Changelog

0.1.0 (2026-11-12)

  • Euler (1765/1767, E325) 4-Track Bilingual Book Codex (docsrc/euler_1765/): Verbatim 1767 St. Petersburg Latin, original GEOMETOR English translation, mathematical summaries, and critical apparatus across §§ 1–34, documenting authentic 1767 printing errata on pp. 106 and 109.

  • Feuerbach (1822) 4-Track Bilingual Book Codex (docsrc/feuerbach_1822/): Verbatim 1822 Nuremberg German, original GEOMETOR English translation, summaries, and critical apparatus covering Buzengeiger’s Vorrede (pp. III–XVI), the analytical-trigonometric treatise (§§ 1–87, culminating in § 57 Feuerbach’s Theorem), and the pure Euclidean synthetic Anhang (1.–9. Satz, pp. 56–62), including critical proof of the corrected § 51 / § 52 / § 60 orthocenter-excenter identities.

  • Exact Symbolic ``geometor.feuerbach`` Package: 30 exact rational-function polynomial proofs in SymPy, Euler’s inverse cubic solver on (5, 6, 7) and (15, 13, 14), @proposition compass-and-straightedge Model(..., auto_intersect=False) constructions of X(1)..X(5), X(11) = (6, 8), and Fea, Feb, Fec, plus four interactive .euclid-graphic SVGs and cross-corpus JSON concordance.