Metamath Proof Explorer


Theorem chj1i

Description: Join with Hilbert lattice unit. (Contributed by NM, 6-Aug-2004) (New usage is discouraged.)

Ref Expression
Hypothesis ch0le.1 A C
Assertion chj1i A =

Proof

Step Hyp Ref Expression
1 ch0le.1 A C
2 helch C
3 1 2 chjcli A C
4 3 chssii A
5 2 1 chub2i A
6 4 5 eqssi A =