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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 7757 | . 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 2144 Vcvv 3450 ∪ cuni 4866 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-ss 3896 df-uni 4867 |
| This theorem is used by: iunpw 7785 elxp4 7934 elxp5 7935 1stval 8003 2ndval 8004 fo1st 8021 fo2nd 8022 cnvf1o 8122 brtpos2 8249 naddcllem 8685 ixpsnf1o 8966 dffi3 9423 cnfcom2 9703 cnfcom3lem 9704 cnfcom3 9705 ttrclse 9728 trcl 9729 rankc2 9888 rankxpl 9892 rankxpsuc 9899 setrec1lem3 9969 setrec2fun 9973 acnlem 10127 dfac2a 10208 fin23lem14 10411 fin23lem16 10413 fin23lem17 10416 fin23lem38 10427 fin23lem39 10428 itunisuc 10497 axdc3lem2 10529 axcclem 10535 ac5b 10556 ttukey 10596 wunex2 10823 wuncval2 10832 intgru 10899 pnfex 11362 prdsvallem 17625 prdsval 17626 prdsds 17635 wunfunc 18076 wunnat 18134 arwval 18218 catcfuccl 18293 catcxpccl 18381 zrhval 21813 mreclatdemoBAD 23414 ptbasin2 23897 ptbasfi 23900 dfac14 23937 ptcmplem2 24372 ptcmplem3 24373 ptcmp 24377 cnextfvval 24384 cnextcn 24386 minveclem4a 25751 oldf 28223 precsexlem10 28602 xrge0tsmsbi 33635 dimval 34233 dimvalfi 34234 locfinreflem 34472 pstmfval 34528 pstmxmet 34529 esumex 34661 msrval 36303 dfrdg2 36557 fvbigcup 36664 ttctr 37281 ttcmin 37284 dfttc2g 37294 ctbssinf 38330 ptrest 38538 heiborlem1 38746 heiborlem3 38748 heibor 38756 dicval 42234 prjcrvfval 43668 aomclem1 44056 dfac21 44068 ntrrn 45122 ntrf 45123 dssmapntrcls 45128 permaxun 46001 fourierdlem70 47186 caragendifcl 47524 cnfsmf 47750 tposideq 49996 |
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