Concept
Theodorus of Cyrene
Overview
Theodorus of Cyrene (Ancient Greek: Θεόδωρος ὁ Κυρηναῖος, romanized: Theódōros ho Kyrēnaîos; fl. c. 450 BC) was an ancient Greek mathematician. The only first-hand accounts of him that survive are in three of Plato's dialogues: the Theaetetus, the Sophist, and the Statesman. In the first dialogue, he posits a mathematical construction now known as the Spiral of Theodorus.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
Possible passages
Found by search and not yet checked by a person; they may only mention the idea in passing.
He split the whole of this composition, then, along its entire length into two parts, joining them mutually across like the letter X, afterwards bending them into a circle, and connecting them both with themselves and each other, in such a way that their extremities might meet directly opposite the point of their mutual intersection, externally comprehending them in an uniform motion around the same centre; besides…
Plato, The works of Plato
The author is tied to Theodorus of Cyrene in the knowledge graph.
As, for example, to solve the problem, so often required in constructing geometrical figures, given the two extreme, to find the two mean lines of a proportion, both these mathematicians had recourse to the aid of instruments, adapting to their purpose certain curves and sections of lines. But what with Plato's indignation at it, and his invectives against it as the mere corruption and annihilation of the one good…
Plutarch, Plutarch
The author is tied to Theodorus of Cyrene in the knowledge graph.
THEODORUS: Theaetetus will not be angry, for he is very good-natured. But tell me, Socrates, in heaven's name, is this, after all, not the truth?
Plato, Theaetetus
The author is tied to Theodorus of Cyrene in the knowledge graph.
Philosophers who discussed Theodorus of Cyrene
Related ideas
- Athens
- Integer
- Plato
- Protagoras
- Euclid's Elements
- Plutarch
- Thirty Tyrants
- Logical consequence
- Statesman (dialogue)
- Sophist
- Theaetetus (dialogue)
- Sophist (dialogue)
- Alcibiades
- Ancient Greece
- Delphi
- Diogenes Laertius
- Cyrene, Libya
- Philip J. Davis
Place in the tradition
Part of Pythagoreanism.