从动能到广义动量：经典力学中的对偶关系From Kinetic Energy to Generalized Momentum: Duality in Classical Mechanics
从动能的变分出发，推导广义动量，讨论坐标度量与 Legendre 对偶。
Beauty is thesplendour of truth.
This is D.797's personal home. It will slowly gather notes on physics, code, interfaces, and the act of thinking itself. There is no fixed schedule and no attempt to explain everything. Think of it as an open sheet of paper: finished thoughts are written down, and unfinished ones are allowed to keep their space. Start with the Notes, or browse the Archive by date. Code and other projects live on GitHub.
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.
常微分方程Ordinary Differential Equations
From algebraic equations to the essence and geometric meaning of ordinary differential equations.