Description: Implicit substitution of classes for setvar variables. (Contributed by NM, 26-Jul-1995) (Proof shortened by Andrew Salmon, 8-Jun-2011)
Ref | Expression | ||
---|---|---|---|
Hypotheses | vtocl2.1 | |
|
vtocl2.2 | |
||
vtocl2.3 | |
||
vtocl2.4 | |
||
Assertion | vtocl2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vtocl2.1 | |
|
2 | vtocl2.2 | |
|
3 | vtocl2.3 | |
|
4 | vtocl2.4 | |
|
5 | 4 | a1i | |
6 | 3 | pm5.74da | |
7 | 1 6 5 | vtocl | |
8 | 5 7 | 2thd | |
9 | 2 8 4 | vtocl | |