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Mirrors > Home > MPE Home > Th. List > iuncom4 | Structured version Visualization version Unicode version |
Description: Commutation of union with indexed union. (Contributed by Mario Carneiro, 18-Jan-2014.) |
Ref | Expression |
---|---|
iuncom4 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rex 2918 | . . . . . . 7 | |
2 | 1 | rexbii 3041 | . . . . . 6 |
3 | rexcom4 3225 | . . . . . 6 | |
4 | 2, 3 | bitri 264 | . . . . 5 |
5 | r19.41v 3089 | . . . . . 6 | |
6 | 5 | exbii 1774 | . . . . 5 |
7 | 4, 6 | bitri 264 | . . . 4 |
8 | eluni2 4440 | . . . . 5 | |
9 | 8 | rexbii 3041 | . . . 4 |
10 | df-rex 2918 | . . . . 5 | |
11 | eliun 4524 | . . . . . . 7 | |
12 | 11 | anbi1i 731 | . . . . . 6 |
13 | 12 | exbii 1774 | . . . . 5 |
14 | 10, 13 | bitri 264 | . . . 4 |
15 | 7, 9, 14 | 3bitr4i 292 | . . 3 |
16 | eliun 4524 | . . 3 | |
17 | eluni2 4440 | . . 3 | |
18 | 15, 16, 17 | 3bitr4i 292 | . 2 |
19 | 18 | eqriv 2619 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wa 384 wceq 1483 wex 1704 wcel 1990 wrex 2913 cuni 4436 ciun 4520 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-v 3202 df-uni 4437 df-iun 4522 |
This theorem is referenced by: ituniiun 9244 tgidm 20784 txcmplem2 21445 |
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