https://www.iemoji.com/view/unicode-character/37039/arabic-mathematical-operator-hah-with-dal
ARABIC MATHEMATICAL OPERATOR HAH WITH DAL Unicode Character - U+1EEF1
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https://www.ms.u-tokyo.ac.jp/seminar/operalge_e/past_e_19.html
Operator Algebra Seminars | Graduate School of Mathematical Sciences, The University of Tokyo
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