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| Mirrors > Home > ILE Home > Th. List > fsnunf | Unicode version | ||
| Description: Adjoining a point to a function gives a function. (Contributed by Stefan O'Rear, 28-Feb-2015.) |
| Ref | Expression |
|---|---|
| fsnunf |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simp1 1028 |
. . 3
| |
| 2 | simp2l 1054 |
. . . . 5
| |
| 3 | simp3 1030 |
. . . . 5
| |
| 4 | f1osng 5680 |
. . . . 5
| |
| 5 | 2, 3, 4 | syl2anc 415 |
. . . 4
|
| 6 | f1of 5637 |
. . . 4
| |
| 7 | 5, 6 | syl 14 |
. . 3
|
| 8 | simp2r 1055 |
. . . 4
| |
| 9 | disjsn 3770 |
. . . 4
| |
| 10 | 8, 9 | sylibr 134 |
. . 3
|
| 11 | fun 5559 |
. . 3
| |
| 12 | 1, 7, 10, 11 | syl21anc 1277 |
. 2
|
| 13 | snssi 3857 |
. . . . 5
| |
| 14 | 13 | 3ad2ant3 1051 |
. . . 4
|
| 15 | ssequn2 3402 |
. . . 4
| |
| 16 | 14, 15 | sylib 122 |
. . 3
|
| 17 | feq3 5516 |
. . 3
| |
| 18 | 16, 17 | syl 14 |
. 2
|
| 19 | 12, 18 | mpbid 147 |
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 4247 ax-pow 4309 ax-pr 4344 |
| This theorem depends on definitions: df-bi 117 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-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 3690 df-sn 3714 df-pr 3715 df-op 3717 df-br 4129 df-opab 4191 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 |
| This theorem is referenced by: tfrcllemsucfn 6617 ennnfonelemg 13275 |
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