Proof of Theorem vr1cl
| Step | Hyp | Ref
| Expression |
| 1 | | vr1cl.x |
. . 3
⊢ 𝑋 = (var1‘𝑅) |
| 2 | 1 | vr1val 22130 |
. 2
⊢ 𝑋 = ((1o mVar 𝑅)‘∅) |
| 3 | | eqid 2734 |
. . 3
⊢
(1o mPoly 𝑅) = (1o mPoly 𝑅) |
| 4 | | eqid 2734 |
. . 3
⊢
(1o mVar 𝑅) = (1o mVar 𝑅) |
| 5 | | vr1cl.p |
. . . 4
⊢ 𝑃 = (Poly1‘𝑅) |
| 6 | | vr1cl.b |
. . . 4
⊢ 𝐵 = (Base‘𝑃) |
| 7 | 5, 6 | ply1bas 22133 |
. . 3
⊢ 𝐵 = (Base‘(1o
mPoly 𝑅)) |
| 8 | | 1onn 8566 |
. . . 4
⊢
1o ∈ ω |
| 9 | 8 | a1i 11 |
. . 3
⊢ (𝑅 ∈ Ring →
1o ∈ ω) |
| 10 | | id 22 |
. . 3
⊢ (𝑅 ∈ Ring → 𝑅 ∈ Ring) |
| 11 | | 0lt1o 8429 |
. . . 4
⊢ ∅
∈ 1o |
| 12 | 11 | a1i 11 |
. . 3
⊢ (𝑅 ∈ Ring → ∅
∈ 1o) |
| 13 | 3, 4, 7, 9, 10, 12 | mvrcl 21945 |
. 2
⊢ (𝑅 ∈ Ring →
((1o mVar 𝑅)‘∅) ∈ 𝐵) |
| 14 | 2, 13 | eqeltrid 2838 |
1
⊢ (𝑅 ∈ Ring → 𝑋 ∈ 𝐵) |