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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 901 | . . . 4 | |
2 | 3simpa 901 | . . . 4 | |
3 | simp1 904 | . . . 4 | |
4 | funprg 4949 | . . . 4 | |
5 | 1, 2, 3, 4 | syl3an 1177 | . . 3 |
6 | simp13 936 | . . . 4 | |
7 | simp23 939 | . . . 4 | |
8 | funsng 4946 | . . . 4 | |
9 | 6, 7, 8 | syl2anc 391 | . . 3 |
10 | 2 | 3ad2ant2 926 | . . . . . 6 |
11 | dmpropg 4793 | . . . . . 6 | |
12 | 10, 11 | syl 14 | . . . . 5 |
13 | dmsnopg 4792 | . . . . . 6 | |
14 | 7, 13 | syl 14 | . . . . 5 |
15 | 12, 14 | ineq12d 3139 | . . . 4 |
16 | elpri 3398 | . . . . . . . 8 | |
17 | nner 2210 | . . . . . . . . . . . 12 | |
18 | 17 | eqcoms 2043 | . . . . . . . . . . 11 |
19 | 3mix2 1074 | . . . . . . . . . . 11 | |
20 | 18, 19 | syl 14 | . . . . . . . . . 10 |
21 | nner 2210 | . . . . . . . . . . . 12 | |
22 | 21 | eqcoms 2043 | . . . . . . . . . . 11 |
23 | 3mix3 1075 | . . . . . . . . . . 11 | |
24 | 22, 23 | syl 14 | . . . . . . . . . 10 |
25 | 20, 24 | jaoi 636 | . . . . . . . . 9 |
26 | 3ianorr 1204 | . . . . . . . . 9 | |
27 | 25, 26 | syl 14 | . . . . . . . 8 |
28 | 16, 27 | syl 14 | . . . . . . 7 |
29 | 28 | con2i 557 | . . . . . 6 |
30 | disjsn 3432 | . . . . . 6 | |
31 | 29, 30 | sylibr 137 | . . . . 5 |
32 | 31 | 3ad2ant3 927 | . . . 4 |
33 | 15, 32 | eqtrd 2072 | . . 3 |
34 | funun 4944 | . . 3 | |
35 | 5, 9, 33, 34 | syl21anc 1134 | . 2 |
36 | df-tp 3383 | . . 3 | |
37 | 36 | funeqi 4922 | . 2 |
38 | 35, 37 | sylibr 137 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 97 wo 629 w3o 884 w3a 885 wceq 1243 wcel 1393 wne 2204 cun 2915 cin 2916 c0 3224 csn 3375 cpr 3376 ctp 3377 cop 3378 cdm 4345 wfun 4896 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3or 886 df-3an 887 df-tru 1246 df-fal 1249 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ne 2206 df-ral 2311 df-rex 2312 df-v 2559 df-dif 2920 df-un 2922 df-in 2924 df-ss 2931 df-nul 3225 df-pw 3361 df-sn 3381 df-pr 3382 df-tp 3383 df-op 3384 df-br 3765 df-opab 3819 df-id 4030 df-xp 4351 df-rel 4352 df-cnv 4353 df-co 4354 df-dm 4355 df-fun 4904 |
This theorem is referenced by: fntpg 4955 |
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