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Mirrors > Home > MPE Home > Th. List > eqeuel | Structured version Visualization version Unicode version |
Description: A condition which implies the existence of a unique element of a class. (Contributed by AV, 4-Jan-2022.) |
Ref | Expression |
---|---|
eqeuel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | n0 3931 | . . . 4 | |
2 | 1 | biimpi 206 | . . 3 |
3 | 2 | anim1i 592 | . 2 |
4 | eleq1w 2684 | . . 3 | |
5 | 4 | eu4 2518 | . 2 |
6 | 3, 5 | sylibr 224 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wal 1481 wex 1704 wcel 1990 weu 2470 wne 2794 c0 3915 |
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-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-v 3202 df-dif 3577 df-nul 3916 |
This theorem is referenced by: frgr2wwlk1 27193 |
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