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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 3467), 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 7745 | . 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 3453 ∪ cuni 4870 |
| 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 2734 ax-sep 5255 ax-un 7739 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-v 3455 df-ss 3919 df-uni 4871 |
| This theorem is used by: iunpw 7773 elxp4 7922 elxp5 7923 1stval 7991 2ndval 7992 fo1st 8009 fo2nd 8010 cnvf1o 8111 brtpos2 8233 naddcllem 8667 ixpsnf1o 8948 dffi3 9404 cnfcom2 9684 cnfcom3lem 9685 cnfcom3 9686 ttrclse 9709 trcl 9710 rankc2 9856 rankxpl 9860 rankxpsuc 9867 acnlem 10054 dfac2a 10135 fin23lem14 10338 fin23lem16 10340 fin23lem17 10343 fin23lem38 10354 fin23lem39 10355 itunisuc 10424 axdc3lem2 10456 axcclem 10462 ac5b 10483 ttukey 10523 wunex2 10750 wuncval2 10759 intgru 10826 pnfex 11289 prdsvallem 17543 prdsval 17544 prdsds 17553 wunfunc 17994 wunnat 18052 arwval 18136 catcfuccl 18211 catcxpccl 18299 zrhval 21721 mreclatdemoBAD 23322 ptbasin2 23805 ptbasfi 23808 dfac14 23845 ptcmplem2 24280 ptcmplem3 24281 ptcmp 24285 cnextfvval 24292 cnextcn 24294 minveclem4a 25659 oldf 28100 precsexlem10 28479 xrge0tsmsbi 33501 dimval 34098 dimvalfi 34099 locfinreflem 34337 pstmfval 34393 pstmxmet 34394 esumex 34526 msrval 36104 dfrdg2 36359 fvbigcup 36466 ttctr 37099 ttcmin 37102 dfttc2g 37112 ctbssinf 38147 ptrest 38355 heiborlem1 38548 heiborlem3 38550 heibor 38558 dicval 42036 prjcrvfval 43464 aomclem1 43882 dfac21 43894 ntrrn 44949 ntrf 44950 dssmapntrcls 44955 permaxun 45821 fourierdlem70 46991 caragendifcl 47329 cnfsmf 47555 tposideq 49801 setrec1lem3 50602 setrec2fun 50605 |
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