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| Mirrors > Home > ILE Home > Th. List > intasym | Unicode version | ||
| Description: Two ways of saying a relation is antisymmetric. Definition of antisymmetry in [Schechter] p. 51. (Contributed by NM, 9-Sep-2004.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
| Ref | Expression |
|---|---|
| intasym |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 5106 |
. . 3
| |
| 2 | relin2 4838 |
. . 3
| |
| 3 | ssrel 4807 |
. . 3
| |
| 4 | 1, 2, 3 | mp2b 8 |
. 2
|
| 5 | elin 3387 |
. . . . 5
| |
| 6 | df-br 4084 |
. . . . . 6
| |
| 7 | vex 2802 |
. . . . . . . 8
| |
| 8 | vex 2802 |
. . . . . . . 8
| |
| 9 | 7, 8 | brcnv 4905 |
. . . . . . 7
|
| 10 | df-br 4084 |
. . . . . . 7
| |
| 11 | 9, 10 | bitr3i 186 |
. . . . . 6
|
| 12 | 6, 11 | anbi12i 460 |
. . . . 5
|
| 13 | 5, 12 | bitr4i 187 |
. . . 4
|
| 14 | df-br 4084 |
. . . . 5
| |
| 15 | 8 | ideq 4874 |
. . . . 5
|
| 16 | 14, 15 | bitr3i 186 |
. . . 4
|
| 17 | 13, 16 | imbi12i 239 |
. . 3
|
| 18 | 17 | 2albii 1517 |
. 2
|
| 19 | 4, 18 | bitri 184 |
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-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 4202 ax-pow 4258 ax-pr 4293 |
| 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 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-br 4084 df-opab 4146 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 |
| This theorem is referenced by: (None) |
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