代数几何中的 Chow 环成功涌现出相对论时空Chow Ring in Algebraic Geometry Successfully Gives Rise to Relativistic Spacetime
A local Lorentzian signature emerging from the intersection form of a Chow ring on a product of projective lines.
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20263
August2
常微分方程Ordinary Differential Equations
From algebraic equations to the essence and geometric meaning of ordinary differential equations.
June1
矩阵乘法、张量、向量的共通本质
矩阵乘法的本质是线性组合；矩阵乘法与张量积是同一个双线性结构的不同排布表现。