Theorem dfantisymrel4 39327

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 39326	. 2 ⊢ ( AntisymRel 𝑅 ↔ ( CnvRefRel (𝑅 ∩ ◡𝑅) ∧ Rel 𝑅))
2		relcnv 6090	. . . 4 ⊢ Rel ◡𝑅
3		relin2 5784	. . . 4 ⊢ (Rel ◡𝑅 → Rel (𝑅 ∩ ◡𝑅))
4	2, 3	ax-mp 5	. . 3 ⊢ Rel (𝑅 ∩ ◡𝑅)
5		dfcnvrefrel4 39075	. . 3 ⊢ ( CnvRefRel (𝑅 ∩ ◡𝑅) ↔ ((𝑅 ∩ ◡𝑅) ⊆ I ∧ Rel (𝑅 ∩ ◡𝑅)))
6	4, 5	mpbiran2 720	. 2 ⊢ ( CnvRefRel (𝑅 ∩ ◡𝑅) ↔ (𝑅 ∩ ◡𝑅) ⊆ I )
7	1, 6	bianbi 636	1 ⊢ ( AntisymRel 𝑅 ↔ ((𝑅 ∩ ◡𝑅) ⊆ I ∧ Rel 𝑅))

Syntax hints:   ↔ wb 208   ∧ wa 399   ∩ cin 3903   ⊆ wss 3904   I cid 5539  ^◡ccnv 5644  Rel wrel 5650   CnvRefRel wcnvrefrel 38655   AntisymRel wantisymrel 38685

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-ext 2733  ax-sep 5245  ax-pr 5389

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-sb 2090  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3076  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-opab 5162  df-xp 5651  df-rel 5652  df-cnv 5653  df-dm 5655  df-rn 5656  df-res 5657  df-cnvrefrel 39070  df-antisymrel 39326

This theorem is referenced by: (None)