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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 5114 |
. . 3
| |
| 2 | vex 2805 |
. . . . . 6
| |
| 3 | vex 2805 |
. . . . . 6
| |
| 4 | 2, 3 | opelcnv 4912 |
. . . . 5
|
| 5 | 3, 2 | opelcnv 4912 |
. . . . 5
|
| 6 | 4, 5 | bitri 184 |
. . . 4
|
| 7 | 6 | eqrelriv 4819 |
. . 3
|
| 8 | 1, 7 | mpan 424 |
. 2
|
| 9 | releq 4808 |
. . 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 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-cnv 4733 |
| This theorem is referenced by: dfrel4v 5188 cnvcnv 5189 cnveqb 5192 dfrel3 5194 cnvcnvres 5200 cnvsn 5219 cores2 5249 co01 5251 coi2 5253 relcnvtr 5256 relcnvexb 5276 funcnvres2 5405 f1cnvcnv 5553 f1ocnv 5596 f1ocnvb 5597 f1ococnv1 5612 isores1 5954 cnvf1o 6389 tposf12 6434 ssenen 7036 relcnvfi 7139 caseinl 7289 caseinr 7290 fsumcnv 11997 fprodcnv 12185 structcnvcnv 13097 hmeocnv 15030 hmeocnvb 15041 |
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