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Related theorems Unicode version |
| Description: Subclass theorem for function predicate. |
| Ref | Expression |
|---|---|
| funss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssrel 2479 |
. . . 4
| |
| 2 | funrel 2681 |
. . . 4
| |
| 3 | 1, 2 | syl5 22 |
. . 3
|
| 4 | ssel 1502 |
. . . . . . . 8
| |
| 5 | 4 | syl4d 28 |
. . . . . . 7
|
| 6 | 5 | 19.20dv 946 |
. . . . . 6
|
| 7 | 6 | 19.22dv 947 |
. . . . 5
|
| 8 | 7 | 19.20dv 946 |
. . . 4
|
| 9 | dffun5 2677 |
. . . . 5
| |
| 10 | 9 | pm3.27bd 263 |
. . . 4
|
| 11 | 8, 10 | syl5 22 |
. . 3
|
| 12 | 3, 11 | jcad 455 |
. 2
|
| 13 | dffun5 2677 |
. 2
| |
| 14 | 12, 13 | syl6ibr 186 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funeq 2683 fun0 2691 funres 2697 funcnvcnv 2701 funres11 2709 fodom 3613 |
| 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-eu 1009 df-mo 1010 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-rel 2425 df-cnv 2426 df-co 2427 df-fun 2432 |