Metamath Proof Explorer
Description: Implicit substitution of a class for a setvar variable. This is a
generalization of chvar . (Contributed by NM, 30-Aug-1993)
|
|
Ref |
Expression |
|
Hypotheses |
vtoclf.1 |
|
|
|
vtoclf.2 |
|
|
|
vtoclf.3 |
|
|
|
vtoclf.4 |
|
|
Assertion |
vtoclf |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
vtoclf.1 |
|
2 |
|
vtoclf.2 |
|
3 |
|
vtoclf.3 |
|
4 |
|
vtoclf.4 |
|
5 |
2
|
isseti |
|
6 |
3
|
biimpd |
|
7 |
5 6
|
eximii |
|
8 |
1 7
|
19.36i |
|
9 |
8 4
|
mpg |
|