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Mirrors > Home > ILE Home > Th. List > reuv | Unicode version |
Description: A unique existential quantifier restricted to the universe is unrestricted. (Contributed by NM, 1-Nov-2010.) |
Ref | Expression |
---|---|
reuv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-reu 2421 | . 2 | |
2 | vex 2684 | . . . 4 | |
3 | 2 | biantrur 301 | . . 3 |
4 | 3 | eubii 2006 | . 2 |
5 | 1, 4 | bitr4i 186 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wb 104 wcel 1480 weu 1997 wreu 2416 cvv 2681 |
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-5 1423 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-clab 2124 df-cleq 2130 df-clel 2133 df-reu 2421 df-v 2683 |
This theorem is referenced by: euen1 6689 updjud 6960 |
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