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| Mirrors > Home > ILE Home > Th. List > dffun5r | Unicode version | ||
| Description: A way of proving a relation is a function, analogous to mo2r 1993. (Contributed by Jim Kingdon, 27-May-2020.) |
| Ref | Expression |
|---|---|
| dffun5r |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1461 |
. . . . . 6
| |
| 2 | 1 | mo2r 1993 |
. . . . 5
|
| 3 | opeq2 3571 |
. . . . . . 7
| |
| 4 | 3 | eleq1d 2147 |
. . . . . 6
|
| 5 | 4 | mo4 2002 |
. . . . 5
|
| 6 | 2, 5 | sylib 120 |
. . . 4
|
| 7 | 6 | alimi 1384 |
. . 3
|
| 8 | 7 | anim2i 334 |
. 2
|
| 9 | dffun4 4933 |
. 2
| |
| 10 | 8, 9 | sylibr 132 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
| This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-br 3786 df-opab 3840 df-id 4048 df-cnv 4371 df-co 4372 df-fun 4924 |
| This theorem is referenced by: (None) |
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