Users' Mathboxes Mathbox for Thierry Arnoux < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  mgcf2 Structured version   Visualization version   GIF version

Theorem mgcf2 31898
Description: The upper adjoint 𝐺 of a Galois connection is a function. (Contributed by Thierry Arnoux, 24-Apr-2024.)
Hypotheses
Ref Expression
mgcoval.1 𝐴 = (Baseβ€˜π‘‰)
mgcoval.2 𝐡 = (Baseβ€˜π‘Š)
mgcoval.3 ≀ = (leβ€˜π‘‰)
mgcoval.4 ≲ = (leβ€˜π‘Š)
mgcval.1 𝐻 = (𝑉MGalConnπ‘Š)
mgcval.2 (πœ‘ β†’ 𝑉 ∈ Proset )
mgcval.3 (πœ‘ β†’ π‘Š ∈ Proset )
mgccole.1 (πœ‘ β†’ 𝐹𝐻𝐺)
Assertion
Ref Expression
mgcf2 (πœ‘ β†’ 𝐺:𝐡⟢𝐴)

Proof of Theorem mgcf2
Dummy variables π‘₯ 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 mgccole.1 . . 3 (πœ‘ β†’ 𝐹𝐻𝐺)
2 mgcoval.1 . . . 4 𝐴 = (Baseβ€˜π‘‰)
3 mgcoval.2 . . . 4 𝐡 = (Baseβ€˜π‘Š)
4 mgcoval.3 . . . 4 ≀ = (leβ€˜π‘‰)
5 mgcoval.4 . . . 4 ≲ = (leβ€˜π‘Š)
6 mgcval.1 . . . 4 𝐻 = (𝑉MGalConnπ‘Š)
7 mgcval.2 . . . 4 (πœ‘ β†’ 𝑉 ∈ Proset )
8 mgcval.3 . . . 4 (πœ‘ β†’ π‘Š ∈ Proset )
92, 3, 4, 5, 6, 7, 8mgcval 31896 . . 3 (πœ‘ β†’ (𝐹𝐻𝐺 ↔ ((𝐹:𝐴⟢𝐡 ∧ 𝐺:𝐡⟢𝐴) ∧ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ 𝐡 ((πΉβ€˜π‘₯) ≲ 𝑦 ↔ π‘₯ ≀ (πΊβ€˜π‘¦)))))
101, 9mpbid 231 . 2 (πœ‘ β†’ ((𝐹:𝐴⟢𝐡 ∧ 𝐺:𝐡⟢𝐴) ∧ βˆ€π‘₯ ∈ 𝐴 βˆ€π‘¦ ∈ 𝐡 ((πΉβ€˜π‘₯) ≲ 𝑦 ↔ π‘₯ ≀ (πΊβ€˜π‘¦))))
1110simplrd 769 1 (πœ‘ β†’ 𝐺:𝐡⟢𝐴)
Colors of variables: wff setvar class
Syntax hints:   β†’ wi 4   ↔ wb 205   ∧ wa 397   = wceq 1542   ∈ wcel 2107  βˆ€wral 3061   class class class wbr 5106  βŸΆwf 6493  β€˜cfv 6497  (class class class)co 7358  Basecbs 17088  lecple 17145   Proset cproset 18187  MGalConncmgc 31888
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-sep 5257  ax-nul 5264  ax-pow 5321  ax-pr 5385  ax-un 7673
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3407  df-v 3446  df-sbc 3741  df-csb 3857  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4284  df-if 4488  df-pw 4563  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4867  df-br 5107  df-opab 5169  df-id 5532  df-xp 5640  df-rel 5641  df-cnv 5642  df-co 5643  df-dm 5644  df-rn 5645  df-iota 6449  df-fun 6499  df-fn 6500  df-f 6501  df-fv 6505  df-ov 7361  df-oprab 7362  df-mpo 7363  df-map 8770  df-mgc 31890
This theorem is referenced by:  mgcmntco  31903  mgcmnt2d  31907
  Copyright terms: Public domain W3C validator