Description: Ordered triple membership in a triple Cartesian product. (Contributed by Scott Fenton, 31-Jan-2025)
Ref | Expression | ||
---|---|---|---|
Assertion | otelxp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelxp | ||
2 | opelxp | ||
3 | 1 2 | bianbi | |
4 | df-ot | ||
5 | 4 | eleq1i | |
6 | df-3an | ||
7 | 3 5 6 | 3bitr4i |