Metamath Proof Explorer


Theorem rnin

Description: The range of an intersection belongs the intersection of ranges. Theorem 9 of Suppes p. 60. (Contributed by NM, 15-Sep-2004) Avoid ax-pr and ax-sep . (Revised by Umit Teoman Dogan, 10-Jun-2026)

Ref Expression
Assertion rnin
|- ran ( A i^i B ) C_ ( ran A i^i ran B )

Proof

Step Hyp Ref Expression
1 inss1
 |-  ( A i^i B ) C_ A
2 1 rnssi
 |-  ran ( A i^i B ) C_ ran A
3 inss2
 |-  ( A i^i B ) C_ B
4 3 rnssi
 |-  ran ( A i^i B ) C_ ran B
5 2 4 ssini
 |-  ran ( A i^i B ) C_ ( ran A i^i ran B )