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← Session 35 — ii′-6-R: Lagarias 6.1 right-tail re-proof (E-032/D-073)

#2126 assistant 2026-08-26 05:39:33.800 UTC · 569→2451 tok open ⤢
thinking (5622 chars)
Now only one real error remains: `rw [e]` fails — pattern `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` "not found" in the target that visibly contains exactly that string. This is the classic rw-elaboration mismatch: the pattern in `e` and the occurrence in the goal must be DEFEQ but syntactically different in a way rw's keyed matching rejects. What's the difference? The `e` statement was elaborated with `(n : ℝ) ^ 3` from MY source `(n : ℝ) ^ 3` — same. Hmm. OH WAIT. I see it — look at the goal: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3 ≤ 1 / 2 * (ArithmeticFunction.vonMangoldt n / ↑n ^ 2)`. And e's LHS: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3`. These look identical... but there's a subtle elaboration issue: in `e`, I wrote `ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3` — same. Hmm. The actual issue might be that rw [e] with e proved by field_simp — the e in context has its LHS in a field_simp-NORMALIZED form? No — e's TYPE is what I wrote (the have ascription pins it). Hold on — the goal at error shows `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` and e : `ArithmeticFunction.vonMangoldt n / ↑n ^ 3 = 1 / ↑n * (...)`. rw [e] rewrites instances of e's LHS in the goal. Pattern not found?! OH — I bet it's the `split`'s if-goal: the goal after `split` in the `next hn` branch — the displayed goal might have the Λ-term under a DIFFERENT form than what hΛ produced. After `rw [hΛ]`, the goal is what I see. And rw [e] fails... Let me think about associativity/notation: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` — parses as `ArithmeticFunction.vonMangoldt n / (↑n ^ 3)` ✓ (^ binds tighter than /). e's LHS identical. Alternative: maybe `↑n ^ 3` vs `(↑n) ^ 3` vs `↑(n ^ 3)` — the goal's `↑n ^ 3` could be `((n:ℝ)) ^ 3` and e's `↑n ^ 3` also `(n:ℝ)^3` — same. Hmm — is it possible that the `have e` elaborated `ArithmeticFunction.vonMangoldt n / (n:ℝ)^3` with a DIFFERENT `n` (the have's binder auto-bound?) — no, n is in context. The classic fix: use `conv_lhs => rw [e]` or `rw [show ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3 = (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) from e]`, or sidestep with `calc`/`nlinarith`/`gcongr`. Simplest robust: skip rw and use e via linarith-style: ``` have h12 : (1 : ℝ) / (n : ℝ) ≤ 1 / 2 := by rw [div_le_div_iff_of_pos_left (by norm_num : (0 : ℝ) < 1) (by norm_num : (0 : ℝ) < 2) (by positivity : (0 : ℝ) < (n : ℝ))] exact_mod_cast hn2 have hpos : (0 : ℝ) ≤ ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2 := div_nonneg ArithmeticFunction.vonMangoldt_nonneg (pow_nonneg (by positivity : (0 : ℝ) ≤ (n : ℝ)) 2) calc ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3 = (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := e _ ≤ (1 / 2) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := mul_le_mul_of_nonneg_right h12 hpos ``` calc step 1 uses `:= e` directly (no rw) ✓ — avoids the rw-matching issue entirely. Hmm — but why did rw fail? Ohh — I wonder: maybe `rw [e]` rewrites LEFT-TO-RIGHT but e's RHS contains the goal's RHS factor... no. Whatever — the calc route is robust. Actually — wait, I wonder if the issue is that `e`'s elaborated LHS is `HDiv.hDiv (ArithmeticFunction.vonMangoldt n) ((n:ℝ)^3)` while the goal has `HDiv.hDiv (ArithmeticFunction.vonMangoldt n) ((n:ℝ)^3)` — identical... The one real possibility: the `split`'s two goals from the two ifs in norm_term_eq — the `next hn` branch is for the SECOND if?? `simp only [LSeries.norm_term_eq, h3re, h2re]` produces ‖...‖ with TWO ifs (one per side); `split` splits the first matching if-cond — both ifs share the condition n = 0, so split should split both (it splits all ifs with the same condition? or the first?). If split split only ONE if, the `next hn` branch might have one side still wrapped in `if n = 0 then 0 else ...` and the displayed goal is post-simp... The displayed goal at the error is clean (no ifs) — so both split ✓. Hmm — actually, let me look at the hΛ rewrite: after rw [hΛ], did the goal change at all? If ‖↑(Λ n)‖ didn't appear in the goal (because norm_term_eq's output was already ‖Λ n‖ with a different norm form — e.g., Complex.abs vs the norm notation), the rw [hΛ] might have failed silently... no — rw fails loudly if the pattern isn't found. Actually — you know what, let me look at norm_term_eq again: `lemma norm_term_eq (f : ℕ → ℂ) (s : ℂ) (n : ℕ) : ‖term f s n‖ = if n = 0 then 0 else ‖f n‖ / n ^ s.re` — with f := fun n => (vonMangoldt n : ℂ): ‖f n‖ = ‖(fun n => (vonMangoldt n : ℂ)) n‖ — a LAMBDA APPLICATION (beta-redex)! After simp only [norm_term_eq], the goal has ‖(fun n => (↑(Λ n)) : ℂ) n‖ — beta-reduced by simp probably ✓. And hΛ's LHS is ‖(ArithmeticFunction.vonMangoldt n : ℂ)‖ — if the goal's is ‖(fun n => (↑(Λ n):ℂ)) n‖ NOT beta-reduced, then rw [hΛ] would FAIL — but it didn't error (222 was the only error, the trailing ring). So hΛ worked ✓. OK let me stop theorizing — the calc route sidesteps it. Also possible that `e`'s universe/elaboration made its LHS `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` with the coercion on n^3 as `Nat.cast (n^3)` vs goal's `(n:ℝ)^3` — DIFFERENT! The norm_term_eq produces `n ^ s.re` where n is... `‖f n‖ / n ^ s.re` — here `n` in `n ^ s.re` : the base is (n : ℝ)? — in norm_term_eq's statement: `‖f n‖ / n ^ s.re` with s.re : ℝ and n : ℕ — the base must be (n : ℝ) (cast) ✓ and my e's base `(n : ℝ) ^ 3` ✓ same. UNLESS norm_term_eq's base is written as `↑n` and mine as `(n : ℝ)` — those are the SAME term (OfNat/Nat.cast notation ✓). Fine — calc route. Apply it.
The `rw [e]` matching is flaky here — sidestepping with a direct `calc` that uses `e` as a term (no rewrite matching).
tool: Edit
input
{
  "file_path": "D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean",
  "old_string": "      have e : ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 3 =\n          (1 / (n : \u211d)) * (ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 2) := by\n        field_simp [show (n : \u211d) \u2260 0 by positivity]\n      rw [e]\n      apply mul_le_mul_of_nonneg_right _\n        (div_nonneg ArithmeticFunction.vonMangoldt_nonneg\n          (pow_nonneg (by positivity : (0 : \u211d) \u2264 (n : \u211d)) 2))\n      rw [div_le_div_iff_of_pos_left (by norm_num : (0 : \u211d) < 1)\n        (by norm_num : (0 : \u211d) < 2) (by positivity : (0 : \u211d) < (n : \u211d))]\n      exact_mod_cast hn2",
  "new_string": "      have e : ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 3 =\n          (1 / (n : \u211d)) * (ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 2) := by\n        field_simp [show (n : \u211d) \u2260 0 by positivity]\n      have h12 : (1 : \u211d) / (n : \u211d) \u2264 1 / 2 := by\n        rw [div_le_div_iff_of_pos_left (by norm_num : (0 : \u211d) < 1)\n          (by norm_num : (0 : \u211d) < 2) (by positivity : (0 : \u211d) < (n : \u211d))]\n        exact_mod_cast hn2\n      have hpos : (0 : \u211d) \u2264 ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 2 :=\n        div_nonneg ArithmeticFunction.vonMangoldt_nonneg\n          (pow_nonneg (by positivity : (0 : \u211d) \u2264 (n : \u211d)) 2)\n      calc ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 3\n          = (1 / (n : \u211d)) * (ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 2) := e\n        _ \u2264 (1 / 2) * (ArithmeticFunction.vonMangoldt n / (n : \u211d) ^ 2) :=\n            mul_le_mul_of_nonneg_right h12 hpos"
}
raw content_json (database row)
[{"type":"thinking","thinking":"Now only one real error remains: `rw [e]` fails — pattern `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` \"not found\" in the target that visibly contains exactly that string. This is the classic rw-elaboration mismatch: the pattern in `e` and the occurrence in the goal must be DEFEQ but syntactically different in a way rw's keyed matching rejects. What's the difference? The `e` statement was elaborated with `(n : ℝ) ^ 3` from MY source `(n : ℝ) ^ 3` — same. Hmm.\n\nOH WAIT. I see it — look at the goal: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3 ≤ 1 / 2 * (ArithmeticFunction.vonMangoldt n / ↑n ^ 2)`. And e's LHS: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3`. These look identical... but there's a subtle elaboration issue: in `e`, I wrote `ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3` — same. Hmm.\n\nThe actual issue might be that rw [e] with e proved by field_simp — the e in context has its LHS in a field_simp-NORMALIZED form? No — e's TYPE is what I wrote (the have ascription pins it).\n\nHold on — the goal at error shows `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` and e : `ArithmeticFunction.vonMangoldt n / ↑n ^ 3 = 1 / ↑n * (...)`. rw [e] rewrites instances of e's LHS in the goal. Pattern not found?! \n\nOH — I bet it's the `split`'s if-goal: the goal after `split` in the `next hn` branch — the displayed goal might have the Λ-term under a DIFFERENT form than what hΛ produced. After `rw [hΛ]`, the goal is what I see. And rw [e] fails...\n\nLet me think about associativity/notation: `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` — parses as `ArithmeticFunction.vonMangoldt n / (↑n ^ 3)` ✓ (^ binds tighter than /). e's LHS identical.\n\nAlternative: maybe `↑n ^ 3` vs `(↑n) ^ 3` vs `↑(n ^ 3)` — the goal's `↑n ^ 3` could be `((n:ℝ)) ^ 3` and e's `↑n ^ 3` also `(n:ℝ)^3` — same.\n\nHmm — is it possible that the `have e` elaborated `ArithmeticFunction.vonMangoldt n / (n:ℝ)^3` with a DIFFERENT `n` (the have's binder auto-bound?) — no, n is in context.\n\nThe classic fix: use `conv_lhs => rw [e]` or `rw [show ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3 = (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) from e]`, or sidestep with `calc`/`nlinarith`/`gcongr`. Simplest robust: skip rw and use e via linarith-style: \n```\n      have h12 : (1 : ℝ) / (n : ℝ) ≤ 1 / 2 := by\n        rw [div_le_div_iff_of_pos_left (by norm_num : (0 : ℝ) < 1)\n          (by norm_num : (0 : ℝ) < 2) (by positivity : (0 : ℝ) < (n : ℝ))]\n        exact_mod_cast hn2\n      have hpos : (0 : ℝ) ≤ ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2 :=\n        div_nonneg ArithmeticFunction.vonMangoldt_nonneg\n          (pow_nonneg (by positivity : (0 : ℝ) ≤ (n : ℝ)) 2)\n      calc ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3\n          = (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := e\n        _ ≤ (1 / 2) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) :=\n            mul_le_mul_of_nonneg_right h12 hpos\n```\ncalc step 1 uses `:= e` directly (no rw) ✓ — avoids the rw-matching issue entirely.\n\nHmm — but why did rw fail? Ohh — I wonder: maybe `rw [e]` rewrites LEFT-TO-RIGHT but e's RHS contains the goal's RHS factor... no. Whatever — the calc route is robust. Actually — wait, I wonder if the issue is that `e`'s elaborated LHS is `HDiv.hDiv (ArithmeticFunction.vonMangoldt n) ((n:ℝ)^3)` while the goal has `HDiv.hDiv (ArithmeticFunction.vonMangoldt n) ((n:ℝ)^3)` — identical... The one real possibility: the `split`'s two goals from the two ifs in norm_term_eq — the `next hn` branch is for the SECOND if?? `simp only [LSeries.norm_term_eq, h3re, h2re]` produces ‖...‖ with TWO ifs (one per side); `split` splits the first matching if-cond — both ifs share the condition n = 0, so split should split both (it splits all ifs with the same condition? or the first?). If split split only ONE if, the `next hn` branch might have one side still wrapped in `if n = 0 then 0 else ...` and the displayed goal is post-simp... The displayed goal at the error is clean (no ifs) — so both split ✓.\n\nHmm — actually, let me look at the hΛ rewrite: after rw [hΛ], did the goal change at all? If ‖↑(Λ n)‖ didn't appear in the goal (because norm_term_eq's output was already ‖Λ n‖ with a different norm form — e.g., Complex.abs vs the norm notation), the rw [hΛ] might have failed silently... no — rw fails loudly if the pattern isn't found.\n\nActually — you know what, let me look at norm_term_eq again: `lemma norm_term_eq (f : ℕ → ℂ) (s : ℂ) (n : ℕ) : ‖term f s n‖ = if n = 0 then 0 else ‖f n‖ / n ^ s.re` — with f := fun n => (vonMangoldt n : ℂ): ‖f n‖ = ‖(fun n => (vonMangoldt n : ℂ)) n‖ — a LAMBDA APPLICATION (beta-redex)! After simp only [norm_term_eq], the goal has ‖(fun n => (↑(Λ n)) : ℂ) n‖ — beta-reduced by simp probably ✓. And hΛ's LHS is ‖(ArithmeticFunction.vonMangoldt n : ℂ)‖ — if the goal's is ‖(fun n => (↑(Λ n):ℂ)) n‖ NOT beta-reduced, then rw [hΛ] would FAIL — but it didn't error (222 was the only error, the trailing ring). So hΛ worked ✓.\n\nOK let me stop theorizing — the calc route sidesteps it. Also possible that `e`'s universe/elaboration made its LHS `ArithmeticFunction.vonMangoldt n / ↑n ^ 3` with the coercion on n^3 as `Nat.cast (n^3)` vs goal's `(n:ℝ)^3` — DIFFERENT! The norm_term_eq produces `n ^ s.re` where n is... `‖f n‖ / n ^ s.re` — here `n` in `n ^ s.re` : the base is (n : ℝ)? — in norm_term_eq's statement: `‖f n‖ / n ^ s.re` with s.re : ℝ and n : ℕ — the base must be (n : ℝ) (cast) ✓ and my e's base `(n : ℝ) ^ 3` ✓ same. UNLESS norm_term_eq's base is written as `↑n` and mine as `(n : ℝ)` — those are the SAME term (OfNat/Nat.cast notation ✓).\n\nFine — calc route. Apply it.","signature":""},{"type":"text","text":"The `rw [e]` matching is flaky here — sidestepping with a direct `calc` that uses `e` as a term (no rewrite matching)."},{"type":"tool_use","id":"Edit_222","name":"Edit","input":{"file_path":"D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean","old_string":"      have e : ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3 =\n          (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := by\n        field_simp [show (n : ℝ) ≠ 0 by positivity]\n      rw [e]\n      apply mul_le_mul_of_nonneg_right _\n        (div_nonneg ArithmeticFunction.vonMangoldt_nonneg\n          (pow_nonneg (by positivity : (0 : ℝ) ≤ (n : ℝ)) 2))\n      rw [div_le_div_iff_of_pos_left (by norm_num : (0 : ℝ) < 1)\n        (by norm_num : (0 : ℝ) < 2) (by positivity : (0 : ℝ) < (n : ℝ))]\n      exact_mod_cast hn2","new_string":"      have e : ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3 =\n          (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := by\n        field_simp [show (n : ℝ) ≠ 0 by positivity]\n      have h12 : (1 : ℝ) / (n : ℝ) ≤ 1 / 2 := by\n        rw [div_le_div_iff_of_pos_left (by norm_num : (0 : ℝ) < 1)\n          (by norm_num : (0 : ℝ) < 2) (by positivity : (0 : ℝ) < (n : ℝ))]\n        exact_mod_cast hn2\n      have hpos : (0 : ℝ) ≤ ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2 :=\n        div_nonneg ArithmeticFunction.vonMangoldt_nonneg\n          (pow_nonneg (by positivity : (0 : ℝ) ≤ (n : ℝ)) 2)\n      calc ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 3\n          = (1 / (n : ℝ)) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) := e\n        _ ≤ (1 / 2) * (ArithmeticFunction.vonMangoldt n / (n : ℝ) ^ 2) :=\n            mul_le_mul_of_nonneg_right h12 hpos"},"extra_content":null}]