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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 5165 |
. . 3
| |
| 2 | vex 2824 |
. . . . . 6
| |
| 3 | vex 2824 |
. . . . . 6
| |
| 4 | 2, 3 | opelcnv 4962 |
. . . . 5
|
| 5 | 3, 2 | opelcnv 4962 |
. . . . 5
|
| 6 | 4, 5 | bitri 184 |
. . . 4
|
| 7 | 6 | eqrelriv 4868 |
. . 3
|
| 8 | 1, 7 | mpan 428 |
. 2
|
| 9 | releq 4857 |
. . 3
| |
| 10 | 1, 9 | mpbii 148 |
. 2
|
| 11 | 8, 10 | impbii 126 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-br 4131 df-opab 4193 df-xp 4780 df-rel 4781 df-cnv 4782 |
| This theorem is used by: dfrel4v 5239 cnvcnv 5240 cnveqb 5243 dfrel3 5245 cnvcnvres 5251 cnvsn 5270 cores2 5300 co01 5302 coi2 5304 relcnvtr 5307 relcnvexb 5327 funcnvres2 5456 f1cnvcnv 5609 f1ocnv 5652 f1ocnvb 5653 f1ococnv1 5668 isores1 6020 cnvf1o 6461 tposf12 6540 ssenen 7152 relcnvfi 7255 caseinl 7431 caseinr 7432 fsumcnv 12204 fprodcnv 12392 structcnvcnv 13368 hmeocnv 15408 hmeocnvb 15419 |
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