| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Composition of a mapping and restricted identity. |
| Ref | Expression |
|---|---|
| fcoi1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ffn 3623 |
. 2
| |
| 2 | fnop 3587 |
. . . . . . 7
| |
| 3 | 2 | ex 373 |
. . . . . 6
|
| 4 | 3 | pm4.71rd 638 |
. . . . 5
|
| 5 | visset 1810 |
. . . . . . 7
| |
| 6 | visset 1810 |
. . . . . . 7
| |
| 7 | opelcog 3286 |
. . . . . . 7
| |
| 8 | 5, 6, 7 | mp2an 696 |
. . . . . 6
|
| 9 | visset 1810 |
. . . . . . . . . . 11
| |
| 10 | 9 | opelres 3368 |
. . . . . . . . . 10
|
| 11 | 9 | ideq 3273 |
. . . . . . . . . . . 12
|
| 12 | df-br 2616 |
. . . . . . . . . . . 12
| |
| 13 | eqcom 1475 |
. . . . . . . . . . . 12
| |
| 14 | 11, 12, 13 | 3bitr3 181 |
. . . . . . . . . . 11
|
| 15 | 14 | anbi1i 481 |
. . . . . . . . . 10
|
| 16 | 10, 15 | bitr 173 |
. . . . . . . . 9
|
| 17 | 16 | anbi1i 481 |
. . . . . . . 8
|
| 18 | anass 439 |
. . . . . . . 8
| |
| 19 | 17, 18 | bitr 173 |
. . . . . . 7
|
| 20 | 19 | exbii 1050 |
. . . . . 6
|
| 21 | opeq1 2484 |
. . . . . . . . 9
| |
| 22 | 21 | eleq1d 1538 |
. . . . . . . 8
|
| 23 | 22 | anbi2d 615 |
. . . . . . 7
|
| 24 | 5, 23 | ceqsexv 1832 |
. . . . . 6
|
| 25 | 8, 20, 24 | 3bitr 177 |
. . . . 5
|
| 26 | 4, 25 | syl6rbbr 538 |
. . . 4
|
| 27 | 26 | 19.21aivv 1286 |
. . 3
|
| 28 | fnrel 3582 |
. . . 4
| |
| 29 | relco 3480 |
. . . . 5
| |
| 30 | eqrel 3246 |
. . . . 5
| |
| 31 | 29, 30 | mpan 694 |
. . . 4
|
| 32 | 28, 31 | syl 10 |
. . 3
|
| 33 | 27, 32 | mpbird 196 |
. 2
|
| 34 | 1, 33 | syl 10 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: mapenlem1 4478 mapenlem2 4479 hoico1t 9639 hmeogrp 10484 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-pow 2738 ax-pr 2775 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-br 2616 df-opab 2663 df-id 2831 df-xp 3180 df-rel 3181 df-co 3183 df-dm 3184 df-res 3186 df-fun 3188 df-fn 3189 df-f 3190 |