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| Mirrors > Home > ILE Home > Th. List > dfrel2 | Unicode version | ||
| Description: Alternate definition of relation. Exercise 2 of [TakeutiZaring] p. 25. (Contributed by NM, 29-Dec-1996.) |
| Ref | Expression |
|---|---|
| dfrel2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 5110 |
. . 3
| |
| 2 | vex 2803 |
. . . . . 6
| |
| 3 | vex 2803 |
. . . . . 6
| |
| 4 | 2, 3 | opelcnv 4908 |
. . . . 5
|
| 5 | 3, 2 | opelcnv 4908 |
. . . . 5
|
| 6 | 4, 5 | bitri 184 |
. . . 4
|
| 7 | 6 | eqrelriv 4815 |
. . 3
|
| 8 | 1, 7 | mpan 424 |
. 2
|
| 9 | releq 4804 |
. . 3
| |
| 10 | 1, 9 | mpbii 148 |
. 2
|
| 11 | 8, 10 | impbii 126 |
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 4203 ax-pow 4260 ax-pr 4295 |
| 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-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-br 4085 df-opab 4147 df-xp 4727 df-rel 4728 df-cnv 4729 |
| This theorem is referenced by: dfrel4v 5184 cnvcnv 5185 cnveqb 5188 dfrel3 5190 cnvcnvres 5196 cnvsn 5215 cores2 5245 co01 5247 coi2 5249 relcnvtr 5252 relcnvexb 5272 funcnvres2 5400 f1cnvcnv 5548 f1ocnv 5591 f1ocnvb 5592 f1ococnv1 5607 isores1 5948 cnvf1o 6383 tposf12 6428 ssenen 7030 relcnvfi 7129 caseinl 7279 caseinr 7280 fsumcnv 11985 fprodcnv 12173 structcnvcnv 13085 hmeocnv 15018 hmeocnvb 15029 |
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