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Description: The psi function is upper bounded by a linear term. (Contributed by Mario Carneiro, 31-May-2016)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | chpo1ubb | ⊢ ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) ≤ ( 𝑐 · 𝑥 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpssre | ⊢ ℝ+ ⊆ ℝ | |
| 2 | 1 | a1i | ⊢ ( ⊤ → ℝ+ ⊆ ℝ ) |
| 3 | 1red | ⊢ ( ⊤ → 1 ∈ ℝ ) | |
| 4 | simpr | ⊢ ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) → 𝑥 ∈ ℝ+ ) | |
| 5 | 4 | rpred | ⊢ ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) → 𝑥 ∈ ℝ ) |
| 6 | chpcl | ⊢ ( 𝑥 ∈ ℝ → ( ψ ‘ 𝑥 ) ∈ ℝ ) | |
| 7 | 5 6 | syl | ⊢ ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) → ( ψ ‘ 𝑥 ) ∈ ℝ ) |
| 8 | 7 4 | rerpdivcld | ⊢ ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) → ( ( ψ ‘ 𝑥 ) / 𝑥 ) ∈ ℝ ) |
| 9 | chpo1ub | ⊢ ( 𝑥 ∈ ℝ+ ↦ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ) ∈ 𝑂(1) | |
| 10 | 9 | a1i | ⊢ ( ⊤ → ( 𝑥 ∈ ℝ+ ↦ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ) ∈ 𝑂(1) ) |
| 11 | 8 10 | o1lo1d | ⊢ ( ⊤ → ( 𝑥 ∈ ℝ+ ↦ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ) ∈ ≤𝑂(1) ) |
| 12 | chpcl | ⊢ ( 𝑦 ∈ ℝ → ( ψ ‘ 𝑦 ) ∈ ℝ ) | |
| 13 | 12 | ad2antrl | ⊢ ( ( ⊤ ∧ ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ) → ( ψ ‘ 𝑦 ) ∈ ℝ ) |
| 14 | 13 | rehalfcld | ⊢ ( ( ⊤ ∧ ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ) → ( ( ψ ‘ 𝑦 ) / 2 ) ∈ ℝ ) |
| 15 | 5 | adantr | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 ∈ ℝ ) |
| 16 | chpeq0 | ⊢ ( 𝑥 ∈ ℝ → ( ( ψ ‘ 𝑥 ) = 0 ↔ 𝑥 < 2 ) ) | |
| 17 | 15 16 | syl | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → ( ( ψ ‘ 𝑥 ) = 0 ↔ 𝑥 < 2 ) ) |
| 18 | 17 | biimpar | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 𝑥 < 2 ) → ( ψ ‘ 𝑥 ) = 0 ) |
| 19 | 18 | oveq1d | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 𝑥 < 2 ) → ( ( ψ ‘ 𝑥 ) / 𝑥 ) = ( 0 / 𝑥 ) ) |
| 20 | 4 | adantr | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 ∈ ℝ+ ) |
| 21 | 20 | rpcnd | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 ∈ ℂ ) |
| 22 | 20 | rpne0d | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 ≠ 0 ) |
| 23 | 21 22 | div0d | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → ( 0 / 𝑥 ) = 0 ) |
| 24 | 13 | ad2ant2r | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → ( ψ ‘ 𝑦 ) ∈ ℝ ) |
| 25 | 2rp | ⊢ 2 ∈ ℝ+ | |
| 26 | 25 | a1i | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 2 ∈ ℝ+ ) |
| 27 | simprll | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑦 ∈ ℝ ) | |
| 28 | chpge0 | ⊢ ( 𝑦 ∈ ℝ → 0 ≤ ( ψ ‘ 𝑦 ) ) | |
| 29 | 27 28 | syl | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 0 ≤ ( ψ ‘ 𝑦 ) ) |
| 30 | 24 26 29 | divge0d | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 0 ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 31 | 23 30 | eqbrtrd | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → ( 0 / 𝑥 ) ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 32 | 31 | adantr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 𝑥 < 2 ) → ( 0 / 𝑥 ) ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 33 | 19 32 | eqbrtrd | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 𝑥 < 2 ) → ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 34 | 7 | ad2antrr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → ( ψ ‘ 𝑥 ) ∈ ℝ ) |
| 35 | 24 | adantr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → ( ψ ‘ 𝑦 ) ∈ ℝ ) |
| 36 | 25 | a1i | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 2 ∈ ℝ+ ) |
| 37 | 15 | adantr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 𝑥 ∈ ℝ ) |
| 38 | chpge0 | ⊢ ( 𝑥 ∈ ℝ → 0 ≤ ( ψ ‘ 𝑥 ) ) | |
| 39 | 37 38 | syl | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 0 ≤ ( ψ ‘ 𝑥 ) ) |
| 40 | 27 | adantr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 𝑦 ∈ ℝ ) |
| 41 | simprr | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 < 𝑦 ) | |
| 42 | 15 27 41 | ltled | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 𝑥 ≤ 𝑦 ) |
| 43 | 42 | adantr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 𝑥 ≤ 𝑦 ) |
| 44 | chpwordi | ⊢ ( ( 𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑥 ≤ 𝑦 ) → ( ψ ‘ 𝑥 ) ≤ ( ψ ‘ 𝑦 ) ) | |
| 45 | 37 40 43 44 | syl3anc | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → ( ψ ‘ 𝑥 ) ≤ ( ψ ‘ 𝑦 ) ) |
| 46 | simpr | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → 2 ≤ 𝑥 ) | |
| 47 | 34 35 36 37 39 45 46 | lediv12ad | ⊢ ( ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) ∧ 2 ≤ 𝑥 ) → ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 48 | 2re | ⊢ 2 ∈ ℝ | |
| 49 | 48 | a1i | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → 2 ∈ ℝ ) |
| 50 | 33 47 15 49 | ltlecasei | ⊢ ( ( ( ⊤ ∧ 𝑥 ∈ ℝ+ ) ∧ ( ( 𝑦 ∈ ℝ ∧ 1 ≤ 𝑦 ) ∧ 𝑥 < 𝑦 ) ) → ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ ( ( ψ ‘ 𝑦 ) / 2 ) ) |
| 51 | 2 3 8 11 14 50 | lo1bddrp | ⊢ ( ⊤ → ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ 𝑐 ) |
| 52 | 51 | mptru | ⊢ ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ 𝑐 |
| 53 | simpr | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → 𝑥 ∈ ℝ+ ) | |
| 54 | 53 | rpred | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → 𝑥 ∈ ℝ ) |
| 55 | 54 6 | syl | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → ( ψ ‘ 𝑥 ) ∈ ℝ ) |
| 56 | simpl | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → 𝑐 ∈ ℝ+ ) | |
| 57 | 56 | rpred | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → 𝑐 ∈ ℝ ) |
| 58 | 55 57 53 | ledivmul2d | ⊢ ( ( 𝑐 ∈ ℝ+ ∧ 𝑥 ∈ ℝ+ ) → ( ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ 𝑐 ↔ ( ψ ‘ 𝑥 ) ≤ ( 𝑐 · 𝑥 ) ) ) |
| 59 | 58 | ralbidva | ⊢ ( 𝑐 ∈ ℝ+ → ( ∀ 𝑥 ∈ ℝ+ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ 𝑐 ↔ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) ≤ ( 𝑐 · 𝑥 ) ) ) |
| 60 | 59 | rexbiia | ⊢ ( ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ( ψ ‘ 𝑥 ) / 𝑥 ) ≤ 𝑐 ↔ ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) ≤ ( 𝑐 · 𝑥 ) ) |
| 61 | 52 60 | mpbi | ⊢ ∃ 𝑐 ∈ ℝ+ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) ≤ ( 𝑐 · 𝑥 ) |