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Mirrors > Home > ILE Home > Th. List > moeq | Unicode version |
Description: There is at most one set equal to a class. (Contributed by NM, 8-Mar-1995.) |
Ref | Expression |
---|---|
moeq |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isset 2692 | . . . 4 | |
2 | eueq 2855 | . . . 4 | |
3 | 1, 2 | bitr3i 185 | . . 3 |
4 | 3 | biimpi 119 | . 2 |
5 | df-mo 2003 | . 2 | |
6 | 4, 5 | mpbir 145 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wex 1468 wcel 1480 weu 1999 wmo 2000 cvv 2686 |
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-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-v 2688 |
This theorem is referenced by: euxfr2dc 2869 reueq 2883 mosn 3560 sndisj 3925 disjxsn 3927 reusv1 4379 funopabeq 5159 funcnvsn 5168 fvmptg 5497 fvopab6 5517 ovmpt4g 5893 ovi3 5907 ov6g 5908 oprabex3 6027 1stconst 6118 2ndconst 6119 axaddf 7676 axmulf 7677 |
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