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Related theorems Unicode version |
| Description: Subclass theorem for function predicate. |
| Ref | Expression |
|---|---|
| funss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relss 3306 |
. . . 4
| |
| 2 | funrel 3608 |
. . . 4
| |
| 3 | 1, 2 | syl5 21 |
. . 3
|
| 4 | ssel 2107 |
. . . . . . . 8
| |
| 5 | 4 | imim1d 28 |
. . . . . . 7
|
| 6 | 5 | 19.20dv 1322 |
. . . . . 6
|
| 7 | 6 | 19.22dv 1323 |
. . . . 5
|
| 8 | 7 | 19.20dv 1322 |
. . . 4
|
| 9 | dffun5 3604 |
. . . . 5
| |
| 10 | 9 | pm3.27bi 324 |
. . . 4
|
| 11 | 8, 10 | syl5 21 |
. . 3
|
| 12 | 3, 11 | jcad 602 |
. 2
|
| 13 | dffun5 3604 |
. 2
| |
| 14 | 12, 13 | syl6ibr 211 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funeq 3610 fun0 3619 funres 3626 funcnvcnv 3630 funres11 3642 fodom 4884 cmpfun 10585 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 994 ax-gen 995 ax-8 996 ax-10 998 ax-11 999 ax-12 1000 ax-13 1001 ax-14 1002 ax-17 1003 ax-4 1005 ax-5o 1007 ax-6o 1010 ax-9o 1155 ax-10o 1173 ax-16 1243 ax-11o 1251 ax-ext 1494 ax-sep 2754 ax-pow 2794 ax-pr 2832 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-ex 1013 df-sb 1205 df-eu 1415 df-mo 1416 df-clab 1500 df-cleq 1505 df-clel 1508 df-ne 1624 df-v 1850 df-dif 2093 df-un 2094 df-in 2095 df-ss 2097 df-nul 2325 df-pw 2447 df-sn 2457 df-pr 2458 df-op 2461 df-br 2670 df-opab 2718 df-id 2889 df-rel 3240 df-cnv 3241 df-co 3242 df-fun 3247 |