Theorem infexd 8430

Description: An infimum is a set. (Contributed by AV, 2-Sep-2020.)

Hypothesis

Ref	Expression
infexd.1	⊢ (𝜑 → 𝑅 Or 𝐴)

Assertion

Ref	Expression
infexd	⊢ (𝜑 → inf(𝐵, 𝐴, 𝑅) ∈ V)

Proof of Theorem infexd

Step	Hyp	Ref	Expression
1		df-inf 8390	. 2 ⊢ inf(𝐵, 𝐴, 𝑅) = sup(𝐵, 𝐴, ◡𝑅)
2		infexd.1	. . . 4 ⊢ (𝜑 → 𝑅 Or 𝐴)
3		cnvso 5712	. . . 4 ⊢ (𝑅 Or 𝐴 ↔ ◡𝑅 Or 𝐴)
4	2, 3	sylib 208	. . 3 ⊢ (𝜑 → ◡𝑅 Or 𝐴)
5	4	supexd 8400	. 2 ⊢ (𝜑 → sup(𝐵, 𝐴, ◡𝑅) ∈ V)
6	1, 5	syl5eqel 2734	1 ⊢ (𝜑 → inf(𝐵, 𝐴, 𝑅) ∈ V)

Syntax hints:   → wi 4   ∈ wcel 2030  Vcvv 3231   Or wor 5063  ^◡ccnv 5142  supcsup 8387  infcinf 8388

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pr 4936  ax-un 6991

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-rmo 2949  df-rab 2950  df-v 3233  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-br 4686  df-opab 4746  df-po 5064  df-so 5065  df-cnv 5151  df-sup 8389  df-inf 8390

This theorem is referenced by:  infex  8440  omsfval  30484  wsucex  31896  prmdvdsfmtnof1  41824