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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 1020 |
. . . 4
| |
| 2 | 3simpa 1020 |
. . . 4
| |
| 3 | simp1 1023 |
. . . 4
| |
| 4 | funprg 5380 |
. . . 4
| |
| 5 | 1, 2, 3, 4 | syl3an 1315 |
. . 3
|
| 6 | simp13 1055 |
. . . 4
| |
| 7 | simp23 1058 |
. . . 4
| |
| 8 | funsng 5376 |
. . . 4
| |
| 9 | 6, 7, 8 | syl2anc 411 |
. . 3
|
| 10 | 2 | 3ad2ant2 1045 |
. . . . . 6
|
| 11 | dmpropg 5209 |
. . . . . 6
| |
| 12 | 10, 11 | syl 14 |
. . . . 5
|
| 13 | dmsnopg 5208 |
. . . . . 6
| |
| 14 | 7, 13 | syl 14 |
. . . . 5
|
| 15 | 12, 14 | ineq12d 3409 |
. . . 4
|
| 16 | elpri 3692 |
. . . . . . . 8
| |
| 17 | nner 2406 |
. . . . . . . . . . . 12
| |
| 18 | 17 | eqcoms 2234 |
. . . . . . . . . . 11
|
| 19 | 3mix2 1193 |
. . . . . . . . . . 11
| |
| 20 | 18, 19 | syl 14 |
. . . . . . . . . 10
|
| 21 | nner 2406 |
. . . . . . . . . . . 12
| |
| 22 | 21 | eqcoms 2234 |
. . . . . . . . . . 11
|
| 23 | 3mix3 1194 |
. . . . . . . . . . 11
| |
| 24 | 22, 23 | syl 14 |
. . . . . . . . . 10
|
| 25 | 20, 24 | jaoi 723 |
. . . . . . . . 9
|
| 26 | 3ianorr 1345 |
. . . . . . . . 9
| |
| 27 | 25, 26 | syl 14 |
. . . . . . . 8
|
| 28 | 16, 27 | syl 14 |
. . . . . . 7
|
| 29 | 28 | con2i 632 |
. . . . . 6
|
| 30 | disjsn 3731 |
. . . . . 6
| |
| 31 | 29, 30 | sylibr 134 |
. . . . 5
|
| 32 | 31 | 3ad2ant3 1046 |
. . . 4
|
| 33 | 15, 32 | eqtrd 2264 |
. . 3
|
| 34 | funun 5371 |
. . 3
| |
| 35 | 5, 9, 33, 34 | syl21anc 1272 |
. 2
|
| 36 | df-tp 3677 |
. . 3
| |
| 37 | 36 | funeqi 5347 |
. 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-tp 3677 df-op 3678 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-fun 5328 |
| This theorem is referenced by: fntpg 5386 |
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