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	$$⊢Disj\left({\mathrm{I}\upharpoonright }_A\right)$$

Proof

Step	Hyp	Ref	Expression
1		disjALTVid	$$⊢Disj\mathrm{I}$$
2		disjimres	$$⊢Disj\mathrm{I}\to Disj\left({\mathrm{I}\upharpoonright }_A\right)$$
3	1 2	ax-mp	$$⊢Disj\left({\mathrm{I}\upharpoonright }_A\right)$$