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Mirrors > Home > ILE Home > Th. List > reliun | Unicode version |
Description: An indexed union is a relation iff each member of its indexed family is a relation. (Contributed by NM, 19-Dec-2008.) |
Ref | Expression |
---|---|
reliun |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-iun 3815 | . . 3 | |
2 | 1 | releqi 4622 | . 2 |
3 | df-rel 4546 | . 2 | |
4 | abss 3166 | . . 3 | |
5 | df-rel 4546 | . . . . . 6 | |
6 | dfss2 3086 | . . . . . 6 | |
7 | 5, 6 | bitri 183 | . . . . 5 |
8 | 7 | ralbii 2441 | . . . 4 |
9 | ralcom4 2708 | . . . 4 | |
10 | r19.23v 2541 | . . . . 5 | |
11 | 10 | albii 1446 | . . . 4 |
12 | 8, 9, 11 | 3bitri 205 | . . 3 |
13 | 4, 12 | bitr4i 186 | . 2 |
14 | 2, 3, 13 | 3bitri 205 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1329 wcel 1480 cab 2125 wral 2416 wrex 2417 cvv 2686 wss 3071 ciun 3813 cxp 4537 wrel 4544 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-in 3077 df-ss 3084 df-iun 3815 df-rel 4546 |
This theorem is referenced by: reluni 4662 eliunxp 4678 opeliunxp2 4679 dfco2 5038 coiun 5048 opeliunxp2f 6135 fisumcom2 11207 reldvg 12817 |
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