Theorem cmcm2ii

Description: Commutation with orthocomplement. Theorem 2.3(i) of Beran p. 39. (Contributed by NM, 7-Aug-2004) (New usage is discouraged.)

	Ref	Expression
Hypotheses	pjoml2.1	⊢ 𝐴 ∈ Cℋ
	pjoml2.2	⊢ 𝐵 ∈ Cℋ
	cmcmi.1	⊢ 𝐴 𝐶ℋ 𝐵
Assertion	cmcm2ii	⊢ 𝐴 𝐶ℋ ( ⊥ ‘ 𝐵 )

Proof

Step	Hyp	Ref	Expression
1		pjoml2.1	⊢ 𝐴 ∈ Cℋ
2		pjoml2.2	⊢ 𝐵 ∈ Cℋ
3		cmcmi.1	⊢ 𝐴 𝐶ℋ 𝐵
4	1 2	cmcm2i	⊢ ( 𝐴 𝐶ℋ 𝐵 ↔ 𝐴 𝐶ℋ ( ⊥ ‘ 𝐵 ) )
5	3 4	mpbi	⊢ 𝐴 𝐶ℋ ( ⊥ ‘ 𝐵 )