Proof of Theorem lspun
| Step | Hyp | Ref
| Expression |
| 1 | | simp1 1024 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑊 ∈ LMod) |
| 2 | | simp2 1025 |
. . . . . . 7
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑇 ⊆ 𝑉) |
| 3 | | simp3 1026 |
. . . . . . 7
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑈 ⊆ 𝑉) |
| 4 | 2, 3 | unssd 3399 |
. . . . . 6
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑇 ∪ 𝑈) ⊆ 𝑉) |
| 5 | | ssun1 3386 |
. . . . . . 7
⊢ 𝑇 ⊆ (𝑇 ∪ 𝑈) |
| 6 | 5 | a1i 9 |
. . . . . 6
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑇 ⊆ (𝑇 ∪ 𝑈)) |
| 7 | | lspss.v |
. . . . . . 7
⊢ 𝑉 = (Base‘𝑊) |
| 8 | | lspss.n |
. . . . . . 7
⊢ 𝑁 = (LSpan‘𝑊) |
| 9 | 7, 8 | lspss 14680 |
. . . . . 6
⊢ ((𝑊 ∈ LMod ∧ (𝑇 ∪ 𝑈) ⊆ 𝑉 ∧ 𝑇 ⊆ (𝑇 ∪ 𝑈)) → (𝑁‘𝑇) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 10 | 1, 4, 6, 9 | syl3anc 1274 |
. . . . 5
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘𝑇) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 11 | | ssun2 3387 |
. . . . . . 7
⊢ 𝑈 ⊆ (𝑇 ∪ 𝑈) |
| 12 | 11 | a1i 9 |
. . . . . 6
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑈 ⊆ (𝑇 ∪ 𝑈)) |
| 13 | 7, 8 | lspss 14680 |
. . . . . 6
⊢ ((𝑊 ∈ LMod ∧ (𝑇 ∪ 𝑈) ⊆ 𝑉 ∧ 𝑈 ⊆ (𝑇 ∪ 𝑈)) → (𝑁‘𝑈) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 14 | 1, 4, 12, 13 | syl3anc 1274 |
. . . . 5
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘𝑈) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 15 | 10, 14 | unssd 3399 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → ((𝑁‘𝑇) ∪ (𝑁‘𝑈)) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 16 | 7, 8 | lspssv 14679 |
. . . . 5
⊢ ((𝑊 ∈ LMod ∧ (𝑇 ∪ 𝑈) ⊆ 𝑉) → (𝑁‘(𝑇 ∪ 𝑈)) ⊆ 𝑉) |
| 17 | 1, 4, 16 | syl2anc 411 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘(𝑇 ∪ 𝑈)) ⊆ 𝑉) |
| 18 | 15, 17 | sstrd 3252 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → ((𝑁‘𝑇) ∪ (𝑁‘𝑈)) ⊆ 𝑉) |
| 19 | 7, 8 | lspssid 14681 |
. . . . 5
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉) → 𝑇 ⊆ (𝑁‘𝑇)) |
| 20 | 1, 2, 19 | syl2anc 411 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → 𝑇 ⊆ (𝑁‘𝑇)) |
| 21 | 7, 8 | lspssid 14681 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ 𝑈 ⊆ 𝑉) → 𝑈 ⊆ (𝑁‘𝑈)) |
| 22 | | unss12 3395 |
. . . 4
⊢ ((𝑇 ⊆ (𝑁‘𝑇) ∧ 𝑈 ⊆ (𝑁‘𝑈)) → (𝑇 ∪ 𝑈) ⊆ ((𝑁‘𝑇) ∪ (𝑁‘𝑈))) |
| 23 | 20, 21, 22 | 3imp3i2an 1210 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑇 ∪ 𝑈) ⊆ ((𝑁‘𝑇) ∪ (𝑁‘𝑈))) |
| 24 | 7, 8 | lspss 14680 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ ((𝑁‘𝑇) ∪ (𝑁‘𝑈)) ⊆ 𝑉 ∧ (𝑇 ∪ 𝑈) ⊆ ((𝑁‘𝑇) ∪ (𝑁‘𝑈))) → (𝑁‘(𝑇 ∪ 𝑈)) ⊆ (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈)))) |
| 25 | 1, 18, 23, 24 | syl3anc 1274 |
. 2
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘(𝑇 ∪ 𝑈)) ⊆ (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈)))) |
| 26 | 7, 8 | lspss 14680 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ (𝑁‘(𝑇 ∪ 𝑈)) ⊆ 𝑉 ∧ ((𝑁‘𝑇) ∪ (𝑁‘𝑈)) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) → (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈))) ⊆ (𝑁‘(𝑁‘(𝑇 ∪ 𝑈)))) |
| 27 | 1, 17, 15, 26 | syl3anc 1274 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈))) ⊆ (𝑁‘(𝑁‘(𝑇 ∪ 𝑈)))) |
| 28 | 7, 8 | lspidm 14682 |
. . . 4
⊢ ((𝑊 ∈ LMod ∧ (𝑇 ∪ 𝑈) ⊆ 𝑉) → (𝑁‘(𝑁‘(𝑇 ∪ 𝑈))) = (𝑁‘(𝑇 ∪ 𝑈))) |
| 29 | 1, 4, 28 | syl2anc 411 |
. . 3
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘(𝑁‘(𝑇 ∪ 𝑈))) = (𝑁‘(𝑇 ∪ 𝑈))) |
| 30 | 27, 29 | sseqtrd 3280 |
. 2
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈))) ⊆ (𝑁‘(𝑇 ∪ 𝑈))) |
| 31 | 25, 30 | eqssd 3259 |
1
⊢ ((𝑊 ∈ LMod ∧ 𝑇 ⊆ 𝑉 ∧ 𝑈 ⊆ 𝑉) → (𝑁‘(𝑇 ∪ 𝑈)) = (𝑁‘((𝑁‘𝑇) ∪ (𝑁‘𝑈)))) |