Description: An unordered triple containing a set is not empty. (Contributed by NM, 10-Apr-1994)
Ref | Expression | ||
---|---|---|---|
Hypothesis | tpnz.1 | |
|
Assertion | tpnz | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tpnz.1 | |
|
2 | 1 | tpid1 | |
3 | 2 | ne0ii | |