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| Mirrors > Home > ILE Home > Th. List > f1osng | Unicode version | ||
| Description: A singleton of an ordered pair is one-to-one onto function. (Contributed by Mario Carneiro, 12-Jan-2013.) |
| Ref | Expression |
|---|---|
| f1osng |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sneq 3678 |
. . . 4
| |
| 2 | f1oeq2 5569 |
. . . 4
| |
| 3 | 1, 2 | syl 14 |
. . 3
|
| 4 | opeq1 3860 |
. . . . 5
| |
| 5 | 4 | sneqd 3680 |
. . . 4
|
| 6 | f1oeq1 5568 |
. . . 4
| |
| 7 | 5, 6 | syl 14 |
. . 3
|
| 8 | 3, 7 | bitrd 188 |
. 2
|
| 9 | sneq 3678 |
. . . 4
| |
| 10 | f1oeq3 5570 |
. . . 4
| |
| 11 | 9, 10 | syl 14 |
. . 3
|
| 12 | opeq2 3861 |
. . . . 5
| |
| 13 | 12 | sneqd 3680 |
. . . 4
|
| 14 | f1oeq1 5568 |
. . . 4
| |
| 15 | 13, 14 | syl 14 |
. . 3
|
| 16 | 11, 15 | bitrd 188 |
. 2
|
| 17 | vex 2803 |
. . 3
| |
| 18 | vex 2803 |
. . 3
| |
| 19 | 17, 18 | f1osn 5621 |
. 2
|
| 20 | 8, 16, 19 | vtocl2g 2866 |
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-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-br 4087 df-opab 4149 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-fun 5326 df-fn 5327 df-f 5328 df-f1 5329 df-fo 5330 df-f1o 5331 |
| This theorem is referenced by: f1sng 5623 f1oprg 5625 fsnunf 5849 dif1en 7061 1fv 10364 zfz1isolem1 11094 sumsnf 11960 prodsnf 12143 ennnfonelemhf1o 13024 |
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