Description: The mapping of a projection. (Contributed by NM, 24-Apr-2006) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | pjhf | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pjhfo | |
|
2 | fof | |
|
3 | 1 2 | syl | |
4 | chss | |
|
5 | 3 4 | fssd | |