Theorem dfantisymrel4 39109

Description: Alternate definition of the antisymmetric relation predicate. (Contributed by Peter Mazsa, 24-Jun-2024.)

Assertion

Ref	Expression
dfantisymrel4	⊢ ( AntisymRel 𝑅 ↔ ((𝑅 ∩ ◡𝑅) ⊆ I ∧ Rel 𝑅))

Proof of Theorem dfantisymrel4

Step	Hyp	Ref	Expression
1		df-antisymrel 39108	. 2 ⊢ ( AntisymRel 𝑅 ↔ ( CnvRefRel (𝑅 ∩ ◡𝑅) ∧ Rel 𝑅))
2		relcnv 6071	. . . 4 ⊢ Rel ◡𝑅
3		relin2 5770	. . . 4 ⊢ (Rel ◡𝑅 → Rel (𝑅 ∩ ◡𝑅))
4	2, 3	ax-mp 5	. . 3 ⊢ Rel (𝑅 ∩ ◡𝑅)
5		dfcnvrefrel4 38857	. . 3 ⊢ ( CnvRefRel (𝑅 ∩ ◡𝑅) ↔ ((𝑅 ∩ ◡𝑅) ⊆ I ∧ Rel (𝑅 ∩ ◡𝑅)))
6	4, 5	mpbiran2 711	. 2 ⊢ ( CnvRefRel (𝑅 ∩ ◡𝑅) ↔ (𝑅 ∩ ◡𝑅) ⊆ I )
7	1, 6	bianbi 628	1 ⊢ ( AntisymRel 𝑅 ↔ ((𝑅 ∩ ◡𝑅) ⊆ I ∧ Rel 𝑅))

Syntax hints:   ↔ wb 206   ∧ wa 395   ∩ cin 3902   ⊆ wss 3903   I cid 5526  ^◡ccnv 5631  Rel wrel 5637   CnvRefRel wcnvrefrel 38437   AntisymRel wantisymrel 38467

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  ax-sep 5243  ax-pr 5379

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-xp 5638  df-rel 5639  df-cnv 5640  df-dm 5642  df-rn 5643  df-res 5644  df-cnvrefrel 38852  df-antisymrel 39108

This theorem is referenced by: (None)