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| Description: Alternate definition of relation. Exercise 2 of [TakeutiZaring] p. 25. |
| Ref | Expression |
|---|---|
| dfrel2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 3427 |
. . 3
| |
| 2 | visset 1809 |
. . . . . . 7
| |
| 3 | visset 1809 |
. . . . . . 7
| |
| 4 | 2, 3 | opelcnv 3293 |
. . . . . 6
|
| 5 | 3, 2 | opelcnv 3293 |
. . . . . 6
|
| 6 | 4, 5 | bitr 173 |
. . . . 5
|
| 7 | 6 | gen2 981 |
. . . 4
|
| 8 | eqrel 3245 |
. . . 4
| |
| 9 | 7, 8 | mpbiri 194 |
. . 3
|
| 10 | 1, 9 | mpan 694 |
. 2
|
| 11 | releq 3238 |
. . 3
| |
| 12 | 1, 11 | mpbii 193 |
. 2
|
| 13 | 10, 12 | impbi 157 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cnvcnv 3478 dfrel3 3481 cnvcnvres 3486 cores2 3499 co01 3501 coi2 3503 relcnvexb 3513 funcnvres2 3562 f1cnv 3657 f1ocnvb 3693 f1ococnv1 3700 ssenen 4490 cnvhmpha 10448 cnvhmphb 10449 cnvhmph 10450 hmphsyma 10451 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-br 2615 df-opab 2662 df-xp 3179 df-rel 3180 df-cnv 3181 |