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Mirrors > Home > MPE Home > Th. List > Mathboxes > 2reu8 | Structured version Visualization version Unicode version |
Description: Two equivalent expressions for double restricted existential uniqueness, analogous to 2eu8 2560. Curiously, we can put on either of the internal conjuncts but not both. We can also commute using 2reu7 41191. (Contributed by Alexander van der Vekens, 2-Jul-2017.) |
Ref | Expression |
---|---|
2reu8 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2reu2 41187 | . . 3 | |
2 | 1 | pm5.32i 669 | . 2 |
3 | nfcv 2764 | . . . . 5 | |
4 | nfreu1 3110 | . . . . 5 | |
5 | 3, 4 | nfreu 3114 | . . . 4 |
6 | 5 | reuan 41180 | . . 3 |
7 | ancom 466 | . . . . . 6 | |
8 | 7 | reubii 3128 | . . . . 5 |
9 | nfre1 3005 | . . . . . 6 | |
10 | 9 | reuan 41180 | . . . . 5 |
11 | ancom 466 | . . . . 5 | |
12 | 8, 10, 11 | 3bitri 286 | . . . 4 |
13 | 12 | reubii 3128 | . . 3 |
14 | ancom 466 | . . 3 | |
15 | 6, 13, 14 | 3bitr4ri 293 | . 2 |
16 | 2reu7 41191 | . 2 | |
17 | 2, 15, 16 | 3bitr3ri 291 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wb 196 wa 384 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-nfc 2753 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 |
This theorem is referenced by: (None) |
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