For example, the three chapters of the History of the Three Kingdoms are: Algebra: Zhuge Liang (borrowing an arrow from a straw boat, "taking it back")

Geometry: Cao Cao (Heng Yun poem "Singing to Wine, Geometry of Life")

Triangle: the story of Dixin (the story of Situ Xian, Dong Zhuo, Lu Bu and Dixin, the triangle relationship)

I don't know what is in the official history, but I don't think it is mentioned.