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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 7778 | . 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 2147 Vcvv 3454 ∪ 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5252 ax-un 7772 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-v 3456 df-ss 3901 df-uni 4871 |
| This theorem is used by: iunpw 7806 elxp4 7955 elxp5 7956 1stval 8024 2ndval 8025 fo1st 8042 fo2nd 8043 cnvf1o 8146 brtpos2 8274 naddcllem 8710 ixpsnf1o 8991 dffi3 9447 cnfcom2 9727 cnfcom3lem 9728 cnfcom3 9729 ttrclse 9752 trcl 9753 rankc2 9912 rankxpl 9916 rankxpsuc 9923 setrec1lem3 9993 setrec2fun 9997 acnlem 10151 dfac2a 10232 fin23lem14 10435 fin23lem16 10437 fin23lem17 10440 fin23lem38 10451 fin23lem39 10452 itunisuc 10521 axdc3lem2 10553 axcclem 10559 ac5b 10580 ttukey 10620 wunex2 10847 wuncval2 10856 intgru 10923 pnfex 11386 prdsvallem 17651 prdsval 17652 prdsds 17661 wunfunc 18102 wunnat 18160 arwval 18244 catcfuccl 18319 catcxpccl 18407 zrhval 21840 mreclatdemoBAD 23441 ptbasin2 23924 ptbasfi 23927 dfac14 23964 ptcmplem2 24399 ptcmplem3 24400 ptcmp 24404 cnextfvval 24411 cnextcn 24413 minveclem4a 25778 oldf 28250 precsexlem10 28629 xrge0tsmsbi 33702 dimval 34300 dimvalfi 34301 locfinreflem 34539 pstmfval 34595 pstmxmet 34596 esumex 34728 msrval 36469 dfrdg2 36734 fvbigcup 36841 ttctr 37458 ttcmin 37461 dfttc2g 37471 ctbssinf 38520 ptrest 38728 heiborlem1 38936 heiborlem3 38938 heibor 38946 dicval 42424 prjcrvfval 43858 aomclem1 44247 dfac21 44259 ntrrn 45312 ntrf 45313 dssmapntrcls 45318 permaxun 46194 fourierdlem70 47389 caragendifcl 47727 cnfsmf 47953 tposideq 50204 |
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