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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 3644 |
. . . 4
| |
| 2 | f1oeq2 5511 |
. . . 4
| |
| 3 | 1, 2 | syl 14 |
. . 3
|
| 4 | opeq1 3819 |
. . . . 5
| |
| 5 | 4 | sneqd 3646 |
. . . 4
|
| 6 | f1oeq1 5510 |
. . . 4
| |
| 7 | 5, 6 | syl 14 |
. . 3
|
| 8 | 3, 7 | bitrd 188 |
. 2
|
| 9 | sneq 3644 |
. . . 4
| |
| 10 | f1oeq3 5512 |
. . . 4
| |
| 11 | 9, 10 | syl 14 |
. . 3
|
| 12 | opeq2 3820 |
. . . . 5
| |
| 13 | 12 | sneqd 3646 |
. . . 4
|
| 14 | f1oeq1 5510 |
. . . 4
| |
| 15 | 13, 14 | syl 14 |
. . 3
|
| 16 | 11, 15 | bitrd 188 |
. 2
|
| 17 | vex 2775 |
. . 3
| |
| 18 | vex 2775 |
. . 3
| |
| 19 | 17, 18 | f1osn 5562 |
. 2
|
| 20 | 8, 16, 19 | vtocl2g 2837 |
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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-14 2179 ax-ext 2187 ax-sep 4162 ax-pow 4218 ax-pr 4253 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-eu 2057 df-mo 2058 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rex 2490 df-v 2774 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-br 4045 df-opab 4106 df-id 4340 df-xp 4681 df-rel 4682 df-cnv 4683 df-co 4684 df-dm 4685 df-rn 4686 df-fun 5273 df-fn 5274 df-f 5275 df-f1 5276 df-fo 5277 df-f1o 5278 |
| This theorem is referenced by: f1sng 5564 f1oprg 5566 fsnunf 5784 dif1en 6976 1fv 10261 zfz1isolem1 10985 sumsnf 11720 prodsnf 11903 ennnfonelemhf1o 12784 |
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