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Mirrors > Home > ILE Home > Th. List > uniex2 | Unicode version |
Description: The Axiom of Union using the standard abbreviation for union. Given any set , its union exists. (Contributed by NM, 4-Jun-2006.) |
Ref | Expression |
---|---|
uniex2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zfun 4364 | . . . 4 | |
2 | eluni 3747 | . . . . . . 7 | |
3 | 2 | imbi1i 237 | . . . . . 6 |
4 | 3 | albii 1447 | . . . . 5 |
5 | 4 | exbii 1585 | . . . 4 |
6 | 1, 5 | mpbir 145 | . . 3 |
7 | 6 | bm1.3ii 4057 | . 2 |
8 | dfcleq 2134 | . . 3 | |
9 | 8 | exbii 1585 | . 2 |
10 | 7, 9 | mpbir 145 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wal 1330 wceq 1332 wex 1469 wcel 1481 cuni 3744 |
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 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-un 4363 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 df-uni 3745 |
This theorem is referenced by: uniex 4367 |
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