内容 物体运动的引理 · 09
Motte 1729 · reading base
Moments are not modern differentials, but they prepare the same local comparison habit.
“矩”不是现代微分,但它训练的是同一种局部比较习惯。
命题
Lemma 8 · moments and small increments gives a geometric way to compare quantities at the edge of vanishing.
引理 8 · 矩与小增量 给出一种几何方法,用来比较即将消失的量。
读法检查 worked example
题
Let a line receive a tiny increment and ask which products are first-order.
让一条线段增加一个很小的量,问哪些乘积是一阶效应。
解
The first-order part carries the useful comparison; higher-order pieces vanish in the limiting argument.
一阶部分承担有效比较,高阶小量在极限论证里退场。
互链 context
与阿基米德穷竭法 archimedes-selections/overview、极限思想史 math-meta/topic-limit-history、微积分发明史 math-meta/topic-calculus-invention、柯西严格化 cauchy-cours/overview 和牛顿代数面 newton-arithmetica/overview 对读。
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