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Mirrors > Home > NFE Home > Th. List > df-image | Unicode version |
Description: Define the image function of a class. (Contributed by SF, 9-Feb-2015.) (Revised by Scott Fenton, 19-Apr-2021.) |
Ref | Expression |
---|---|
df-image | Image ∼ Ins2 S Ins3 S SI 1c |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cA | . . 3 | |
2 | 1 | cimage 5753 | . 2 Image |
3 | csset 4719 | . . . . . 6 S | |
4 | 3 | cins2 5749 | . . . . 5 Ins2 S |
5 | 1 | csi 4720 | . . . . . . . 8 SI |
6 | 5 | ccnv 4771 | . . . . . . 7 SI |
7 | 3, 6 | ccom 4721 | . . . . . 6 S SI |
8 | 7 | cins3 5751 | . . . . 5 Ins3 S SI |
9 | 4, 8 | csymdif 3209 | . . . 4 Ins2 S Ins3 S SI |
10 | c1c 4134 | . . . 4 1c | |
11 | 9, 10 | cima 4722 | . . 3 Ins2 S Ins3 S SI 1c |
12 | 11 | ccompl 3205 | . 2 ∼ Ins2 S Ins3 S SI 1c |
13 | 2, 12 | wceq 1642 | 1 Image ∼ Ins2 S Ins3 S SI 1c |
Colors of variables: wff setvar class |
This definition is referenced by: brimage 5793 imageexg 5800 |
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