Theorem mgcmnt2 33254

Description: The upper adjoint 𝐺 of a Galois connection is monotonically increasing. (Contributed by Thierry Arnoux, 26-Apr-2024.)

Hypotheses

Ref	Expression
mgcoval.1	⊢ 𝐴 = (Base‘𝑉)
mgcoval.2	⊢ 𝐵 = (Base‘𝑊)
mgcoval.3	⊢ ≤ = (le‘𝑉)
mgcoval.4	⊢ ≲ = (le‘𝑊)
mgcval.1	⊢ 𝐻 = (𝑉MGalConn𝑊)
mgcval.2	⊢ (𝜑 → 𝑉 ∈ Proset )
mgcval.3	⊢ (𝜑 → 𝑊 ∈ Proset )
mgccole.1	⊢ (𝜑 → 𝐹𝐻𝐺)
mgcmnt2.1	⊢ (𝜑 → 𝑋 ∈ 𝐵)
mgcmnt2.2	⊢ (𝜑 → 𝑌 ∈ 𝐵)
mgcmnt2.3	⊢ (𝜑 → 𝑋 ≲ 𝑌)

Assertion

Ref	Expression
mgcmnt2	⊢ (𝜑 → (𝐺‘𝑋) ≤ (𝐺‘𝑌))

Proof of Theorem mgcmnt2

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mgcval.3	. . 3 ⊢ (𝜑 → 𝑊 ∈ Proset )
2		mgccole.1	. . . . . 6 ⊢ (𝜑 → 𝐹𝐻𝐺)
3		mgcoval.1	. . . . . . 7 ⊢ 𝐴 = (Base‘𝑉)
4		mgcoval.2	. . . . . . 7 ⊢ 𝐵 = (Base‘𝑊)
5		mgcoval.3	. . . . . . 7 ⊢ ≤ = (le‘𝑉)
6		mgcoval.4	. . . . . . 7 ⊢ ≲ = (le‘𝑊)
7		mgcval.1	. . . . . . 7 ⊢ 𝐻 = (𝑉MGalConn𝑊)
8		mgcval.2	. . . . . . 7 ⊢ (𝜑 → 𝑉 ∈ Proset )
9	3, 4, 5, 6, 7, 8, 1	mgcval 33248	. . . . . 6 ⊢ (𝜑 → (𝐹𝐻𝐺 ↔ ((𝐹:𝐴⟶𝐵 ∧ 𝐺:𝐵⟶𝐴) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ((𝐹‘𝑥) ≲ 𝑦 ↔ 𝑥 ≤ (𝐺‘𝑦)))))
10	2, 9	mpbid 235	. . . . 5 ⊢ (𝜑 → ((𝐹:𝐴⟶𝐵 ∧ 𝐺:𝐵⟶𝐴) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ((𝐹‘𝑥) ≲ 𝑦 ↔ 𝑥 ≤ (𝐺‘𝑦))))
11	10	simplld 779	. . . 4 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
12	10	simplrd 781	. . . . 5 ⊢ (𝜑 → 𝐺:𝐵⟶𝐴)
13		mgcmnt2.1	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
14	12, 13	ffvelcdmd 7081	. . . 4 ⊢ (𝜑 → (𝐺‘𝑋) ∈ 𝐴)
15	11, 14	ffvelcdmd 7081	. . 3 ⊢ (𝜑 → (𝐹‘(𝐺‘𝑋)) ∈ 𝐵)
16		mgcmnt2.2	. . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
17	3, 4, 5, 6, 7, 8, 1, 2, 13	mgccole2 33252	. . 3 ⊢ (𝜑 → (𝐹‘(𝐺‘𝑋)) ≲ 𝑋)
18		mgcmnt2.3	. . 3 ⊢ (𝜑 → 𝑋 ≲ 𝑌)
19	4, 6	prstr 18355	. . 3 ⊢ ((𝑊 ∈ Proset ∧ ((𝐹‘(𝐺‘𝑋)) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ ((𝐹‘(𝐺‘𝑋)) ≲ 𝑋 ∧ 𝑋 ≲ 𝑌)) → (𝐹‘(𝐺‘𝑋)) ≲ 𝑌)
20	1, 15, 13, 16, 17, 18, 19	syl132anc 1413	. 2 ⊢ (𝜑 → (𝐹‘(𝐺‘𝑋)) ≲ 𝑌)
21		breq2 5117	. . . 4 ⊢ (𝑦 = 𝑌 → ((𝐹‘(𝐺‘𝑋)) ≲ 𝑦 ↔ (𝐹‘(𝐺‘𝑋)) ≲ 𝑌))
22		fveq2 6882	. . . . 5 ⊢ (𝑦 = 𝑌 → (𝐺‘𝑦) = (𝐺‘𝑌))
23	22	breq2d 5125	. . . 4 ⊢ (𝑦 = 𝑌 → ((𝐺‘𝑋) ≤ (𝐺‘𝑦) ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑌)))
24	21, 23	bibi12d 348	. . 3 ⊢ (𝑦 = 𝑌 → (((𝐹‘(𝐺‘𝑋)) ≲ 𝑦 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑦)) ↔ ((𝐹‘(𝐺‘𝑋)) ≲ 𝑌 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑌))))
25		fveq2 6882	. . . . . . 7 ⊢ (𝑥 = (𝐺‘𝑋) → (𝐹‘𝑥) = (𝐹‘(𝐺‘𝑋)))
26	25	breq1d 5123	. . . . . 6 ⊢ (𝑥 = (𝐺‘𝑋) → ((𝐹‘𝑥) ≲ 𝑦 ↔ (𝐹‘(𝐺‘𝑋)) ≲ 𝑦))
27		breq1 5116	. . . . . 6 ⊢ (𝑥 = (𝐺‘𝑋) → (𝑥 ≤ (𝐺‘𝑦) ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑦)))
28	26, 27	bibi12d 348	. . . . 5 ⊢ (𝑥 = (𝐺‘𝑋) → (((𝐹‘𝑥) ≲ 𝑦 ↔ 𝑥 ≤ (𝐺‘𝑦)) ↔ ((𝐹‘(𝐺‘𝑋)) ≲ 𝑦 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑦))))
29	28	ralbidv 3194	. . . 4 ⊢ (𝑥 = (𝐺‘𝑋) → (∀𝑦 ∈ 𝐵 ((𝐹‘𝑥) ≲ 𝑦 ↔ 𝑥 ≤ (𝐺‘𝑦)) ↔ ∀𝑦 ∈ 𝐵 ((𝐹‘(𝐺‘𝑋)) ≲ 𝑦 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑦))))
30	10	simprd 500	. . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ((𝐹‘𝑥) ≲ 𝑦 ↔ 𝑥 ≤ (𝐺‘𝑦)))
31	29, 30, 14	rspcdva 3591	. . 3 ⊢ (𝜑 → ∀𝑦 ∈ 𝐵 ((𝐹‘(𝐺‘𝑋)) ≲ 𝑦 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑦)))
32	24, 31, 16	rspcdva 3591	. 2 ⊢ (𝜑 → ((𝐹‘(𝐺‘𝑋)) ≲ 𝑌 ↔ (𝐺‘𝑋) ≤ (𝐺‘𝑌)))
33	20, 32	mpbid 235	1 ⊢ (𝜑 → (𝐺‘𝑋) ≤ (𝐺‘𝑌))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 400   = wceq 1567   ∈ wcel 2149  ∀wral 3085   class class class wbr 5113  ⟶wf 6533  ‘cfv 6537  (class class class)co 7411  Basecbs 17269  lecple 17317   Proset cproset 18348  MGalConncmgc 33240

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5261  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-br 5114  df-opab 5178  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545  df-ov 7414  df-oprab 7415  df-mpo 7416  df-map 8826  df-proset 18350  df-mgc 33242

This theorem is referenced by:  dfmgc2  33257  mgcf1olem2  33263