Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > dmsnm | Unicode version |
Description: The domain of a singleton is inhabited iff the singleton argument is an ordered pair. (Contributed by Jim Kingdon, 15-Dec-2018.) |
Ref | Expression |
---|---|
dmsnm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elvv 4596 | . 2 | |
2 | vex 2684 | . . . . 5 | |
3 | 2 | eldm 4731 | . . . 4 |
4 | df-br 3925 | . . . . . 6 | |
5 | vex 2684 | . . . . . . . 8 | |
6 | 2, 5 | opex 4146 | . . . . . . 7 |
7 | 6 | elsn 3538 | . . . . . 6 |
8 | eqcom 2139 | . . . . . 6 | |
9 | 4, 7, 8 | 3bitri 205 | . . . . 5 |
10 | 9 | exbii 1584 | . . . 4 |
11 | 3, 10 | bitr2i 184 | . . 3 |
12 | 11 | exbii 1584 | . 2 |
13 | 1, 12 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1331 wex 1468 wcel 1480 cvv 2681 csn 3522 cop 3525 class class class wbr 3924 cxp 4532 cdm 4534 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-br 3925 df-opab 3985 df-xp 4540 df-dm 4544 |
This theorem is referenced by: rnsnm 5000 dmsn0 5001 dmsn0el 5003 relsn2m 5004 |
Copyright terms: Public domain | W3C validator |