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| Mirrors > Home > NFE Home > Th. List > df-ima | Unicode version | ||
| Description: Define the image of one class under another. (Contributed by SF, 5-Jan-2015.) |
| Ref | Expression |
|---|---|
| df-ima |
         
    |
,, ,,| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cA |
. . 3
 | |
| 2 | cB |
. . 3
| |
| 3 | 1, 2 | cima 4722 |
. 2
|
| 4 | vy |
. . . . . 6
 | |
| 5 | 4 | cv 1641 |
. . . . 5
|
| 6 | vx |
. . . . . 6
| |
| 7 | 6 | cv 1641 |
. . . . 5
|
| 8 | 5, 7, 1 | wbr 4639 |
. . . 4
 |
| 9 | 8, 4, 2 | wrex 2615 |
. . 3
|
| 10 | 9, 6 | cab 2339 |
. 2
|
| 11 | 3, 10 | wceq 1642 |
1
|
| Colors of variables: wff setvar class |
| This definition is referenced by: dfima2 4745 elima 4754 imaeq1 4937 imaeq2 4938 dfima4 4952 nfima 4953 imadmrn 5008 imasn 5018 dfimafn 5366 isoini 5497 clos1basesuc 5882 enpw1pw 6075 |
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