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

#2178 assistant 2026-08-26 09:42:56.206 UTC · 2318→1941 tok open ⤢
thinking (4363 chars)
Now I see: 1. **Line 1118**: the goal is `Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1)) = Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1))`?? — the display shows `↑m ^ (2 * (√↑n - 1 + 1 - 1))` — the exponent after `rw [show (2·√↑n) = (2·√↑n−2)+2 by ring, Real.rpow_add hm2]` — my show rewrote `2·√↑n` as `(2·√↑n−2)+2` and then rpow_add — but the display shows `2 * (√↑n − 1 + 1 − 1)` — the field_simp normalized `(2·√↑n−2)+2` to `2·(√↑n−1+1−1)`?? — and the goal is `Λ m · ↑m^(that) = Λ m · ↑m^(that)` — IDENTICAL sides — should close by rfl!! "unsolved goals" with identical sides — means field_simp normalized but the final `ring` (I don't have one — my e proof is `rw [...]; field_simp [hm2.ne']` — field_simp left this identical-sides goal UNCLOSED). Add `ring` after field_simp... — or the sides differ subtly: LHS `Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1))` and RHS — the display only shows the LHS (truncated at =). The full goal is probably `Λ m * ↑m^(2(√↑n−1+1−1)) = Λ m * ↑m^(2(√↑n−2))`?? — exponent arithmetic mismatch: field_simp didn't unify `2(√↑n−1+1−1)` with `2(√↑n−2)` — add `ring_nf` or `ring` — `ring` should close (exponent arithmetic is ring). Add `ring` after field_simp... but if field_simp closes, ring errors — here it did NOT close, so ring is needed: ``` rw [show (2 * Real.sqrt (n : ℝ)) = (2 * Real.sqrt (n : ℝ) - 2) + 2 by ring, Real.rpow_add hm2] field_simp [hm2.ne'] ring ``` Hmm — but the banked gotcha: trailing ring errors when field_simp closes. Here it demonstrably didn't close (identical-sides leftover with different exponent normal forms). Use `ring_nf` instead — ring_nf normalizes and closes if the normal forms match; if the goal was already closed by field_simp, ring_nf errors "no goals"... — gamble. The leftover shows NON-closed, so ring_nf is needed. But earlier similar spots used `field_simp; ring` and field_simp closed (the banked gotcha was the reverse). Use `ring` (the leftover is a ring identity: `Λ m · ↑m^(2(√↑n−1+1−1)) = Λ m · ↑m^(2(√↑n−2))` — ring proves exponent arithmetic `2(√↑n−1+1−1) = 2(√↑n−2)` ✓ and the rest is identical ✓). Hmm wait — actually looking again at the displayed goal: `⊢ ArithmeticFunction.vonMangoldt m * ↑m ^ (2 * (√↑n - 1 + 1 - 1)) =` (truncated) — the sides might be `Λ m * ↑m^(2(√↑n−1+1−1)) = Λ m * ↑m^(2(√↑n−1+1−1))` (identical) — then `ring` isn't needed (rfl would close) — but field_simp left it unsolved, meaning NOT syntactically identical — the RHS probably has the exponent `2 * (√↑n - 1 + 1) - 2` or similar. `ring` fixes exponent arithmetic ✓. Add `ring`. 2. **Line 1262**: `⊢ False` — the four_ninths_rpow_sqrt_le's h2 — after the calc, `Real.exp_le_exp.mpr h2` — wait, the `⊢ False` means something derived a contradiction — the h2's calc step `_ ≤ -1.81316 := by norm_num` — norm_num evaluated `(−0.8109)·2.236 ≤ −1.81316` and found it FALSE?? — compute again: 0.8109·2.236 = ? 0.8109 × 2.236: 0.8109 × 2 = 1.6218; 0.8109 × 0.2 = 0.16218; 0.8109 × 0.036 = 0.0291924. Total: 1.6218+0.16218+0.0291924 = 1.8131724. So (−0.8109)·2.236 = −1.8131724. Target: −1.81316. Is −1.8131724 ≤ −1.81316? Since 1.8131724 > 1.81316, the negatives: −1.8131724 < −1.81316 ✓ TRUE. norm_num should accept... — unless norm_num computed (−0.8109)·2.236 differently: (−0.8109)·2.236 with 2.236 as a real literal — hmm — the h2b gave `Real.log (4/9)·2.236 ≤ (−0.8109)·2.236` — and the calc's step is `Real.log (4/9)·2.236 ≤ (−0.8109)·2.236`?? — no wait, the calc step after h2b is `_ ≤ -1.81316 := by norm_num` — the `_` is `(−0.8109)·2.236` — norm_num must show `(−0.8109)·2.236 ≤ −1.81316` — TRUE ✓. The `⊢ False` — hmm, maybe the h2a step has a type issue: h2a : `Real.log (4/9)·x ≤ Real.log (4/9)·2.236` via mul_le_mul_of_nonpos_left hx hlogneg.le — mul_le_mul_of_nonpos_left (h : b ≤ a) (hc : c ≤ 0) : c·a ≤ c·b — with a := x, b := 2.236, c := log(4/9): needs h : b ≤ a := 2.236 ≤ x = hx ✓ and hc := hlogneg.le ✓ — output `log(4/9)·x ≤ log(4/9)·2.236` ✓ should be fine... Hmm — "⊢ False" is what linarith/omega shows when it fails. norm_num wouldn't show ⊢ False for a simple inequality. Maybe the calc structure broke (the h2a/h2b types mismatched the calc steps, leaving the last norm_num with an unprovable False-ified goal from a previous `apply ... exact`?). Let me look at the actual 1262 region — the error is at 1262:94 — that's h2's calc's last line. Let me look at the lines.
Two clear issues: add `ring` after the `field_simp` in `e`, and checking the 1262 region.
tool: Edit
input
{
  "file_path": "D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean",
  "old_string": "      rw [show (2 * Real.sqrt (n : \u211d)) = (2 * Real.sqrt (n : \u211d) - 2) + 2 by ring,\n        Real.rpow_add hm2]\n      field_simp [hm2.ne']",
  "new_string": "      rw [show (2 * Real.sqrt (n : \u211d)) = (2 * Real.sqrt (n : \u211d) - 2) + 2 by ring,\n        Real.rpow_add hm2]\n      field_simp [hm2.ne']\n      ring"
}
tool: Read ok
input
{
  "file_path": "D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean",
  "offset": 1252,
  "limit": 30
}
result 2026-08-26 09:42:56Z → 2026-08-26 09:42:56Z
{
  "type": "text",
  "file": {
    "filePath": "D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean",
    "content": "  rw [h1]\n  have h2 : Real.log (4 / 9) * x \u2264 (-1.81316 : \u211d) := by\n    have h2a : Real.log (4 / 9) * x \u2264 Real.log (4 / 9) * 2.236 :=\n      mul_le_mul_of_nonpos_left hx hlogneg.le\n    have h2b : Real.log (4 / 9) * 2.236 \u2264 (-0.8109) * 2.236 :=\n      mul_le_mul_of_nonneg_right hlog49 (by norm_num)\n    calc Real.log (4 / 9) * x \u2264 Real.log (4 / 9) * 2.236 := h2a\n      _ \u2264 (-0.8109) * 2.236 := h2b\n      _ \u2264 -1.81316 := by norm_num\n  have h3 : Real.exp (-1.81316) \u2264 (0.164 : \u211d) := by\n    have hsum : (6.12639 : \u211d) \u2264 Real.exp 1.81316 := by\n      calc (6.12639 : \u211d) \u2264 \u2211 i \u2208 Finset.range 7, (1.81316 : \u211d) ^ i / (Nat.factorial i : \u211d) := by\n            norm_num [Finset.sum_range_succ]\n        _ \u2264 Real.exp 1.81316 :=\n            Real.sum_le_exp_of_nonneg (by norm_num : (0 : \u211d) \u2264 1.81316) 7\n    rw [show Real.exp (-1.81316) = 1 / Real.exp 1.81316 by\n      rw [Real.exp_neg, one_div]]\n    calc 1 / Real.exp 1.81316 \u2264 1 / 6.12639 :=\n        one_div_le_one_div_of_le (by norm_num : (0 : \u211d) < 6.12639) hsum\n      _ \u2264 0.164 := by norm_num\n  calc Real.exp (Real.log (4 / 9) * x) \u2264 Real.exp (-1.81316) :=\n        Real.exp_le_exp.mpr h2\n    _ \u2264 0.164 := h3\n\n/-- The 3^{\u2212(2\u221an\u22122)} = 9\u00b7(4/9)^{\u221an}\u00b72^{\u22122\u221an} identity. -/\nlemma three_pow_neg_two_sqrt_sub_two_eq {n : \u2115} :\n    (3 : \u211d) ^ (-(2 * Real.sqrt (n : \u211d) - 2)) =\n      9 * ((4 / 9 : \u211d) ^ Real.sqrt (n : \u211d)) * (2 : \u211d) ^ (-(2 * Real.sqrt (n : \u211d))) := by\n  have h9 : Real.log 9 = 2 * Real.log 3 := by\n    rw [show (9 : \u211d) = 3 ^ 2 by norm_num, Real.log_pow]",
    "numLines": 30,
    "startLine": 1252,
    "totalLines": 1367
  }
}
raw content_json (database row)
[{"type":"thinking","thinking":"Now I see:\n\n1. **Line 1118**: the goal is `Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1)) = Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1))`?? — the display shows `↑m ^ (2 * (√↑n - 1 + 1 - 1))` — the exponent after `rw [show (2·√↑n) = (2·√↑n−2)+2 by ring, Real.rpow_add hm2]` — my show rewrote `2·√↑n` as `(2·√↑n−2)+2` and then rpow_add — but the display shows `2 * (√↑n − 1 + 1 − 1)` — the field_simp normalized `(2·√↑n−2)+2` to `2·(√↑n−1+1−1)`?? — and the goal is `Λ m · ↑m^(that) = Λ m · ↑m^(that)` — IDENTICAL sides — should close by rfl!! \"unsolved goals\" with identical sides — means field_simp normalized but the final `ring` (I don't have one — my e proof is `rw [...]; field_simp [hm2.ne']` — field_simp left this identical-sides goal UNCLOSED). Add `ring` after field_simp... — or the sides differ subtly: LHS `Λ m * ↑m ^ (2 * (√↑n - 1 + 1 - 1))` and RHS — the display only shows the LHS (truncated at =). The full goal is probably `Λ m * ↑m^(2(√↑n−1+1−1)) = Λ m * ↑m^(2(√↑n−2))`?? — exponent arithmetic mismatch: field_simp didn't unify `2(√↑n−1+1−1)` with `2(√↑n−2)` — add `ring_nf` or `ring` — `ring` should close (exponent arithmetic is ring). Add `ring` after field_simp... but if field_simp closes, ring errors — here it did NOT close, so ring is needed:\n```\n      rw [show (2 * Real.sqrt (n : ℝ)) = (2 * Real.sqrt (n : ℝ) - 2) + 2 by ring,\n        Real.rpow_add hm2]\n      field_simp [hm2.ne']\n      ring\n```\nHmm — but the banked gotcha: trailing ring errors when field_simp closes. Here it demonstrably didn't close (identical-sides leftover with different exponent normal forms). Use `ring_nf` instead — ring_nf normalizes and closes if the normal forms match; if the goal was already closed by field_simp, ring_nf errors \"no goals\"... — gamble. The leftover shows NON-closed, so ring_nf is needed. But earlier similar spots used `field_simp; ring` and field_simp closed (the banked gotcha was the reverse). Use `ring` (the leftover is a ring identity: `Λ m · ↑m^(2(√↑n−1+1−1)) = Λ m · ↑m^(2(√↑n−2))` — ring proves exponent arithmetic `2(√↑n−1+1−1) = 2(√↑n−2)` ✓ and the rest is identical ✓).\n\nHmm wait — actually looking again at the displayed goal: `⊢ ArithmeticFunction.vonMangoldt m * ↑m ^ (2 * (√↑n - 1 + 1 - 1)) =` (truncated) — the sides might be `Λ m * ↑m^(2(√↑n−1+1−1)) = Λ m * ↑m^(2(√↑n−1+1−1))` (identical) — then `ring` isn't needed (rfl would close) — but field_simp left it unsolved, meaning NOT syntactically identical — the RHS probably has the exponent `2 * (√↑n - 1 + 1) - 2` or similar. `ring` fixes exponent arithmetic ✓. Add `ring`.\n\n2. **Line 1262**: `⊢ False` — the four_ninths_rpow_sqrt_le's h2 — after the calc, `Real.exp_le_exp.mpr h2` — wait, the `⊢ False` means something derived a contradiction — the h2's calc step `_ ≤ -1.81316 := by norm_num` — norm_num evaluated `(−0.8109)·2.236 ≤ −1.81316` and found it FALSE?? — compute again: 0.8109·2.236 = ?\n\n0.8109 × 2.236: 0.8109 × 2 = 1.6218; 0.8109 × 0.2 = 0.16218; 0.8109 × 0.036 = 0.0291924. Total: 1.6218+0.16218+0.0291924 = 1.8131724. So (−0.8109)·2.236 = −1.8131724. Target: −1.81316. Is −1.8131724 ≤ −1.81316? Since 1.8131724 > 1.81316, the negatives: −1.8131724 < −1.81316 ✓ TRUE. norm_num should accept... — unless norm_num computed (−0.8109)·2.236 differently: (−0.8109)·2.236 with 2.236 as a real literal — hmm — the h2b gave `Real.log (4/9)·2.236 ≤ (−0.8109)·2.236` — and the calc's step is `Real.log (4/9)·2.236 ≤ (−0.8109)·2.236`?? — no wait, the calc step after h2b is `_ ≤ -1.81316 := by norm_num` — the `_` is `(−0.8109)·2.236` — norm_num must show `(−0.8109)·2.236 ≤ −1.81316` — TRUE ✓. The `⊢ False` — hmm, maybe the h2a step has a type issue: h2a : `Real.log (4/9)·x ≤ Real.log (4/9)·2.236` via mul_le_mul_of_nonpos_left hx hlogneg.le — mul_le_mul_of_nonpos_left (h : b ≤ a) (hc : c ≤ 0) : c·a ≤ c·b — with a := x, b := 2.236, c := log(4/9): needs h : b ≤ a := 2.236 ≤ x = hx ✓ and hc := hlogneg.le ✓ — output `log(4/9)·x ≤ log(4/9)·2.236` ✓ should be fine...\n\nHmm — \"⊢ False\" is what linarith/omega shows when it fails. norm_num wouldn't show ⊢ False for a simple inequality. Maybe the calc structure broke (the h2a/h2b types mismatched the calc steps, leaving the last norm_num with an unprovable False-ified goal from a previous `apply ... exact`?). Let me look at the actual 1262 region — the error is at 1262:94 — that's h2's calc's last line. Let me look at the lines.","signature":""},{"type":"text","text":"Two clear issues: add `ring` after the `field_simp` in `e`, and checking the 1262 region."},{"type":"tool_use","id":"Edit_451","name":"Edit","input":{"file_path":"D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean","old_string":"      rw [show (2 * Real.sqrt (n : ℝ)) = (2 * Real.sqrt (n : ℝ) - 2) + 2 by ring,\n        Real.rpow_add hm2]\n      field_simp [hm2.ne']","new_string":"      rw [show (2 * Real.sqrt (n : ℝ)) = (2 * Real.sqrt (n : ℝ) - 2) + 2 by ring,\n        Real.rpow_add hm2]\n      field_simp [hm2.ne']\n      ring"},"extra_content":null},{"type":"tool_use","id":"Read_452","name":"Read","input":{"file_path":"D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiDogLeg.lean","offset":1252,"limit":30},"extra_content":null}]