Assertion: couple | /r/ObjectUse | used as substitute
Facets:
value: for the equant
type: TRANSITIVE-OBJECT
value: extensively
type: DEGREE
Source sentences:
text: The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti (Commentary on the Almagest) as a solution for the latitudinal motion of the inferior planets, and later used extensively as a substitute for the equant introduced over a thousand years earlier in Ptolemy's Almagest.