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Description: Theorem 12. of RosserSchoenfeld p. 71. Theorem chpo1ubb states that the psi function is bounded by a linear term; this axiom postulates an upper bound for that linear term. This is stated as an axiom until a formal proof can be provided. (Contributed by Thierry Arnoux, 28-Dec-2021)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | ax-ros335 | ⊢ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) < ( ( 1 . _ 0 _ 3 _ 8 _ 8 3 ) · 𝑥 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 0 | vx | ⊢ 𝑥 | |
| 1 | crp | ⊢ ℝ+ | |
| 2 | cchp | ⊢ ψ | |
| 3 | 0 | cv | ⊢ 𝑥 |
| 4 | 3 2 | cfv | ⊢ ( ψ ‘ 𝑥 ) |
| 5 | clt | ⊢ < | |
| 6 | c1 | ⊢ 1 | |
| 7 | cdp | ⊢ . | |
| 8 | cc0 | ⊢ 0 | |
| 9 | c3 | ⊢ 3 | |
| 10 | c8 | ⊢ 8 | |
| 11 | 10 9 | cdp2 | ⊢ _ 8 3 |
| 12 | 10 11 | cdp2 | ⊢ _ 8 _ 8 3 |
| 13 | 9 12 | cdp2 | ⊢ _ 3 _ 8 _ 8 3 |
| 14 | 8 13 | cdp2 | ⊢ _ 0 _ 3 _ 8 _ 8 3 |
| 15 | 6 14 7 | co | ⊢ ( 1 . _ 0 _ 3 _ 8 _ 8 3 ) |
| 16 | cmul | ⊢ · | |
| 17 | 15 3 16 | co | ⊢ ( ( 1 . _ 0 _ 3 _ 8 _ 8 3 ) · 𝑥 ) |
| 18 | 4 17 5 | wbr | ⊢ ( ψ ‘ 𝑥 ) < ( ( 1 . _ 0 _ 3 _ 8 _ 8 3 ) · 𝑥 ) |
| 19 | 18 0 1 | wral | ⊢ ∀ 𝑥 ∈ ℝ+ ( ψ ‘ 𝑥 ) < ( ( 1 . _ 0 _ 3 _ 8 _ 8 3 ) · 𝑥 ) |