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Related theorems Unicode version |
| Description: Composition of a mapping and restricted identity. |
| Ref | Expression |
|---|---|
| fcoi1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ffn 2752 |
. 2
| |
| 2 | visset 1350 |
. . . . . . . 8
| |
| 3 | visset 1350 |
. . . . . . . 8
| |
| 4 | 2, 3 | fnop 2727 |
. . . . . . 7
|
| 5 | 4 | exp 291 |
. . . . . 6
|
| 6 | pm4.71r 482 |
. . . . . 6
| |
| 7 | 5, 6 | sylib 173 |
. . . . 5
|
| 8 | opelcog 2511 |
. . . . . . 7
| |
| 9 | 2, 3, 8 | mp2an 520 |
. . . . . 6
|
| 10 | visset 1350 |
. . . . . . . . . . 11
| |
| 11 | 10 | opelres 2579 |
. . . . . . . . . 10
|
| 12 | 2, 10 | ideq 2127 |
. . . . . . . . . . . 12
|
| 13 | df-br 2063 |
. . . . . . . . . . . 12
| |
| 14 | cleqcom 1103 |
. . . . . . . . . . . 12
| |
| 15 | 12, 13, 14 | 3bitr3 156 |
. . . . . . . . . . 11
|
| 16 | 15 | anbi1i 368 |
. . . . . . . . . 10
|
| 17 | 11, 16 | bitr 151 |
. . . . . . . . 9
|
| 18 | 17 | anbi1i 368 |
. . . . . . . 8
|
| 19 | anass 336 |
. . . . . . . 8
| |
| 20 | 18, 19 | bitr 151 |
. . . . . . 7
|
| 21 | 20 | biex 733 |
. . . . . 6
|
| 22 | opeq1 1876 |
. . . . . . . . 9
| |
| 23 | 22 | eleq1d 1155 |
. . . . . . . 8
|
| 24 | 23 | anbi2d 468 |
. . . . . . 7
|
| 25 | 2, 24 | ceqsexv 1371 |
. . . . . 6
|
| 26 | 9, 21, 25 | 3bitr 155 |
. . . . 5
|
| 27 | 7, 26 | syl6rbbr 417 |
. . . 4
|
| 28 | 27 | 19.21aivv 944 |
. . 3
|
| 29 | fnrel 2722 |
. . . 4
| |
| 30 | relco 2658 |
. . . . 5
| |
| 31 | cleqrel 2483 |
. . . . 5
| |
| 32 | 30, 31 | mpan 518 |
. . . 4
|
| 33 | 29, 32 | syl 12 |
. . 3
|
| 34 | 28, 33 | mpbird 171 |
. 2
|
| 35 | 1, 34 | syl 12 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: mapenlem1 3384 mapenlem2 3385 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-co 2427 df-dm 2428 df-res 2430 df-fun 2432 df-fn 2433 df-f 2434 |