Description: Equality deduction for proper substitution into a class. (Contributed by NM, 3-Dec-2005)
Ref | Expression | ||
---|---|---|---|
Hypothesis | csbeq1d.1 | |
|
Assertion | csbeq1d | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbeq1d.1 | |
|
2 | csbeq1 | |
|
3 | 1 2 | syl | |