Description: The image of a set is a set. (Contributed by Glauco Siliprandi, 26-Jun-2021)
Ref | Expression | ||
---|---|---|---|
Hypothesis | imaexi.1 | |- A e. V |
|
Assertion | imaexi | |- ( A " B ) e. _V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imaexi.1 | |- A e. V |
|
2 | imaexg | |- ( A e. V -> ( A " B ) e. _V ) |
|
3 | 1 2 | ax-mp | |- ( A " B ) e. _V |