Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > rexrsb | Structured version Visualization version Unicode version |
Description: An equivalent expression for restricted existence, analogous to exsb 2468. (Contributed by Alexander van der Vekens, 1-Jul-2017.) |
Ref | Expression |
---|---|
rexrsb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexsb 41168 | . 2 | |
2 | alral 2928 | . . . 4 | |
3 | df-ral 2917 | . . . . . 6 | |
4 | 19.27v 1908 | . . . . . . . 8 | |
5 | pm2.04 90 | . . . . . . . . . . 11 | |
6 | eleq1 2689 | . . . . . . . . . . . . 13 | |
7 | 6 | biimprd 238 | . . . . . . . . . . . 12 |
8 | pm2.83 84 | . . . . . . . . . . . 12 | |
9 | 7, 8 | ax-mp 5 | . . . . . . . . . . 11 |
10 | pm2.04 90 | . . . . . . . . . . 11 | |
11 | 5, 9, 10 | 3syl 18 | . . . . . . . . . 10 |
12 | 11 | imp 445 | . . . . . . . . 9 |
13 | 12 | alimi 1739 | . . . . . . . 8 |
14 | 4, 13 | sylbir 225 | . . . . . . 7 |
15 | 14 | ex 450 | . . . . . 6 |
16 | 3, 15 | sylbi 207 | . . . . 5 |
17 | 16 | com12 32 | . . . 4 |
18 | 2, 17 | impbid2 216 | . . 3 |
19 | 18 | rexbiia 3040 | . 2 |
20 | 1, 19 | bitri 264 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wal 1481 wcel 1990 wral 2912 wrex 2913 |
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-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 |
This theorem is referenced by: 2rexrsb 41171 |
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