Theorem brsdom 8915

Description: Strict dominance relation, meaning "𝐵 is strictly greater in size than 𝐴". Definition of [Mendelson] p. 255. (Contributed by NM, 25-Jun-1998.)

Assertion

Ref	Expression
brsdom	⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵))

Proof of Theorem brsdom

Step	Hyp	Ref	Expression
1		df-sdom 8890	. . 3 ⊢ ≺ = ( ≼ ∖ ≈ )
2	1	eleq2i 2829	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ ≺ ↔ ⟨𝐴, 𝐵⟩ ∈ ( ≼ ∖ ≈ ))
3		df-br 5087	. 2 ⊢ (𝐴 ≺ 𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ ≺ )
4		df-br 5087	. . . 4 ⊢ (𝐴 ≼ 𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ ≼ )
5		df-br 5087	. . . . 5 ⊢ (𝐴 ≈ 𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ ≈ )
6	5	notbii 320	. . . 4 ⊢ (¬ 𝐴 ≈ 𝐵 ↔ ¬ ⟨𝐴, 𝐵⟩ ∈ ≈ )
7	4, 6	anbi12i 629	. . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵) ↔ (⟨𝐴, 𝐵⟩ ∈ ≼ ∧ ¬ ⟨𝐴, 𝐵⟩ ∈ ≈ ))
8		eldif 3900	. . 3 ⊢ (⟨𝐴, 𝐵⟩ ∈ ( ≼ ∖ ≈ ) ↔ (⟨𝐴, 𝐵⟩ ∈ ≼ ∧ ¬ ⟨𝐴, 𝐵⟩ ∈ ≈ ))
9	7, 8	bitr4i 278	. 2 ⊢ ((𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵) ↔ ⟨𝐴, 𝐵⟩ ∈ ( ≼ ∖ ≈ ))
10	2, 3, 9	3bitr4i 303	1 ⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵))

Syntax hints:  ¬ wn 3   ↔ wb 206   ∧ wa 395   ∈ wcel 2114   ∖ cdif 3887  ⟨cop 4574   class class class wbr 5086   ≈ cen 8884   ≼ cdom 8885   ≺ csdm 8886

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 2709

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-v 3432  df-dif 3893  df-br 5087  df-sdom 8890

This theorem is referenced by:  sdomdom  8921  sdomnen  8922  0sdomg  9038  sdom0  9041  sdomdomtr  9042  domsdomtr  9044  domtriord  9055  canth2  9062  sdomdomtrfi  9129  domsdomtrfi  9130  php2  9136  nnsdomo  9147  1sdom2  9152  sdom1  9154  1sdom2dom  9158  nnsdomg  9203  card2inf  9464  cardsdomelir  9891  cardsdom2  9906  fidomtri2  9912  cardmin2  9917  alephordi  9990  alephord  9991  isfin4p1  10231  isfin5-2  10307  canthnum  10566  canthwe  10568  canthp1  10571  gchdjuidm  10585  gchxpidm  10586  gchhar  10596  axgroth6  10745  hashsdom  14337  ruc  16204  iscard5  43984