Description: Existence of a restriction of the function operation map. (Contributed by NM, 20-Oct-2014)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ofmresex.a | |
|
ofmresex.b | |
||
Assertion | ofmresex | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ofmresex.a | |
|
2 | ofmresex.b | |
|
3 | 1 2 | xpexd | |
4 | ofexg | |
|
5 | 3 4 | syl | |