Step |
Hyp |
Ref |
Expression |
1 |
|
lcfls1.c |
⊢ 𝐶 = { 𝑓 ∈ 𝐹 ∣ ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝑓 ) ) ) = ( 𝐿 ‘ 𝑓 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝑓 ) ) ⊆ 𝑄 ) } |
2 |
|
lcfls1.g |
⊢ ( 𝜑 → 𝐺 ∈ 𝐹 ) |
3 |
1
|
lcfls1lem |
⊢ ( 𝐺 ∈ 𝐶 ↔ ( 𝐺 ∈ 𝐹 ∧ ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ) |
4 |
|
3anass |
⊢ ( ( 𝐺 ∈ 𝐹 ∧ ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ↔ ( 𝐺 ∈ 𝐹 ∧ ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ) ) |
5 |
3 4
|
bitri |
⊢ ( 𝐺 ∈ 𝐶 ↔ ( 𝐺 ∈ 𝐹 ∧ ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ) ) |
6 |
2
|
biantrurd |
⊢ ( 𝜑 → ( ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ↔ ( 𝐺 ∈ 𝐹 ∧ ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ) ) ) |
7 |
5 6
|
bitr4id |
⊢ ( 𝜑 → ( 𝐺 ∈ 𝐶 ↔ ( ( ⊥ ‘ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ) = ( 𝐿 ‘ 𝐺 ) ∧ ( ⊥ ‘ ( 𝐿 ‘ 𝐺 ) ) ⊆ 𝑄 ) ) ) |