Metamath Proof Explorer
Description: Implicit substitution of a class for a setvar variable. (Contributed by NM, 18-Aug-1993)
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Ref |
Expression |
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Hypotheses |
vtoclef.1 |
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|
vtoclef.2 |
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vtoclef.3 |
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|
Assertion |
vtoclef |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
vtoclef.1 |
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2 |
|
vtoclef.2 |
|
3 |
|
vtoclef.3 |
|
4 |
2
|
isseti |
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5 |
1 3
|
exlimi |
|
6 |
4 5
|
ax-mp |
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