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| Description: The value of a class outside its domain is the empty set. |
| Ref | Expression |
|---|---|
| ndmfv |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1 1531 |
. . . . . 6
| |
| 2 | breq1 2617 |
. . . . . . 7
| |
| 3 | 2 | exbidv 1277 |
. . . . . 6
|
| 4 | visset 1809 |
. . . . . . 7
| |
| 5 | 4 | eldm 3302 |
. . . . . 6
|
| 6 | 1, 3, 5 | vtoclbg 1844 |
. . . . 5
|
| 7 | euex 1392 |
. . . . 5
| |
| 8 | 6, 7 | syl5bir 210 |
. . . 4
|
| 9 | 8 | con3d 95 |
. . 3
|
| 10 | tz6.12-2 3730 |
. . 3
| |
| 11 | 9, 10 | syl6 22 |
. 2
|
| 12 | fvprc 3712 |
. . 3
| |
| 13 | 12 | a1d 12 |
. 2
|
| 14 | 11, 13 | pm2.61i 126 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ndmfvrcl 3737 elfvdm 3738 nfvres 3739 funfv 3761 fvco 3765 fvopab4ndm 3775 funiunfv 3857 rdgsucopabn 3938 oprprc1 3975 oprssdm 4033 ndmoprg 4034 ndmoprgOLD 4035 1st2val 4085 2nd2val 4086 r1tr 4634 alephon 4845 alephcard 4847 alephnbtwn 4848 alephgeom 4862 cfub 4888 cardcf 4891 cflecard 4892 cfle 4893 uzssz 6370 alephadd 7532 issubg 8068 0vfval 8177 vsfval 8206 dmadjrnb 9770 hmdmadjt 9803 |
| 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 |
| 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-xp 3179 df-cnv 3181 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fv 3193 |