Description: Substitution doesn't affect a constant B (in which x is not free). (Contributed by NM, 10-Nov-2005)
Ref | Expression | ||
---|---|---|---|
Hypothesis | csbconstgf.1 | |
|
Assertion | csbconstgf | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbconstgf.1 | |
|
2 | csbtt | |
|
3 | 1 2 | mpan2 | |