Description: The characteristic property of monuples. Note that this holds without sethood hypotheses. (Contributed by BJ, 6-Apr-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | bj-1uplth |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-pr1eq | ||
2 | bj-pr11val | ||
3 | bj-pr11val | ||
4 | 1 2 3 | 3eqtr3g | |
5 | bj-1upleq | ||
6 | 4 5 | impbii |