Description: An equality deduction for the maps-to notation. (Contributed by NM, 12-Sep-2011)
Ref | Expression | ||
---|---|---|---|
Hypotheses | mpoeq123dv.1 | |
|
mpoeq123dv.2 | |
||
mpoeq123dv.3 | |
||
Assertion | mpoeq123dv | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpoeq123dv.1 | |
|
2 | mpoeq123dv.2 | |
|
3 | mpoeq123dv.3 | |
|
4 | 2 | adantr | |
5 | 3 | adantr | |
6 | 1 4 5 | mpoeq123dva | |