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| Mirrors > Home > ILE Home > Th. List > cnv0 | Unicode version | ||
| Description: The converse of the empty set. (Contributed by NM, 6-Apr-1998.) |
| Ref | Expression |
|---|---|
| cnv0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 5112 |
. 2
| |
| 2 | rel0 4850 |
. 2
| |
| 3 | vex 2803 |
. . . 4
| |
| 4 | vex 2803 |
. . . 4
| |
| 5 | 3, 4 | opelcnv 4910 |
. . 3
|
| 6 | noel 3496 |
. . . 4
| |
| 7 | noel 3496 |
. . . 4
| |
| 8 | 6, 7 | 2false 706 |
. . 3
|
| 9 | 5, 8 | bitr4i 187 |
. 2
|
| 10 | 1, 2, 9 | eqrelriiv 4818 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-br 4087 df-opab 4149 df-xp 4729 df-rel 4730 df-cnv 4731 |
| This theorem is referenced by: xp0 5154 cnveq0 5191 co01 5249 f10 5614 f1o00 5616 tpos0 6435 |
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