Jiǎ Hēng 賈亨
An early-Míng mathematician active in the closing years of the 14th and early 15th centuries; fl. c. 1373. Birth and death years not securely recorded. CBDB id 109974 confirms the name and dynasty but supplies no dates.
His sole surviving work is the Suànfǎ quánnéng jí 算法全能集 (KR3fc022) in 3 juàn — a practical-mathematical compendium drawn together from YuánMíng materials, oriented toward abacus computation. The work belongs to the same intellectual lineage as the KR3fc013 Dīng Jù suànfǎ and KR3fc014 Xiángmíng suànfǎ, and is one of the key transitional documents between the Yuán practical-arithmetic primers and the mature Míng abacus-arithmetic tradition that would culminate in 程大位 Chéng Dàwèi’s KR3fc027 Suànfǎ tǒngzōng (1592).