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Mirrors > Home > MPE Home > Th. List > euelss | Structured version Visualization version Unicode version |
Description: Transfer uniqueness of an element to a smaller subclass. (Contributed by AV, 14-Apr-2020.) |
Ref | Expression |
---|---|
euelss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . . . 4 | |
2 | df-rex 2918 | . . . . 5 | |
3 | ancom 466 | . . . . . . 7 | |
4 | truan 1501 | . . . . . . 7 | |
5 | 3, 4 | bitri 264 | . . . . . 6 |
6 | 5 | exbii 1774 | . . . . 5 |
7 | 2, 6 | sylbbr 226 | . . . 4 |
8 | df-reu 2919 | . . . . 5 | |
9 | ancom 466 | . . . . . . 7 | |
10 | truan 1501 | . . . . . . 7 | |
11 | 9, 10 | bitri 264 | . . . . . 6 |
12 | 11 | eubii 2492 | . . . . 5 |
13 | 8, 12 | sylbbr 226 | . . . 4 |
14 | reuss 3908 | . . . 4 | |
15 | 1, 7, 13, 14 | syl3an 1368 | . . 3 |
16 | df-reu 2919 | . . 3 | |
17 | 15, 16 | sylib 208 | . 2 |
18 | ancom 466 | . . . 4 | |
19 | 4, 18 | bitr3i 266 | . . 3 |
20 | 19 | eubii 2492 | . 2 |
21 | 17, 20 | sylibr 224 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 w3a 1037 wtru 1484 wex 1704 wcel 1990 weu 2470 wrex 2913 wreu 2914 wss 3574 |
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-3an 1039 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-ral 2917 df-rex 2918 df-reu 2919 df-in 3581 df-ss 3588 |
This theorem is referenced by: initoeu1 16661 termoeu1 16668 |
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