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| Mirrors > Home > ILE Home > Th. List > funopab | Unicode version | ||
| Description: A class of ordered pairs is a function when there is at most one second member for each pair. (Contributed by NM, 16-May-1995.) |
| Ref | Expression |
|---|---|
| funopab |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relopab 4854 |
. . 3
| |
| 2 | nfopab1 4156 |
. . . 4
| |
| 3 | nfopab2 4157 |
. . . 4
| |
| 4 | 2, 3 | dffun6f 5337 |
. . 3
|
| 5 | 1, 4 | mpbiran 946 |
. 2
|
| 6 | df-br 4087 |
. . . . 5
| |
| 7 | opabid 4348 |
. . . . 5
| |
| 8 | 6, 7 | bitri 184 |
. . . 4
|
| 9 | 8 | mobii 2114 |
. . 3
|
| 10 | 9 | albii 1516 |
. 2
|
| 11 | 5, 10 | bitri 184 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-br 4087 df-opab 4149 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-fun 5326 |
| This theorem is referenced by: funopabeq 5360 isarep2 5414 fnopabg 5453 fvopab3ig 5716 opabex 5873 funoprabg 6115 |
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