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Mirrors > Home > MPE Home > Th. List > reu2 | Structured version Visualization version Unicode version |
Description: A way to express restricted uniqueness. (Contributed by NM, 22-Nov-1994.) |
Ref | Expression |
---|---|
reu2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1843 | . . 3 | |
2 | 1 | eu2 2509 | . 2 |
3 | df-reu 2919 | . 2 | |
4 | df-rex 2918 | . . 3 | |
5 | df-ral 2917 | . . . 4 | |
6 | 19.21v 1868 | . . . . . 6 | |
7 | nfv 1843 | . . . . . . . . . . . . 13 | |
8 | nfs1v 2437 | . . . . . . . . . . . . 13 | |
9 | 7, 8 | nfan 1828 | . . . . . . . . . . . 12 |
10 | eleq1 2689 | . . . . . . . . . . . . 13 | |
11 | sbequ12 2111 | . . . . . . . . . . . . 13 | |
12 | 10, 11 | anbi12d 747 | . . . . . . . . . . . 12 |
13 | 9, 12 | sbie 2408 | . . . . . . . . . . 11 |
14 | 13 | anbi2i 730 | . . . . . . . . . 10 |
15 | an4 865 | . . . . . . . . . 10 | |
16 | 14, 15 | bitri 264 | . . . . . . . . 9 |
17 | 16 | imbi1i 339 | . . . . . . . 8 |
18 | impexp 462 | . . . . . . . 8 | |
19 | impexp 462 | . . . . . . . 8 | |
20 | 17, 18, 19 | 3bitri 286 | . . . . . . 7 |
21 | 20 | albii 1747 | . . . . . 6 |
22 | df-ral 2917 | . . . . . . 7 | |
23 | 22 | imbi2i 326 | . . . . . 6 |
24 | 6, 21, 23 | 3bitr4i 292 | . . . . 5 |
25 | 24 | albii 1747 | . . . 4 |
26 | 5, 25 | bitr4i 267 | . . 3 |
27 | 4, 26 | anbi12i 733 | . 2 |
28 | 2, 3, 27 | 3bitr4i 292 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wal 1481 wex 1704 wsb 1880 wcel 1990 weu 2470 wral 2912 wrex 2913 wreu 2914 |
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-cleq 2615 df-clel 2618 df-ral 2917 df-rex 2918 df-reu 2919 |
This theorem is referenced by: reu2eqd 3403 disjinfi 39380 |
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