Lǐ Jí 李籍 (fl. Táng), Táng-period mathematician-and-philologist. Author of phonetic-and-meaning glosses (yīnyì 音義) on the foundational Chinese mathematical classics, including the Zhōubì suànjīng yīnyì 周髀算經音義 (KR3f0001’s appended 1 juan), the Jiǔzhāng suànshù yīnyì 九章算術音義, and others. Lǐ has no further transmitted biographical record.