcn 24235 minveclem4a 25600 oldf 28041 madefi 28117 precsexlem10 28420 xrge0tsmsbi 33403 dimval 34000 dimvalfi 34001 locfinreflem 34239 pstmfval 34295 pstmxmet 34296 esumex 34428 msrval 36038 dfrdg2 36293 fvbigcup 36400 ttctr 37032 ttcmin 37035 dfttc2g 37045 ctbssinf 38080 ptrest 38298 heiborlem1 38490 heiborlem3 38492 heibor 38500 dicval 41978 prjcrvfval 43391 aomclem1 43809 dfac21 43821 ntrrn 44876 ntrf 44877 dssmapntrcls 44882 permaxun 45748 fourierdlem70 46918 caragendifcl 47256 cnfsmf 47482 tposideq 49694 setrec1lem3 50495 setrec2fun 50498 |
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