Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > funmo | Unicode version |
Description: A function has at most one value for each argument. (Contributed by NM, 24-May-1998.) |
Ref | Expression |
---|---|
funmo |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dffun6 5132 | . . . . . 6 | |
2 | 1 | simplbi 272 | . . . . 5 |
3 | brrelex 4574 | . . . . . 6 | |
4 | 3 | ex 114 | . . . . 5 |
5 | 2, 4 | syl 14 | . . . 4 |
6 | 5 | ancrd 324 | . . 3 |
7 | 6 | alrimiv 1846 | . 2 |
8 | breq1 3927 | . . . . . . 7 | |
9 | 8 | mobidv 2033 | . . . . . 6 |
10 | 9 | imbi2d 229 | . . . . 5 |
11 | 1 | simprbi 273 | . . . . . 6 |
12 | 11 | 19.21bi 1537 | . . . . 5 |
13 | 10, 12 | vtoclg 2741 | . . . 4 |
14 | 13 | com12 30 | . . 3 |
15 | moanimv 2072 | . . 3 | |
16 | 14, 15 | sylibr 133 | . 2 |
17 | moim 2061 | . 2 | |
18 | 7, 16, 17 | sylc 62 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wal 1329 wceq 1331 wcel 1480 wmo 1998 cvv 2681 class class class wbr 3924 wrel 4539 wfun 5112 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-br 3925 df-opab 3985 df-id 4210 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-fun 5120 |
This theorem is referenced by: funeu 5143 funco 5158 imadif 5198 fneu 5222 dff3im 5558 shftfn 10589 |
Copyright terms: Public domain | W3C validator |