Ptolemy's Fixed Equant - Harvard University

Ptolemy's Fixed Equant - Harvard University

Dr Mustapha Kara-Ali International Islamic University Malaysia C O N S T R UC T I V I S M A C R O SS I S L A M O E U R O P E A N B O U N D A R I ES I N T H E F I F T EE N T H CE N T U RY:

T H E P H I L OS O P H I C A L T R A N S M I SS I ON O F T H E F OU N DAT I ON S OF QU S H J I S A S T R O N O M I C A L M O DE L S Topics

Programs in Astronomy: Realism, Instrumentalism and Constructivism Constructivism and the Philosophy of Mathematics

Ptolemys Fixed Equant: A Challenge for Realism The Qushji Compounder as a Solution to the Equant Problem The Philosophy of a Qushji Compounder

The Dynamic Construction of the Ellipse Qushjis Astronomical Models Conclusion: Philosophic Transmission and the Copernican Revolution

Qushji Compounder Refer to M. Kara-Ali, Constructivism at the birth of the scientific revolution, PhD Dissertation, IIUM, 2014. Qushjis Equant Model

`Urdi Solution to the Equant (Upper) `Urdi Solution to the Equant (1.5/20)

Refer to M. Kara-Ali, Constructivism at the birth of the scientific revolution, PhD Dissertation, IIUM, 2014. `Urdi Solution (7:20) Refer to M. Kara-Ali, Constructivism at the birth of the scientific revolution, PhD Dissertation, IIUM, 2014.

Qushjis Solution to the Equant Qushjis Solution to the Equant

Refer to M. Kara-Ali, Constructivism at the birth of the scientific revolution, PhD Dissertation, IIUM, 2014. Qushjis Proof: Eccentric Model (lower)

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