Theorem disjALTVidres

Description: The class of identity relations restricted is disjoint. (Contributed by Peter Mazsa, 28-Jun-2020) (Revised by Peter Mazsa, 27-Sep-2021)

	Ref	Expression
Assertion	disjALTVidres	⊢ Disj ( I ↾ 𝐴 )

Proof

Step	Hyp	Ref	Expression
1		disjALTVid	⊢ Disj I
2		disjimres	⊢ ( Disj I → Disj ( I ↾ 𝐴 ) )
3	1 2	ax-mp	⊢ Disj ( I ↾ 𝐴 )