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Description: The range of a subword is a subset of the range of that word. Stronger version of swrdrn . (Contributed by Thierry Arnoux, 12-Dec-2023)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | swrdrn2 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ran ( 𝑊 substr 〈 𝑀 , 𝑁 〉 ) ⊆ ran 𝑊 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | swrdval2 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ( 𝑊 substr 〈 𝑀 , 𝑁 〉 ) = ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) ) | |
| 2 | 1 | rneqd | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ran ( 𝑊 substr 〈 𝑀 , 𝑁 〉 ) = ran ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) ) |
| 3 | eqidd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( ♯ ‘ 𝑊 ) = ( ♯ ‘ 𝑊 ) ) | |
| 4 | simpl1 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑊 ∈ Word 𝑉 ) | |
| 5 | 3 4 | wrdfd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑊 : ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ⟶ 𝑉 ) |
| 6 | 5 | ffund | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → Fun 𝑊 ) |
| 7 | elfzuz3 | ⊢ ( 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) → ( ♯ ‘ 𝑊 ) ∈ ( ℤ≥ ‘ 𝑁 ) ) | |
| 8 | 7 | 3ad2ant3 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ( ♯ ‘ 𝑊 ) ∈ ( ℤ≥ ‘ 𝑁 ) ) |
| 9 | 8 | adantr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( ♯ ‘ 𝑊 ) ∈ ( ℤ≥ ‘ 𝑁 ) ) |
| 10 | fzoss2 | ⊢ ( ( ♯ ‘ 𝑊 ) ∈ ( ℤ≥ ‘ 𝑁 ) → ( 0 ..^ 𝑁 ) ⊆ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) | |
| 11 | 9 10 | syl | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 0 ..^ 𝑁 ) ⊆ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 12 | elfzuz | ⊢ ( 𝑀 ∈ ( 0 ... 𝑁 ) → 𝑀 ∈ ( ℤ≥ ‘ 0 ) ) | |
| 13 | 12 | 3ad2ant2 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → 𝑀 ∈ ( ℤ≥ ‘ 0 ) ) |
| 14 | 13 | adantr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑀 ∈ ( ℤ≥ ‘ 0 ) ) |
| 15 | fzoss1 | ⊢ ( 𝑀 ∈ ( ℤ≥ ‘ 0 ) → ( 𝑀 ..^ 𝑁 ) ⊆ ( 0 ..^ 𝑁 ) ) | |
| 16 | 14 15 | syl | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑀 ..^ 𝑁 ) ⊆ ( 0 ..^ 𝑁 ) ) |
| 17 | simpr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) | |
| 18 | simpl3 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) | |
| 19 | 18 | elfzelzd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑁 ∈ ℤ ) |
| 20 | simpl2 | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑀 ∈ ( 0 ... 𝑁 ) ) | |
| 21 | 20 | elfzelzd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → 𝑀 ∈ ℤ ) |
| 22 | fzoaddel2 | ⊢ ( ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ ) → ( 𝑥 + 𝑀 ) ∈ ( 𝑀 ..^ 𝑁 ) ) | |
| 23 | 17 19 21 22 | syl3anc | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑥 + 𝑀 ) ∈ ( 𝑀 ..^ 𝑁 ) ) |
| 24 | 16 23 | sseldd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑥 + 𝑀 ) ∈ ( 0 ..^ 𝑁 ) ) |
| 25 | 11 24 | sseldd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑥 + 𝑀 ) ∈ ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 26 | wrddm | ⊢ ( 𝑊 ∈ Word 𝑉 → dom 𝑊 = ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) | |
| 27 | 26 | 3ad2ant1 | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → dom 𝑊 = ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 28 | 27 | adantr | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → dom 𝑊 = ( 0 ..^ ( ♯ ‘ 𝑊 ) ) ) |
| 29 | 25 28 | eleqtrrd | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑥 + 𝑀 ) ∈ dom 𝑊 ) |
| 30 | fvelrn | ⊢ ( ( Fun 𝑊 ∧ ( 𝑥 + 𝑀 ) ∈ dom 𝑊 ) → ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ∈ ran 𝑊 ) | |
| 31 | 6 29 30 | syl2anc | ⊢ ( ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) ∧ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ) → ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ∈ ran 𝑊 ) |
| 32 | 31 | ralrimiva | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ∀ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ∈ ran 𝑊 ) |
| 33 | eqid | ⊢ ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) = ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) | |
| 34 | 33 | rnmptss | ⊢ ( ∀ 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ∈ ran 𝑊 → ran ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) ⊆ ran 𝑊 ) |
| 35 | 32 34 | syl | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ran ( 𝑥 ∈ ( 0 ..^ ( 𝑁 − 𝑀 ) ) ↦ ( 𝑊 ‘ ( 𝑥 + 𝑀 ) ) ) ⊆ ran 𝑊 ) |
| 36 | 2 35 | eqsstrd | ⊢ ( ( 𝑊 ∈ Word 𝑉 ∧ 𝑀 ∈ ( 0 ... 𝑁 ) ∧ 𝑁 ∈ ( 0 ... ( ♯ ‘ 𝑊 ) ) ) → ran ( 𝑊 substr 〈 𝑀 , 𝑁 〉 ) ⊆ ran 𝑊 ) |