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| Description: Alternate definition of relation. Exercise 2 of [TakeutiZaring] p. 25. |
| Ref | Expression |
|---|---|
| dfrel2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 3432 |
. . 3
| |
| 2 | visset 1811 |
. . . . . . 7
| |
| 3 | visset 1811 |
. . . . . . 7
| |
| 4 | 2, 3 | opelcnv 3295 |
. . . . . 6
|
| 5 | 3, 2 | opelcnv 3295 |
. . . . . 6
|
| 6 | 4, 5 | bitr 173 |
. . . . 5
|
| 7 | 6 | gen2 982 |
. . . 4
|
| 8 | eqrel 3247 |
. . . 4
| |
| 9 | 7, 8 | mpbiri 194 |
. . 3
|
| 10 | 1, 9 | mpan 694 |
. 2
|
| 11 | releq 3240 |
. . 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 3483 dfrel3 3486 cnvcnvres 3491 cores2 3504 co01 3506 coi2 3508 relcnvexb 3518 funcnvres2 3567 f1cnv 3663 f1ocnvb 3699 f1ococnv1 3706 ssenen 4497 cnvhmpha 10506 cnvhmphb 10507 cnvhmph 10508 hmphsyma 10509 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2700 ax-pow 2739 ax-pr 2776 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1586 df-v 1810 df-dif 2047 df-un 2048 df-in 2049 df-ss 2051 df-nul 2279 df-pw 2400 df-sn 2410 df-pr 2411 df-op 2414 df-br 2617 df-opab 2664 df-xp 3181 df-rel 3182 df-cnv 3183 |