Theorem brresOLD 5562

Description: Old proof of brres 5560. Obsolete as of 18-Feb-2022. (Contributed by NM, 12-Dec-2006.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
opelresOLD.1	⊢ 𝐵 ∈ V

Assertion

Ref	Expression
brresOLD	⊢ (𝐴(𝐶 ↾ 𝐷)𝐵 ↔ (𝐴𝐶𝐵 ∧ 𝐴 ∈ 𝐷))

Proof of Theorem brresOLD

Step	Hyp	Ref	Expression
1		opelresOLD.1	. . 3 ⊢ 𝐵 ∈ V
2	1	opelres 5559	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ↾ 𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ 𝐴 ∈ 𝐷))
3		df-br 4805	. 2 ⊢ (𝐴(𝐶 ↾ 𝐷)𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐶 ↾ 𝐷))
4		df-br 4805	. . 3 ⊢ (𝐴𝐶𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ 𝐶)
5	4	anbi1i 733	. 2 ⊢ ((𝐴𝐶𝐵 ∧ 𝐴 ∈ 𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ 𝐴 ∈ 𝐷))
6	2, 3, 5	3bitr4i 292	1 ⊢ (𝐴(𝐶 ↾ 𝐷)𝐵 ↔ (𝐴𝐶𝐵 ∧ 𝐴 ∈ 𝐷))

Syntax hints:   ↔ wb 196   ∧ wa 383   ∈ wcel 2139  Vcvv 3340  ⟨cop 4327   class class class wbr 4804   ↾ cres 5268

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pr 5055

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-sn 4322  df-pr 4324  df-op 4328  df-br 4805  df-opab 4865  df-xp 5272  df-res 5278

This theorem is referenced by: (None)