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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 4731 | . . 3 | |
2 | nfopab1 4051 | . . . 4 | |
3 | nfopab2 4052 | . . . 4 | |
4 | 2, 3 | dffun6f 5201 | . . 3 |
5 | 1, 4 | mpbiran 930 | . 2 |
6 | df-br 3983 | . . . . 5 | |
7 | opabid 4235 | . . . . 5 | |
8 | 6, 7 | bitri 183 | . . . 4 |
9 | 8 | mobii 2051 | . . 3 |
10 | 9 | albii 1458 | . 2 |
11 | 5, 10 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wal 1341 wmo 2015 wcel 2136 cop 3579 class class class wbr 3982 copab 4042 wrel 4609 wfun 5182 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-fun 5190 |
This theorem is referenced by: funopabeq 5224 isarep2 5275 fnopabg 5311 fvopab3ig 5560 opabex 5709 funoprabg 5941 |
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