Theorem brin 5167

Description: The intersection of two relations. (Contributed by FL, 7-Oct-2008.)

Assertion

Ref	Expression
brin	⊢ (𝐴(𝑅 ∩ 𝑆)𝐵 ↔ (𝐴𝑅𝐵 ∧ 𝐴𝑆𝐵))

Proof of Theorem brin

Step	Hyp	Ref	Expression
1		elin 3929	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝑅 ∩ 𝑆) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝑅 ∧ ⟨𝐴, 𝐵⟩ ∈ 𝑆))
2		df-br 5114	. 2 ⊢ (𝐴(𝑅 ∩ 𝑆)𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝑅 ∩ 𝑆))
3		df-br 5114	. . 3 ⊢ (𝐴𝑅𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ 𝑅)
4		df-br 5114	. . 3 ⊢ (𝐴𝑆𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ 𝑆)
5	3, 4	anbi12i 639	. 2 ⊢ ((𝐴𝑅𝐵 ∧ 𝐴𝑆𝐵) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝑅 ∧ ⟨𝐴, 𝐵⟩ ∈ 𝑆))
6	1, 2, 5	3bitr4i 306	1 ⊢ (𝐴(𝑅 ∩ 𝑆)𝐵 ↔ (𝐴𝑅𝐵 ∧ 𝐴𝑆𝐵))

Syntax hints:   ↔ wb 209   ∧ wa 400   ∈ wcel 2149   ∩ cin 3912  ⟨cop 4600   class class class wbr 5113

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-ext 2741

This theorem depends on definitions:  df-bi 210  df-an 401  df-tru 1570  df-ex 1807  df-sb 2098  df-clab 2748  df-cleq 2761  df-clel 2844  df-v 3465  df-in 3920  df-br 5114

This theorem is referenced by:  brinxp2  5740  trin2  6124  poirr2  6125  dfpo2  6298  predtrss  6324  tpostpos  8241  brinxper  8723  erinxp  8788  sbthcl  9086  infxpenlem  9996  fpwwe2lem11  10625  fpwwe2  10627  isinv  17816  isffth2  17974  ffthf1o  17977  ffthoppc  17982  ffthres2c  17998  isunit  20454  opsrtoslem2  22175  zsoring  28567  posrasymb  33227  trleile  33231  satefvfmla1  35815  brtxp  36268  idsset  36278  dfon3  36280  elfix  36291  dffix2  36293  brcap  36328  funpartlem  36332  trer  36715  fneval  36751  brcnvin  38916  brxrn  38921  brin2  38976  br1cossinres  39075  grumnud  44887