Theorem relin1 4745

Description: The intersection with a relation is a relation. (Contributed by NM, 16-Aug-1994.)

Assertion

Ref	Expression
relin1	|- ( Rel A -> Rel ( A i^i B ) )

Proof of Theorem relin1

Step	Hyp	Ref	Expression
1		inss1 3356	. 2 |- ( A i^i B ) C_ A
2		relss 4714	. 2 |- ( ( A i^i B ) C_ A -> ( Rel A -> Rel ( A i^i B ) ) )
3	1, 2	ax-mp 5	1 |- ( Rel A -> Rel ( A i^i B ) )

Syntax hints:   -> wi 4   i^i cin 3129   C_ wss 3130   Rel wrel 4632

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159

This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2740  df-in 3136  df-ss 3143  df-rel 4634

This theorem is referenced by:  inopab  4760  isunitd  13275