# Pythagoras/Related Articles

From Citizendium, the Citizens' Compendium

*See also changes related to Pythagoras, or pages that link to Pythagoras or to this page or whose text contains "Pythagoras".*

## Parent topics

- Pre-Socratic philosophy [r]: Early Greek philosophers who researched and theorised about natural philosophy and cosmology.
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## Subtopics

- Pythagorean comma [r]: a microtonal musical interval, named after the Greek mathematician Pythagoras.
^{[e]} - Pythagorean cup [r]:
*Add brief definition or description* - Pythagorean theorem [r]: In a right triangle, the squared length of the side opposite the right angle is equal to the sum of the squared lengths of the two other sides.
^{[e]} - Lute of Pythagoras [r]:
*Add brief definition or description* - Pythagoras tree [r]:
*Add brief definition or description*

- Number [r]: One of the fundamental concepts of mathematics, used for such purposes as counting, ordering, and measuring.
^{[e]} - Sacred geometry [r]:
*Add brief definition or description* - Thales [r]: (fl. 6th century B.C.) Greek philosopoher sometimes considered the founder of modern philosophy and astronomy; important chiefly because he sought for a natural explanation of phenomena rather than a mythical or religious explanation.
^{[e]} - Anaximander [r]: (fl. early 6th c. BC) A Greek philosopher who held that the primary principal of the world consisted of a boundless, non-material entity which underlay the world and its various changes.
^{[e]} - Anaximenes [r]: (6th c. BC) Greek philosopher who sought to explain the phenomena of the universe in terms of the various manifestations of a single element and thus became the first to attempt to explain qualitative differences in terms of quantitative ones.
^{[e]} - Heraclitus [r]:
*Add brief definition or description* - Parmenides [r]:
*Add brief definition or description* - Zeno of Elea [r]:
*Add brief definition or description* - Empedocles [r]:
*Add brief definition or description* - Anaxagoras [r]:
*Add brief definition or description* - Ancient Atomists [r]:
*Add brief definition or description* - Leucippus [r]:
*Add brief definition or description* - Democritus [r]: (c. 494 - c. 404 BC) Greek natural philosopher who promulgated the atomic theory, which asserted that the universe is composed of two elements: the atoms and the void in which they exist and move.
^{[e]} - Hippasus [r]:
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