Description: Deduction version of nfcsb . Usage of this theorem is discouraged because it depends on ax-13 . (Contributed by NM, 21-Nov-2005) (Revised by Mario Carneiro, 12-Oct-2016) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nfcsbd.1 | |
|
nfcsbd.2 | |
||
nfcsbd.3 | |
||
Assertion | nfcsbd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcsbd.1 | |
|
2 | nfcsbd.2 | |
|
3 | nfcsbd.3 | |
|
4 | df-csb | |
|
5 | nfv | |
|
6 | 3 | nfcrd | |
7 | 1 2 6 | nfsbcd | |
8 | 5 7 | nfabd | |
9 | 4 8 | nfcxfrd | |