User publication · Theory under investigation — record v1

Mathematical Sample v1 — The 8000–7000 BP Anchor

The postulate, the reasons it is plausible, and the math behind it — derived from scratch, with no borrowed number left unlabeled. It remains a theory: if it clashes with consensus, that is what the page is for. Let us debate.

Author: Juan Carlos Euyoque Aguilera · JCEA Labs September 26, 2026 CC BY 4.0 Root hash: f6c72bb1…f14dc0d

The thesis, in one sentence

Author's postulate: "my theory is that this has its maximum at 8000–7000 BP (6050–5050 BCE cal)". This sample derives the mathematical consequences of that anchor: the cycle beat, the exact phase recurrence, the maximum tables — and quantifies the clash with the cited standard, without deciding who is right.

Doctrine of this publication: mathematics is the judge. Everything derived is derived; everything cited is cited. What was found wrong is published in writing.

00 · Prior correction — flaw found in me

In the sealed longyou-v1 set I published "last obliquity maximum ~8700 BCE". That number was not derived from JCEA's model: it was imported from consensus and assumed to belong to his theory. That is building on half-understanding.

This sample corrects the procedure: no borrowed number goes unlabeled here. The sealed package is not touched; it stands recorded as superseded by this sample until a v2.

01 · BP ↔ calendar conversion — derivation

BP counts from 1950. For BCE years: BP = BCE + 1950.

ReferenceStatusValue
Postulate anchor[DERIVED]8000 BP → 8000 − 1950 = 6050 BCE ✓ (the author's conversion is correct)
Postulate anchor[DERIVED]7000 BP → 7000 − 1950 = 5050 BCE ✓
Cited standard[CITED]8700 BCE (obliquity maximum, Berger via literature) → 10,650 BP
Sky computed by Aura[CITED]8000 BCE → 9,950 BP

02 · Derivations — from first principles

Inputs (not derived here; standard Milankovitch-model values): obliquity period T₁ = 41,000 yr; axial precession period T₂ = 26,000 yr (25,772 yr for the shift calculation).

The 41k/26k beat (joint maxima)

Two oscillations peak together when their phases align. The coincidence frequency is |f₁ − f₂|:

|1/41,000 − 1/26,000| = 15,000 / 1,066,000,000 = 1.407129…×10⁻⁵ yr⁻¹

T_beat = 1 / 1.407129…×10⁻⁵ = 71,066.67 yr ≈ 71,067 yr.

Exact phase recurrence (LCM)

41,000 = 41 × 2³ × 5³; 26,000 = 2⁴ × 5³ × 13. GCD = 2³ × 5³ = 1,000.

LCM = 41,000 × 26,000 / 1,000 = 1,066,000 yr.

Mathematical sample chart: the 8000–7000 BP anchor, the 71,067-year beat and the 1,066,000-year LCM.
The 8000–7000 BP anchor, the 41k/26k beat and phase recurrence. Own derivation — mathvsmyth.com | By JCEA.

Postulate-anchored maxima

If the last maximum was 8000–7000 years ago, the maxima fall at:

CyclePeriodPrevious maximumPostulated maximumNext maximum
Obliquity41,000 yr49,000–48,000 BP8000–7000 BP33,000–34,000 AP
Combined (beat)71,067 yr79,067–78,067 BP8000–7000 BP63,067–64,067 AP

Obliquity minima (half period, 20,500 yr): 28,500–27,500 BP and within 12,500–13,500 AP.

"One maximum to the next" window under the postulate: obliquity 49,000–48,000 BP → 8000–7000 BP (≈ 47,050–46,050 BCE → 6050–5050 BCE); combined 79,067–78,067 BP → 8000–7000 BP.

The 8000 BCE sky is not the maximum's sky

Precession rate: 360° / 25,772 yr = 0.0139683°/yr. Δt = 9,950 − 8,000 = 1,950 yr → 27.24°; Δt = 9,950 − 7,000 = 2,950 yr → 41.21°.

The sky computed at 8000 BCE is 27–41° of precession (≈ 2–3 millennia) away from the postulated maximum. It is not the maximum's sky.

03 · The clash, quantified — debate agenda, not refutation

PositionStatusLast maximum
Cited standard (Berger, via literature)[CITED]8700 BCE = 10,650 BP (obliquity)
JCEA postulate[DERIVED]8000–7000 BP = 6050–5050 BCE

Δ = 2,650–3,650 years. There is the debate. This sample's math does not decide who is right; it puts the number on the table.

04 · Flaws found — audit

  • F1. longyou-v1 (imgs 6–7: "~8700 BCE" and the 50,000–8,000 BCE window): numbers not derived from the model; 8700 BCE contradicts the postulate. Sealed package untouched; superseded by this sample until v2.
  • F2. I mapped "maximum point" → standard obliquity maximum with no basis. This sample separates obliquity (41k) from the combined cycle (71,067 yr) with the postulate as the only anchor.
  • F3. The 50,000–8,000 BCE window: under the postulate, one obliquity cycle back falls at 49,000–48,000 BP (≈ 47,050–46,050 BCE), not 50,000 BCE. It must be recomputed.
  • F4. Aura's 8000 BCE sky uses simplified precession (~1°/century vs the real 1.397°/century) and is 27–41° away from the postulated maximum.
  • F5. Pending definition: what exact physical quantity "this" is in the model (obliquity, combined cycle, other?). This sample derives consequences of the postulate without assuming it.

05 · Author's note — sea level — plausibility, not dating

The author notes that sea level at 8000–7000 BP makes his anchor plausible. Verification: at 8000 BP the sea stood ~13–17 m below present and at 7000 BP ~7 m below, rising at 8–10 mm/yr before 8000 BP (Sivan et al., eastern Mediterranean; Bohai, China: −17.19±1.32 m → +1.76±1.32 m between 9000 and 7000 cal BP). The great post-glacial rise (~60 m) ends ~7000 cal BP (Smith et al. 2011, Quaternary Science Reviews).

Observation (not proof): the postulate's young edge (7000 BP) coincides with the end of the early Holocene transgression. The postulated maximum falls within the last phase of a planet with moving coastlines and shifting geography — a different world from today's. This does not date the carvings; it is plausibility context for the epoch.

06 · What settles it

  1. Independent orbital computation of the Holocene maximum (implement the series and verify against anchors: J2000, 6 ka).
  2. Physical dating of the carvings (OSL / radiocarbon / microerosion).
  3. 3D survey of the portal (azimuth, horizon, panel position).

Whoever comes with math is welcome. Whoever comes to knock it down without math — bring your own.

Provenance — Origin Method

Layer 1 · Manifest: the muestra-8000bp-v1 package (document, chart and generator) is sealed with root hash f6c72bb12fd153741ae525b29840bd50cc9bf21746bc6db1fa2b81f9df14dc0d — September 26, 2026, CC BY 4.0.

Layer 3 · Bitcoin seal: pending — the calendars did not respond (0 attestations); said out loud and retried daily. Nothing is claimed sealed that is not.

Layer 4 · Public witness: this page.

07 · Sources

  1. Berger (1978) — reference orbital solution (obliquity, precession, eccentricity); "8700 BCE" is cited via literature, not derived here.
  2. Sivan et al. — eastern Mediterranean sea level: −13.5±2 m (model) / −16.5±1 m (archaeological) at 8000 BP; ~−7 m at 7000 BP.
  3. Smith et al. (2011) — Quaternary Science Reviews: the ~60 m post-glacial rise ends ~7000 cal BP.
  4. Bohai, China — relative sea level −17.19±1.32 m → +1.76±1.32 m between 9000 and 7000 cal BP; 8–10 mm/yr rate before 8000 BP.

Theory and derivation by Juan Carlos Euyoque Aguilera (JCEA). Sample v1 sealed September 26, 2026. Creative Commons Attribution 4.0 license. Theory under investigation: what is derived is derived, what is cited is cited.