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| Mirrors > Home > MPE Home > Th. List > iunex | Structured version Visualization version GIF version | ||
| Description: The existence of an indexed union. 𝑥 is normally a free-variable parameter in the class expression substituted for 𝐵, which can be read informally as 𝐵(𝑥). (Contributed by NM, 13-Oct-2003.) |
| Ref | Expression |
|---|---|
| iunex.1 | ⊢ 𝐴 ∈ V |
| iunex.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| iunex | ⊢ ∪ 𝑥 ∈ 𝐴 𝐵 ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iunex.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | iunex.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 3 | 2 | rgenw 3082 | . 2 ⊢ ∀𝑥 ∈ 𝐴 𝐵 ∈ V |
| 4 | iunexg 7958 | . 2 ⊢ ((𝐴 ∈ V ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ V) → ∪ 𝑥 ∈ 𝐴 𝐵 ∈ V) | |
| 5 | 1, 3, 4 | mp2an 704 | 1 ⊢ ∪ 𝑥 ∈ 𝐴 𝐵 ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2142 ∀wral 3078 Vcvv 3454 ∪ ciun 4955 |
| 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-11 2191 ax-ext 2734 ax-rep 5237 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-mo 2566 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-v 3456 df-ss 3921 df-uni 4872 df-iun 4957 |
| This theorem is used by: tz9.1 9696 tz9.1c 9697 cplem2 9879 cplem2OLD 9880 fseqdom 10017 pwsdompw 10193 cfsmolem 10260 ac6c4 10471 konigthlem 10559 alephreg 10573 pwfseqlem4 10653 pwfseqlem5 10654 pwxpndom2 10656 wunex2 10729 wuncval2 10738 inar1 10766 rtrclreclem1 15101 dfrtrclrec2 15102 rtrclreclem2 15103 rtrclreclem4 15105 isfunc 17927 smndex1bas 18974 smndex1sgrp 18976 smndex1mnd 18978 smndex1id 18979 dfac14 23786 txcmplem2 23810 cnextfval 24230 bnj893 35325 colinearex 36560 nmulprop 36690 volsupnfl 38344 heiborlem3 38492 comptiunov2i 44460 corclrcl 44461 iunrelexpmin1 44462 trclrelexplem 44465 iunrelexpmin2 44466 dftrcl3 44474 trclfvcom 44477 cnvtrclfv 44478 cotrcltrcl 44479 trclimalb2 44480 trclfvdecomr 44482 dfrtrcl3 44487 dfrtrcl4 44492 corcltrcl 44493 cotrclrcl 44496 carageniuncllem1 47263 carageniuncllem2 47264 carageniuncl 47265 caratheodorylem1 47268 caratheodorylem2 47269 ovnovollem1 47398 ovnovollem2 47399 smfresal 47530 |
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