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| Mirrors > Home > ILE Home > Th. List > cotr | Unicode version | ||
| Description: Two ways of saying a relation is transitive. Definition of transitivity in [Schechter] p. 51. (Contributed by NM, 27-Dec-1996.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
| Ref | Expression |
|---|---|
| cotr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-co 4734 |
. . . 4
| |
| 2 | 1 | relopabi 4855 |
. . 3
|
| 3 | ssrel 4814 |
. . 3
| |
| 4 | 2, 3 | ax-mp 5 |
. 2
|
| 5 | vex 2805 |
. . . . . . . 8
| |
| 6 | vex 2805 |
. . . . . . . 8
| |
| 7 | 5, 6 | opelco 4902 |
. . . . . . 7
|
| 8 | df-br 4089 |
. . . . . . . 8
| |
| 9 | 8 | bicomi 132 |
. . . . . . 7
|
| 10 | 7, 9 | imbi12i 239 |
. . . . . 6
|
| 11 | 19.23v 1931 |
. . . . . 6
| |
| 12 | 10, 11 | bitr4i 187 |
. . . . 5
|
| 13 | 12 | albii 1518 |
. . . 4
|
| 14 | alcom 1526 |
. . . 4
| |
| 15 | 13, 14 | bitri 184 |
. . 3
|
| 16 | 15 | albii 1518 |
. 2
|
| 17 | 4, 16 | 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-rel 4732 df-co 4734 |
| This theorem is referenced by: xpidtr 5127 trin2 5128 dfer2 6702 |
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