Theorem relin1 5760

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

Assertion

Ref	Expression
relin1	⊢ (Rel 𝐴 → Rel (𝐴 ∩ 𝐵))

Proof of Theorem relin1

Step	Hyp	Ref	Expression
1		inss1 4188	. 2 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐴
2		relss 5730	. 2 ⊢ ((𝐴 ∩ 𝐵) ⊆ 𝐴 → (Rel 𝐴 → Rel (𝐴 ∩ 𝐵)))
3	1, 2	ax-mp 5	1 ⊢ (Rel 𝐴 → Rel (𝐴 ∩ 𝐵))

Syntax hints:   → wi 4   ∩ cin 3899   ⊆ wss 3900  Rel wrel 5628

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2707

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2714  df-cleq 2727  df-clel 2810  df-v 3441  df-in 3907  df-ss 3917  df-rel 5630

This theorem is referenced by:  inopab  5777  idsset  36061  dihmeetlem1N  41585  dihglblem5apreN  41586  dihmeetlem4preN  41601  dihmeetlem13N  41614  uptrlem2  49493  uptra  49497  uptrar  49498  uptr2a  49504  thincciso2  49737