Description: A rearrangement of Hilbert lattice join. (Contributed by NM, 29-Apr-2006) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | chj12.1 | ||
chj12.2 | |||
chj12.3 | |||
Assertion | chj12i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | chj12.1 | ||
2 | chj12.2 | ||
3 | chj12.3 | ||
4 | 1 2 | chjcomi | |
5 | 4 | oveq1i | |
6 | 1 2 3 | chjassi | |
7 | 2 1 3 | chjassi | |
8 | 5 6 7 | 3eqtr3i |