别名:generalized coordinates
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Szekeres · source-snapshot-bc3404156f6e
已登记出处中的最早位置:§16.5 · zh-CN。
来源短摘录与定位
§16.5 · zh-CN · translation · unreviewed
称为该约束系统的自由度数目。坐标通常称为该约束系统的广义坐标(generalized coordinate)。它们甚至可用于无约束系统,此时且是的开子流形;在这种情况下,我们本质上是用一般坐标表示原来的牛顿动力系统。始终假定是的嵌入子流形,从而切映射处处为单射。这意味着矩阵处处具有秩(无临界点)。
§16.5 · en · original_transcription · unreviewed
and is called the number of degrees offreedom of the constrained system. The coordinates are commonly called generalized coordinates for the constrained system. They may be used even for an unconstrained system, in which and is an open submanifold of ; in this case we are essentially expressing the original Newtonian dynamical system in terms of general coordinates. It will always be assumed that is an embedded submanifold of , so that the tangent map is injective everywhere. This implies that the matrix has rank everywhere (no critical points).