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| Mirrors > Home > ILE Home > Th. List > ssrel | Unicode version | ||
| Description: A subclass relationship depends only on a relation's ordered pairs. Theorem 3.2(i) of [Monk1] p. 33. (Contributed by NM, 2-Aug-1994.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
| Ref | Expression |
|---|---|
| ssrel |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssel 3218 |
. . 3
| |
| 2 | 1 | alrimivv 1921 |
. 2
|
| 3 | eleq1 2292 |
. . . . . . . . . . 11
| |
| 4 | eleq1 2292 |
. . . . . . . . . . 11
| |
| 5 | 3, 4 | imbi12d 234 |
. . . . . . . . . 10
|
| 6 | 5 | biimprcd 160 |
. . . . . . . . 9
|
| 7 | 6 | 2alimi 1502 |
. . . . . . . 8
|
| 8 | 19.23vv 1930 |
. . . . . . . 8
| |
| 9 | 7, 8 | sylib 122 |
. . . . . . 7
|
| 10 | 9 | com23 78 |
. . . . . 6
|
| 11 | 10 | a2d 26 |
. . . . 5
|
| 12 | 11 | alimdv 1925 |
. . . 4
|
| 13 | df-rel 4725 |
. . . . 5
| |
| 14 | ssalel 3212 |
. . . . 5
| |
| 15 | elvv 4780 |
. . . . . . 7
| |
| 16 | 15 | imbi2i 226 |
. . . . . 6
|
| 17 | 16 | albii 1516 |
. . . . 5
|
| 18 | 13, 14, 17 | 3bitri 206 |
. . . 4
|
| 19 | ssalel 3212 |
. . . 4
| |
| 20 | 12, 18, 19 | 3imtr4g 205 |
. . 3
|
| 21 | 20 | com12 30 |
. 2
|
| 22 | 2, 21 | impbid2 143 |
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 4201 ax-pow 4257 ax-pr 4292 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 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-opab 4145 df-xp 4724 df-rel 4725 |
| This theorem is referenced by: eqrel 4807 relssi 4809 relssdv 4810 cotr 5109 cnvsym 5111 intasym 5112 intirr 5114 codir 5116 qfto 5117 |
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