Bibliography & Primary Sources

Critical register of primary editions, translations, ancient mathematical authorities cited by Proclus, and modern GEOMETOR companion treatises. Every :cite: reference in the Codex resolves directly to its entry below.

Primary Editions & Translations of Proclus

Franciscus Barocius (Francesco Barozzi) — Procli Diadochi Lycii in primum Euclidis Elementorum librum commentariorum ad universam mathematicam disciplinam principium eruditionis tradentium libri IIII (Padua: Gratiosus Perchacinus, 1560) [1560]

Key: barocius:1560 Renaissance Latin translation collated from superior Greek manuscripts in Venice and Crete, supplying crucial lacunae of the 1533 Basel Greek text.

Proclus Diadochus (ed. Gottfried Friedlein) — Procli Diadochi in primum Euclidis Elementorum librum commentarii (Leipzig: B. G. Teubner, 1873) [1873]

Key: friedlein:1873 Standard critical Teubner Greek edition (pp. 1–436, Indices pp. 437–507; CTS URN urn:cts:greekLit:tlg4036.tlg011.opp-grc1) providing canonical page-and-line numbering. Provenance: https://archive.org/details/friedlein-procli-diadochi-in-primum-euclidis-elementorum-librum-commentarii-gr-1873

Simon Grynaeus (ed.) — Εὐκλείδου Στοιχείων βιβλ. ιε΄ … Procli in primum Euclidis Elementorum librum commentariorum libri IIII (Editio Princeps) (Basel: Johann Herwagen, 1533) [1533]

Key: grynaeus:1533 Editio princeps of the Greek text of Euclid and Proclus’s Commentary, whose pagination appears in the left margin of Friedlein and was used by Thomas Taylor.

Thomas Taylor (trans.) — The Philosophical and Mathematical Commentaries of Proclus, on the First Book of Euclid’s Elements, Vol. I (London, 1788 / 1792 (Project Gutenberg #74253)) [1788/1792]

Key: taylor:1788 First English translation, Volume I covering Prologue Book I, Prologue Book II, and Definitions. Provenance: https://www.gutenberg.org/ebooks/74253

Thomas Taylor (trans.) — The Philosophical and Mathematical Commentaries of Proclus, on the First Book of Euclid’s Elements, Vol. II (London, 1789 / 1792 (Project Gutenberg #79455)) [1789/1792]

Key: taylor:1789 First English translation, Volume II covering Petitions/Postulates, Axioms, and Propositions I.1–I.48. Provenance: https://www.gutenberg.org/ebooks/79455

Ancient Philosophical & Mathematical Sources Cited by Proclus

Aristotle — Posterior Analytics (I.1–2, I.4–5, I.10 (71a–77a)) [c. 335 BC]

Key: aristotle:anal-post:I.1-10 Theory of apodictic science, first principles (axioms, hypotheses, postulates), and universal commensurately-first (katholou proton) demonstration (Friedlein 75–76, 178–183, 206, 381–383).

Aristotle — De Anima (I.4 (409a4), III.4–8 (429a–432a)) [c. 330 BC]

Key: aristotle:de-anima:III.4-8 Motion of a point generating a line (97), soul as ‘place of forms’ (topos eidon, 16), and passive intellect / phantasia (51–52).

Aristotle — De Caelo (I.5, 271b28–30) [c. 335 BC]

Key: aristotle:de-caelo:I.5 Lemma invoked by Proclus (Friedlein 371, 10) in his attempted proof of Postulate 5: two straight lines diverging from one point separate beyond any finite distance.

Aristotle — Metaphysics (A.1 (981b20), B.2 (997b35), M.3 (1078a)) [c. 330 BC]

Key: aristotle:met:981b-1078a Egyptian leisure of the priestly caste (64–65), Protagoras’s critique of geometric tangency (139–140), intelligible matter (hyle noete, 48–53), and mathematical beauty (26–27).

Claudius Ptolemy — That Straight Lines Produced from Angles Less Than Two Right Angles Meet (fragments) (apud Proclum, Friedlein 191, 362–368) [2nd cent. AD]

Key: ptolemy:parallel-lines Lost monograph attempting to demonstrate Euclid’s Fifth Postulate; preserved solely in Proclus’s Commentary on Prop. I.29.

Euclid — Elements (Στοιχεῖα), Book I (Defs. 1–23, Posts. 1–5, CN 1–5, Props. I.1–I.48) [c. 300 BC]

Key: euclid:elements The canonical treatise expounded throughout Proclus’s Commentary; cross-linked via GEOMETOR :just: to geometor/euclid and geometor/elements.

Eudemus of Rhodes — History of Geometry (Γεωμετρικὴ Ἱστορία, fragments) (apud Proclum, Friedlein 64–70, 125, 157, 250, 299, 333, 352, 379, 419) [c. 320 BC]

Key: eudemus:history-of-geometry Lost Peripatetic history of Greek geometry whose priceless fragments—the Eudemian Summary and attributions to Thales, Oenopides, Hippocrates, and the Pythagoreans—survive almost solely through Proclus.

Geminus of Rhodes — Theory of the Mathematical Sciences / Philokalia (fragments) (apud Proclum, Friedlein 38–42, 105, 111, 126, 176–177, 181–192, 241, 251) [1st cent. BC]

Key: geminus:philokalia Encyclopedic Stoic-mathematical treatise on the classification of sciences, curves (homoeomeric, spiric, cissoid, conchoid), asymptotic lines, and postulates.

Pappus of Alexandria — Mathematical Collection & Commentary on Euclid (apud Proclum, Friedlein 189, 197, 249–250) [c. 320 AD]

Key: pappus:collectio Source of the famous zero-construction symmetry proof of Prop. I.5 (pons asinorum) and critical notes on Postulate 4 and the Common Notions.

Plato — Meno (81e–85d) [c. 385 BC]

Key: plato:meno:81e-85d Recollection (anamnesis) demonstrated by Socrates eliciting the doubling of the square from an untaught boy, proving mathematical logoi are innate in the soul (Friedlein 45).

Plato — Parmenides (137e) [c. 370 BC]

Key: plato:parmenides:137e Plato’s optical definition of the straight line as ‘that of which the middle covers both extremities’ (Friedlein 109–110).

Plato — Philebus (16c–26d) [c. 355 BC]

Key: plato:philebus:16c-26d Metaphysics of Limit (peras) and the Unlimited (apeiron) as cosmic principles generating all mathematical harmony and figure (Friedlein 5–7).

Plato — Republic (VI, 509d–511e (The Divided Line)) [c. 375 BC]

Key: plato:rep:VI.510b-511d Foundational Platonic text establishing dianoia and mathematical objects as intermediate (metaxy) between sensibles and pure intelligibles (Friedlein 3–4, 10, 42).

Plato — Republic (VII, 525a–534e (Curriculum of the Quadrivium & Dialectic)) [c. 375 BC]

Key: plato:rep:VII.525a-534e Mathematics as the ‘prelude’ awakening the eye of the soul and Dialectic as the ‘coping-stone’ (thrigkos) of the sciences (Friedlein 20–29, 42–44).

Plato — Timaeus (31c–36d, 53c–56c) [c. 360 BC]

Key: plato:timaeus:31c-36d Harmonic composition of the World-Soul and construction of the five regular cosmic polyhedra—identified by Proclus as the ultimate skopos of Euclid’s Elements (Friedlein 16, 62, 70–71).

Companion GEOMETOR & Modern Critical Works

Petrus H. J. Hoenen, S.J. — De Noetica Geometriae: Origine Theoriae Cognitionis (Rome: Analecta Gregoriana Vol. 63, 1954 (geometor/hoenen)) [1954]

Key: hoenen:1954 Companion GEOMETOR treatise engaging Proclus on sensible inexactitude, phantasia and intelligible matter (Friedlein 12, 49, 97, 139–140, 185), and the epistemology of Postulate 5 (Friedlein 191, 365–373).

Sir Thomas Little Heath — The Thirteen Books of Euclid’s Elements (2nd ed., 3 vols.) (Cambridge University Press, 1926 (geometor/euclid)) [1926]

Key: heath:1926 Primary modern critical commentary on Euclid in geometor/euclid, citing Proclus across 156 distinct Friedlein loci.