Abū Manṣūr ʿAbd al-Qāhir ibn Ṭāhir bin Muḥammad bin ʿAbd Allāh al-Tamīmī al-Shāfiʿī al-Baghdādī;
(Arabic: أبو منصور عبدالقاهر ابن طاهر بن محمد بن عبدالله التميمي الشافعي البغدادي) was an Arab Shafi’i scholar, Usul Imam, heresiologist and mathematician.
‘Abd al-Qahir al-Baghdadi was born and raised in Baghdad. He was a member of the Arab tribe of Banu Tamim. He received his education in Nishabur and subsequently taught 17 subjects, including law, usul, arithmetic, law of inheritance and theology. Most of the scholars of Khurasan were his pupils. Ibn ‘Asakir writes that Abu Mansur met the companions of the companions of Imam al-Ashari and acquired knowledge from them.