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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 5168 |
. . 3
| |
| 2 | vex 2824 |
. . . . . 6
| |
| 3 | vex 2824 |
. . . . . 6
| |
| 4 | 2, 3 | opelcnv 4964 |
. . . . 5
|
| 5 | 3, 2 | opelcnv 4964 |
. . . . 5
|
| 6 | 4, 5 | bitri 184 |
. . . 4
|
| 7 | 6 | eqrelriv 4870 |
. . 3
|
| 8 | 1, 7 | mpan 428 |
. 2
|
| 9 | releq 4859 |
. . 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 4251 ax-pow 4313 ax-pr 4348 |
| 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 4132 df-opab 4194 df-xp 4782 df-rel 4783 df-cnv 4784 |
| This theorem is used by: dfrel4v 5242 cnvcnv 5243 cnveqb 5246 dfrel3 5248 cnvcnvres 5254 cnvsn 5273 cores2 5303 co01 5305 coi2 5307 relcnvtr 5310 relcnvexb 5330 funcnvres2 5459 f1cnvcnv 5612 f1ocnv 5655 f1ocnvb 5656 f1ococnv1 5671 isores1 6023 cnvf1o 6465 tposf12 6544 ssenen 7156 relcnvfi 7259 caseinl 7437 caseinr 7438 fsumcnv 12229 fprodcnv 12417 structcnvcnv 13426 hmeocnv 15533 hmeocnvb 15544 |
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