Sibt al-mardini

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Sibt al-Mardini, Muhammad ibn Muhammad ibn Ahmad ibn Muhammad ibn al-Ghazal (1423-1506 A.D.). He was born in Egypt. His father came from Damascus. The word "Sibt al-Mardini" means "the son of al-Mardini's daughter". His maternal grandfather, Abdullah al-Mardini, was a reputed astronomer of the eighth century AH.

Sibt al-Mardini is a Muslim astronomer and scholar who taught Mathematics and astronomy in the Great Mosque of al-Azhar, Cairo. He was also a timekeeper (muwaqqit) of the mosque. He wrote no less than 50 treatise in astronomy (sine quadrants, sundials, astronomical tables and prayer times and wrote at least 23 mathematics textbooks.

Al-Sakhawy counted two hundred books that were written by Sibt al-Mardini, on Islamic law, astronomy, and mathematics. Libraries that specialize in ancient manuscripts, all over the world, have transcripts of his works.

Sibt al-Mardini’s declared that “the opinion of the muezzins [those who call people to prayer] is less correct than that of the legal scholars and it is the latter that should be used as the basis for the determination of prayer time”

[edit] His works

  1. Sharh al-Rahbiyah a commentary on the work of al-Rahbi (d. 579 A.H./1183 A.D.) on Fara'id (shares of inheritance)
  2. Sharh al-Muqni' fi 'ilm al-Jabr wa al-Muqabalah (Commentary on al-Muqni' about the science of Calculation by Completion and Balancing). al-Muqni' is a work of Shihabuddin ibn Ahmad ibn al-Hayim.