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| Description: Membership relation for the values of a function whose image is a subclass. (Contributed by Raph Levien, 20-Nov-2006.) |
| Ref | Expression |
|---|---|
| funimass4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssel 2059 |
. . . . . . . . . . . 12
| |
| 2 | visset 1809 |
. . . . . . . . . . . . . 14
| |
| 3 | 2 | funbrfvb 3746 |
. . . . . . . . . . . . 13
|
| 4 | 3 | ex 373 |
. . . . . . . . . . . 12
|
| 5 | 1, 4 | syl9 57 |
. . . . . . . . . . 11
|
| 6 | 5 | imp31 362 |
. . . . . . . . . 10
|
| 7 | eqcom 1474 |
. . . . . . . . . 10
| |
| 8 | 6, 7 | syl5bb 531 |
. . . . . . . . 9
|
| 9 | 8 | rexbidva 1657 |
. . . . . . . 8
|
| 10 | 2 | elima 3400 |
. . . . . . . 8
|
| 11 | 9, 10 | syl6rbbr 538 |
. . . . . . 7
|
| 12 | 11 | imbi1d 612 |
. . . . . 6
|
| 13 | r19.23v 1738 |
. . . . . 6
| |
| 14 | 12, 13 | syl6bbr 537 |
. . . . 5
|
| 15 | 14 | albidv 1276 |
. . . 4
|
| 16 | ralcom4 1819 |
. . . . 5
| |
| 17 | fvex 3723 |
. . . . . . 7
| |
| 18 | eleq1 1531 |
. . . . . . 7
| |
| 19 | 17, 18 | ceqsalv 1823 |
. . . . . 6
|
| 20 | 19 | ralbii 1664 |
. . . . 5
|
| 21 | 16, 20 | bitr3 175 |
. . . 4
|
| 22 | 15, 21 | syl6bb 535 |
. . 3
|
| 23 | dfss2 2054 |
. . 3
| |
| 24 | 22, 23 | syl5bb 531 |
. 2
|
| 25 | 24 | ancoms 436 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funimass3 3797 funimass5 3798 funconstss 3799 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-ral 1646 df-rex 1647 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-opab 2662 df-id 2830 df-xp 3179 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-fv 3193 |