Step |
Hyp |
Ref |
Expression |
1 |
|
mgcoval.1 |
⊢ 𝐴 = ( Base ‘ 𝑉 ) |
2 |
|
mgcoval.2 |
⊢ 𝐵 = ( Base ‘ 𝑊 ) |
3 |
|
mgcoval.3 |
⊢ ≤ = ( le ‘ 𝑉 ) |
4 |
|
mgcoval.4 |
⊢ ≲ = ( le ‘ 𝑊 ) |
5 |
|
mgcval.1 |
⊢ 𝐻 = ( 𝑉 MGalConn 𝑊 ) |
6 |
|
mgcval.2 |
⊢ ( 𝜑 → 𝑉 ∈ Proset ) |
7 |
|
mgcval.3 |
⊢ ( 𝜑 → 𝑊 ∈ Proset ) |
8 |
|
mgccole.1 |
⊢ ( 𝜑 → 𝐹 𝐻 𝐺 ) |
9 |
|
mgccole1.2 |
⊢ ( 𝜑 → 𝑋 ∈ 𝐴 ) |
10 |
1 2 3 4 5 6 7
|
mgcval |
⊢ ( 𝜑 → ( 𝐹 𝐻 𝐺 ↔ ( ( 𝐹 : 𝐴 ⟶ 𝐵 ∧ 𝐺 : 𝐵 ⟶ 𝐴 ) ∧ ∀ 𝑥 ∈ 𝐴 ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ) ) ) ) |
11 |
8 10
|
mpbid |
⊢ ( 𝜑 → ( ( 𝐹 : 𝐴 ⟶ 𝐵 ∧ 𝐺 : 𝐵 ⟶ 𝐴 ) ∧ ∀ 𝑥 ∈ 𝐴 ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ) ) ) |
12 |
11
|
simplld |
⊢ ( 𝜑 → 𝐹 : 𝐴 ⟶ 𝐵 ) |
13 |
12 9
|
ffvelrnd |
⊢ ( 𝜑 → ( 𝐹 ‘ 𝑋 ) ∈ 𝐵 ) |
14 |
2 4
|
prsref |
⊢ ( ( 𝑊 ∈ Proset ∧ ( 𝐹 ‘ 𝑋 ) ∈ 𝐵 ) → ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ) |
15 |
7 13 14
|
syl2anc |
⊢ ( 𝜑 → ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ) |
16 |
|
fveq2 |
⊢ ( 𝑥 = 𝑋 → ( 𝐹 ‘ 𝑥 ) = ( 𝐹 ‘ 𝑋 ) ) |
17 |
16
|
breq1d |
⊢ ( 𝑥 = 𝑋 → ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ) ) |
18 |
|
breq1 |
⊢ ( 𝑥 = 𝑋 → ( 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) ) |
19 |
17 18
|
bibi12d |
⊢ ( 𝑥 = 𝑋 → ( ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ) ↔ ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) ) ) |
20 |
19
|
ralbidv |
⊢ ( 𝑥 = 𝑋 → ( ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ) ↔ ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) ) ) |
21 |
11
|
simprd |
⊢ ( 𝜑 → ∀ 𝑥 ∈ 𝐴 ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑥 ) ≲ 𝑦 ↔ 𝑥 ≤ ( 𝐺 ‘ 𝑦 ) ) ) |
22 |
20 21 9
|
rspcdva |
⊢ ( 𝜑 → ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) ) |
23 |
|
simpr |
⊢ ( ( 𝜑 ∧ 𝑦 = ( 𝐹 ‘ 𝑋 ) ) → 𝑦 = ( 𝐹 ‘ 𝑋 ) ) |
24 |
23
|
breq2d |
⊢ ( ( 𝜑 ∧ 𝑦 = ( 𝐹 ‘ 𝑋 ) ) → ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ) ) |
25 |
23
|
fveq2d |
⊢ ( ( 𝜑 ∧ 𝑦 = ( 𝐹 ‘ 𝑋 ) ) → ( 𝐺 ‘ 𝑦 ) = ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) |
26 |
25
|
breq2d |
⊢ ( ( 𝜑 ∧ 𝑦 = ( 𝐹 ‘ 𝑋 ) ) → ( 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ↔ 𝑋 ≤ ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) ) |
27 |
24 26
|
bibi12d |
⊢ ( ( 𝜑 ∧ 𝑦 = ( 𝐹 ‘ 𝑋 ) ) → ( ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) ↔ ( ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ↔ 𝑋 ≤ ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) ) ) |
28 |
13 27
|
rspcdv |
⊢ ( 𝜑 → ( ∀ 𝑦 ∈ 𝐵 ( ( 𝐹 ‘ 𝑋 ) ≲ 𝑦 ↔ 𝑋 ≤ ( 𝐺 ‘ 𝑦 ) ) → ( ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ↔ 𝑋 ≤ ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) ) ) |
29 |
22 28
|
mpd |
⊢ ( 𝜑 → ( ( 𝐹 ‘ 𝑋 ) ≲ ( 𝐹 ‘ 𝑋 ) ↔ 𝑋 ≤ ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) ) |
30 |
15 29
|
mpbid |
⊢ ( 𝜑 → 𝑋 ≤ ( 𝐺 ‘ ( 𝐹 ‘ 𝑋 ) ) ) |