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Family: simultaneous-pell — Simultaneous Pell equations - #39

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Family: simultaneous-pell — Simultaneous Pell equations#39
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@roed-math roed-math commented Aug 8, 2026

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One family: Simultaneous Pell equations (simultaneous-pell) — P2, effective.

  • Standard form: x^2 - a*z^2 = 1, y^2 - b*z^2 = 1
  • Parent: pell-like

Contents: the registry entry and its docs/FAMILIES.md section.

References cited (the claim each one supports):

  • Anglin1996 — practical algorithm for simultaneous Pell systems
  • Bennett1998 — sharp bound (at most three) on the number of solutions

Independent of every other family PR: it needs only the registry backbone it is based on.

Part of the series that splits #1 into reviewable pieces:

  1. 01-bibliography — packaging, docs, annotated bibliography
  2. 02-parsing — equation strings to a term model
  3. 03-registry — the YAML family registry (3 seed families)
  4. 04-matchers — shape recognizers
  5. 05-classify — the classification pipeline
  6. 06-solvers — solver framework, two seed solvers, and the CLI
  7. 07..09-backbone — the 23 parent families of the DAG, by depth
  8. one PR per remaining family (38 of them, mutually independent)
  9. 99-polish — restore the full doctests and tighten the invariants

@roed-math roed-math mentioned this pull request Aug 8, 2026
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roed-math force-pushed the family/simultaneous-pell branch from eafda09 to 0362d55 Compare August 8, 2026 15:29
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roed-math force-pushed the split/09-backbone-deep branch from 082df89 to 35fcb63 Compare August 8, 2026 16:12
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roed-math force-pushed the family/simultaneous-pell branch from 0362d55 to 1198f39 Compare August 8, 2026 16:13
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roed-math force-pushed the split/09-backbone-deep branch from 35fcb63 to ece9c70 Compare August 9, 2026 02:43
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roed-math force-pushed the family/simultaneous-pell branch from 1198f39 to d4cabdc Compare August 9, 2026 02:43
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roed-math force-pushed the split/09-backbone-deep branch from ece9c70 to 6175904 Compare August 9, 2026 05:01
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roed-math force-pushed the family/simultaneous-pell branch from d4cabdc to e67ce7c Compare August 9, 2026 05:02
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roed-math force-pushed the split/09-backbone-deep branch from 6175904 to 529528f Compare August 9, 2026 05:21
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roed-math force-pushed the family/simultaneous-pell branch from e67ce7c to 94a3ec6 Compare August 9, 2026 05:21
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roed-math force-pushed the split/09-backbone-deep branch from 529528f to 8c5cfc8 Compare August 9, 2026 08:24
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roed-math force-pushed the family/simultaneous-pell branch from 94a3ec6 to bd6618a Compare August 9, 2026 08:24
One family: **Simultaneous Pell equations** (`simultaneous-pell`) — P2, effective.

- Standard form: `x^2 - a*z^2 = 1, y^2 - b*z^2 = 1`
- Parent: `pell-like`

Contents: the registry entry and its `docs/FAMILIES.md` section.

References cited (the claim each one supports):

- `Anglin1996` — practical algorithm for simultaneous Pell systems
- `Bennett1998` — sharp bound (at most three) on the number of solutions

Independent of every other family PR: it needs only the registry backbone it is based on.

Part of the series that splits #1 into reviewable pieces:

1. `01-bibliography` — packaging, docs, annotated bibliography
2. `02-parsing` — equation strings to a term model
3. `03-registry` — the YAML family registry (3 seed families)
4. `04-matchers` — shape recognizers
5. `05-classify` — the classification pipeline
6. `06-solvers` — solver framework, two seed solvers, and the CLI
7. `07..09-backbone` — the 23 parent families of the DAG, by depth
8. one PR per remaining family (38 of them, mutually independent)
9. `99-polish` — restore the full doctests and tighten the invariants
@roed-math
roed-math force-pushed the split/09-backbone-deep branch from 8c5cfc8 to d767c69 Compare August 9, 2026 20:35
@roed-math
roed-math force-pushed the family/simultaneous-pell branch from bd6618a to df98c67 Compare August 9, 2026 20:36
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