3 Commits

Author SHA1 Message Date
Tarik Moussa
26f4f0637d docs: citation audit + correct 8 mis-citations; add Phases 12/13
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External reviewer pass over the literature references. Verified entries
against arXiv/DOI/publisher and corrected misattributions that had
propagated across the docs.

Corrected citations (consistent across all docs):
- Bowers-Bowers-Lutz 2026: title was the 2017 paper's
  -> "Rigidity of Koebe Polyhedra and Inversive Distance Circle Packings"
- Liouville theorem: "Springborn 2019" -> Pinkall & Springborn,
  Geom. Dedicata 214 (2021)
- Bobenko-Pinkall-Springborn: "G&T 14 (2010)" -> G&T 19(4) (2015), 2155-2215
- Optimal Cone Singularities: "Crane, Soliman, Ben-Chen, Schroeder"
  -> Soliman, Slepcev, Crane, ACM TOG 37(4)
- Schlaefli formula: "Rivin, Springborn 1999" -> Rivin, Schlenker
- Quasiconformal distortion: "Springborn, Veselov" -> Born, Buecking,
  Springborn (arXiv:1505.01341)
- Period matrices: "Bobenko, Buecking 2009" (was Bobenko-Mercat-Schmies'
  title) -> Bobenko-Mercat-Schmies 2011 + genuine Bobenko-Buecking 2021
- Fabricated entry: "Alexa 2020, DOI 10.1145/3414685.3417840" pointed to
  an unrelated paper (Pixelor) -> Bunge, Herholz, Kazhdan, Botsch 2020
- Stripe Patterns: "Bonneel et al. 2015" -> Knoeppel, Crane, Pinkall,
  Schroeder 2015

Equation-number corrections (verified against the PDFs):
- Glickenstein 2011 "eq. 4.6" -> "§5.2" (no such equation label exists)
- Springborn 2020 "eq. 4.6" -> "§4 variational gradient"
- inversive-distance attribution softened to classical inversive distance

Other:
- DBFEnergy bibliography (separate repo) and convergence half-sentence in
  novelty-statement.md §3.3 (Bobenko-Buecking 2021)
- Status legend (implemented vs planned) at top of references.md
- New Phase 12 (decorated DCE & geometric transition, Chain A, near-term)
  and Phase 13 (canonical tessellations & polyhedral realisation, Chain B
  capstone) in phases.md + research-track.md; 10c scope-boundary note
  clarifying infrastructure vs Lutz-specific algorithms

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-05-29 19:17:17 +02:00
Tarik Moussa
4f0a3035e4 docs: full audit — fix 4 wrong port/research labels + consolidated research-track
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A full audit of `doc/` plus root-level markdown files (27 files) against
the actual ground truth in the C++ code and the local Java repository at
`/Users/tarikmoussa/Desktop/conformallab/` revealed four pre-existing
mis-labels and a stale test count.  All are corrected here.

Audit findings — corrected
─────────────────────────

1. **`InversiveDistanceFunctional` mis-labelled as Java port** (4 doc sites)
   Empirical verification:
       find /Users/tarikmoussa/Desktop/conformallab -iname "*nversive*"
       (zero matches)
   The class does NOT exist in `de.varylab.discreteconformal`.  The C++
   implementation is built from Luo 2004 + Glickenstein 2011 + Bowers-
   Stephenson 2004 — new research, not a port.
   Fixed in: java-parity.md, references.md, add-inversive-distance.md.

2. **HyperIdeal Hessian mis-labelled as "Java has analytic Hessian"**
   Empirical verification: `HyperIdealFunctional.java:295-298`:
       public boolean hasHessian() { return false; }
   Java has NO Hessian at all.  Both the FD (Phase 4a) and the block-FD
   (Phase 9b) Hessians in C++ are research beyond the Java port.  The
   chain rule (b,a) → ℓ → ζ → α/β is the *mathematical formulation*
   from Springborn 2020, not something Java implements.
   Fixed in: java-parity.md.

3. **Stale test count** README:87 said "28 suites, 170 tests" — current
   actual is 35 suites, 176 CGAL + 36 non-CGAL.  Fixed.

4. **Tutorial framing** — `add-inversive-distance.md` was framed as
   "porting an InversiveDistanceFunctional.java" that does not exist.
   Rewritten as "Implementing the Inversive-Distance functional from
   Luo 2004" with prominent verification block at top.

New document: `doc/roadmap/research-track.md`
─────────────────────────────────────────────

Consolidates everything in conformallab++ that goes beyond a Java port:

* Items already on `main`: HyperIdeal FD Hessian, period matrix τ
  partial-research components, Möbius holonomy storage.
* Items on open PRs: CP-Euclidean (PR #8, port), Inversive-Distance
  (PR #8, research), block-FD Hessian (PR #9, research).
* Planned research with full citations:
  - **Phase 9b-analytic** — full analytic HyperIdeal Hessian via
    Schläfli identity (Schläfli 1858/60) and chain rule through
    ζ₁₃/ζ₁₄/ζ₁₅, citing Springborn 2020 §4, Cho-Kim 1999,
    Glickenstein 2011 §4.  Includes acceptance-criteria checklist
    (per-case derivative cross-checks, gauge null space, PSD,
    measured ≥ 3× speed-up, LaTeX correctness note).
  - **Phase 9a.2-analytic** — analytic inversive-distance Hessian
    via Glickenstein 2011 eq. (4.6).
  - **Phase 10c** — full uniformization for genus g ≥ 2 (Fuchsian
    group representation) — fully new research, no Java reference.
  - **geometry-central** GC-1/2/3 exploratory track.

* Java backlog summary: 11 worth-porting Java classes identified by
  the parallel survey (FundamentalPolygonUtility, DiscreteHarmonicForm-
  Utility, DiscreteHolomorphicFormUtility, CanonicalBasisUtility,
  HyperbolicCyclicFunctional, QuasiisothermicUtility, KoebePolyhedron, …).
  ~6 500 Java lines, ~5 months of porting work, organised by phase.

Updated documents
─────────────────

* CLAUDE.md
  - New "Port-vs-research maintenance rule" with empirical verification
    command and the four corrected mis-labels.
  - Doc map: 23 → 24 documents (research-track.md added).

* README.md
  - Test count corrected (170 → 176+36).

* doc/math/references.md
  - Luo 2004 entry corrected ("new research" instead of "not yet ported").
  - New entries for Bowers-Stephenson 2004, Glickenstein 2011,
    Bobenko-Pinkall-Springborn 2010, Schläfli 1858/60.

* doc/roadmap/phases.md
  - Phase 9 reorganised: 9a split into 9a.1 (port) / 9a.2 (research),
    9b clarified as research (Java has no Hessian), 9c expanded with
    Java line counts and effort estimates.
  - Phase 10 reorganised: 10a/10b/10c with their Java prerequisites
    explicitly listed; 10c flagged as "fully new research".
  - Phase 10b' added: parallel research track (hyperbolic functional,
    quasi-isothermic, Möbius centering).
  - Phase 10c' added: optional Java-port additions (Koebe, circle
    patterns, electrostatic sphere).

* doc/roadmap/java-parity.md
  - Inversive-distance row:  Java,  C++ (Phase 9a.2) — new research.
  - CP-Euclidean row added:  Java,  C++ (Phase 9a.1) — port.
  - HyperIdeal Hessian row:  Java, ⚠️ FD + block-FD in C++.
  - Worth-porting table replaced with the survey results (12 classes,
    Java line counts, suggested phases).
  - "HyperIdeal Hessian: FD vs analytic" section rewritten with the
    correction notice.

* doc/tutorials/add-inversive-distance.md
  - Rewritten end-to-end with prominent verification block at top.
  - Now correctly framed as "Implementing the Inversive-Distance
    functional from Luo 2004" — research, not port.
  - Includes the four required cross-validations:
    limit cases, Bowers-Stephenson round-trip, FD-vs-analytic,
    cross-validation against euclidean_functional at u=0.
  - New "How to know if it's a port or research" closing section
    with the empirical verification command.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-21 20:48:16 +02:00
Tarik Moussa
b235666725 docs: Doxygen-API + Validierungsprotokoll + Porting-Tutorial
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Für einen Mathematiker der unabhängig validieren und eigene Forschung
einbringen möchte.

Doxygen-Kommentare (code/include/):
  newton_solver.hpp — newton_euclidean(), newton_spherical(), newton_hyper_ideal()
    je mit \param, \return, \note, \see inkl. mathematischer Begründung
    (Konvexität, Vorzeichenkonvention, SparseQR-Fallback-Erklärung)
  layout.hpp — euclidean_layout(), spherical_layout(), hyper_ideal_layout()
    mit vollständiger Parameter-Doku, halfedge_uv-Semantik, Poincaré-Disk-Note

Neues Dokument:
  doc/math/validation-protocol.md
    7 reproduzierbare Checks mit konkreten Befehlen und erwartetem Output:
    0. 170 Tests, 1 Skip
    1. Gauss–Bonnet exakt (1e-10)
    2. FD-Gradientencheck < 1e-6 für alle 3 Geometrien
    3. Newton-Konvergenz < 50 Iterationen
    4. τ ∈ SL(2,ℤ)-Fundamentaldomäne (3 Invarianten)
    5. Möbius-Arithmetik (Inverse, Compose, from_three)
    6. End-to-End-Pipeline
    7. Manueller τ-Check für torus_4x4.off (Codebeispiel)

Neues Tutorial:
  doc/tutorials/add-inversive-distance.md
    Vollständiger Step-by-Step-Port von Phase 9a (Luo 2004):
    Header anlegen, Energie/Gradient implementieren, FD-Check,
    Newton-Wrapper, CMakeLists, Java-Referenzvergleich, Checkliste.

doc/getting-started.md:
  Abschnitt "Known issues": macOS-Finder-Duplikate (rm-Befehl),
  Warnung "First build 30–90s" (Tarball-Extraktion)

README.md:
  Zwei neue Links in der Dokumentationstabelle (validation-protocol,
  tutorial)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-18 01:19:44 +02:00