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| Mirrors > Home > ILE Home > Th. List > funtpg | Unicode version | ||
| Description: A set of three pairs is a function if their first members are different. (Contributed by Alexander van der Vekens, 5-Dec-2017.) |
| Ref | Expression |
|---|---|
| funtpg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3simpa 1025 |
. . . 4
| |
| 2 | 3simpa 1025 |
. . . 4
| |
| 3 | simp1 1028 |
. . . 4
| |
| 4 | funprg 5426 |
. . . 4
| |
| 5 | 1, 2, 3, 4 | syl3an 1320 |
. . 3
|
| 6 | simp13 1060 |
. . . 4
| |
| 7 | simp23 1063 |
. . . 4
| |
| 8 | funsng 5422 |
. . . 4
| |
| 9 | 6, 7, 8 | syl2anc 415 |
. . 3
|
| 10 | 2 | 3ad2ant2 1050 |
. . . . . 6
|
| 11 | dmpropg 5255 |
. . . . . 6
| |
| 12 | 10, 11 | syl 14 |
. . . . 5
|
| 13 | dmsnopg 5254 |
. . . . . 6
| |
| 14 | 7, 13 | syl 14 |
. . . . 5
|
| 15 | 12, 14 | ineq12d 3433 |
. . . 4
|
| 16 | elpri 3728 |
. . . . . . . 8
| |
| 17 | nner 2424 |
. . . . . . . . . . . 12
| |
| 18 | 17 | eqcoms 2241 |
. . . . . . . . . . 11
|
| 19 | 3mix2 1198 |
. . . . . . . . . . 11
| |
| 20 | 18, 19 | syl 14 |
. . . . . . . . . 10
|
| 21 | nner 2424 |
. . . . . . . . . . . 12
| |
| 22 | 21 | eqcoms 2241 |
. . . . . . . . . . 11
|
| 23 | 3mix3 1199 |
. . . . . . . . . . 11
| |
| 24 | 22, 23 | syl 14 |
. . . . . . . . . 10
|
| 25 | 20, 24 | jaoi 728 |
. . . . . . . . 9
|
| 26 | 3ianorr 1350 |
. . . . . . . . 9
| |
| 27 | 25, 26 | syl 14 |
. . . . . . . 8
|
| 28 | 16, 27 | syl 14 |
. . . . . . 7
|
| 29 | 28 | con2i 636 |
. . . . . 6
|
| 30 | disjsn 3767 |
. . . . . 6
| |
| 31 | 29, 30 | sylibr 134 |
. . . . 5
|
| 32 | 31 | 3ad2ant3 1051 |
. . . 4
|
| 33 | 15, 32 | eqtrd 2271 |
. . 3
|
| 34 | funun 5417 |
. . 3
| |
| 35 | 5, 9, 33, 34 | syl21anc 1277 |
. 2
|
| 36 | df-tp 3713 |
. . 3
| |
| 37 | 36 | funeqi 5393 |
. 2
|
| 38 | 35, 37 | sylibr 134 |
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-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 |
| This theorem depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3687 df-sn 3711 df-pr 3712 df-tp 3713 df-op 3714 df-br 4126 df-opab 4188 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-fun 5374 |
| This theorem is referenced by: fntpg 5432 |
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