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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 3080 | . 2 ⊢ ∀𝑥 ∈ 𝐴 𝐵 ∈ V |
| 4 | iunexg 7961 | . 2 ⊢ ((𝐴 ∈ V ∧ ∀𝑥 ∈ 𝐴 𝐵 ∈ V) → ∪ 𝑥 ∈ 𝐴 𝐵 ∈ V) | |
| 5 | 1, 3, 4 | mp2an 705 | 1 ⊢ ∪ 𝑥 ∈ 𝐴 𝐵 ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 ∀wral 3076 Vcvv 3450 ∪ ciun 4951 |
| 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-11 2194 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-un 7737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-mo 2564 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-v 3452 df-ss 3916 df-uni 4868 df-iun 4953 |
| This theorem is used by: tz9.1 9711 tz9.1c 9712 cplem2 9894 cplem2OLD 9895 fseqdom 10032 pwsdompw 10208 cfsmolem 10275 ac6c4 10486 konigthlem 10580 alephreg 10594 pwfseqlem4 10674 pwfseqlem5 10675 pwxpndom2 10677 wunex2 10750 wuncval2 10759 inar1 10787 rtrclreclem1 15133 dfrtrclrec2 15134 rtrclreclem2 15135 rtrclreclem4 15137 isfunc 17956 smndex1bas 19021 smndex1sgrp 19023 smndex1mnd 19025 smndex1id 19026 dfac14 23847 txcmplem2 23871 cnextfval 24291 bnj893 35440 colinearex 36643 nmulprop 36773 volsupnfl 38417 heiborlem3 38566 comptiunov2i 44549 corclrcl 44550 iunrelexpmin1 44551 trclrelexplem 44554 iunrelexpmin2 44555 dftrcl3 44563 trclfvcom 44566 cnvtrclfv 44567 cotrcltrcl 44568 trclimalb2 44569 trclfvdecomr 44571 dfrtrcl3 44576 dfrtrcl4 44581 corcltrcl 44582 cotrclrcl 44585 carageniuncllem1 47352 carageniuncllem2 47353 carageniuncl 47354 caratheodorylem1 47357 caratheodorylem2 47358 ovnovollem1 47487 ovnovollem2 47488 smfresal 47619 |
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