| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3222 |
. . 3
| |
| 2 | 1 | alrimivv 1923 |
. 2
|
| 3 | eleq1 2294 |
. . . . . . . . . . 11
| |
| 4 | eleq1 2294 |
. . . . . . . . . . 11
| |
| 5 | 3, 4 | imbi12d 234 |
. . . . . . . . . 10
|
| 6 | 5 | biimprcd 160 |
. . . . . . . . 9
|
| 7 | 6 | 2alimi 1505 |
. . . . . . . 8
|
| 8 | 19.23vv 1932 |
. . . . . . . 8
| |
| 9 | 7, 8 | sylib 122 |
. . . . . . 7
|
| 10 | 9 | com23 78 |
. . . . . 6
|
| 11 | 10 | a2d 26 |
. . . . 5
|
| 12 | 11 | alimdv 1927 |
. . . 4
|
| 13 | df-rel 4738 |
. . . . 5
| |
| 14 | ssalel 3216 |
. . . . 5
| |
| 15 | elvv 4794 |
. . . . . . 7
| |
| 16 | 15 | imbi2i 226 |
. . . . . 6
|
| 17 | 16 | albii 1519 |
. . . . 5
|
| 18 | 13, 14, 17 | 3bitri 206 |
. . . 4
|
| 19 | ssalel 3216 |
. . . 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-opab 4156 df-xp 4737 df-rel 4738 |
| This theorem is referenced by: eqrel 4821 relssi 4823 relssdv 4824 cotr 5125 cnvsym 5127 intasym 5128 intirr 5130 codir 5132 qfto 5133 |
| Copyright terms: Public domain | W3C validator |