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arXiv physics/0411154physics.flu-dynphysics.gen-ph
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关于流体力学的不变式

On the invariant formulation of fluid mechanics

S. Piekarski

摘要:

可以观察到,流体力学的微分算子可以用有限维仿射空间上的全导数来定义。它遵循的事实是,所有规范的有限维向量空间是等价的,并从定义的完全衍生物的赋范仿射空间(见:L.施瓦茨,分析数学,赫尔曼,1967年)。特别地,它表明了标准公式的“实质导数”是沿“非相对论四速”的方向导数。

英文摘要:

It can be observed that the differential operators of fluid mechanics can be defined in terms of the complete derivative on the finite - dimensional affine space. It follows from the fact that all norms on the finite - dimensional vector space are equivalent and from the definition of the complete derivative on the normed affine spaces (see: L.Schwartz, Analyse Mathematique, Hermann, 1967). In particular, it is shown that the "substantial derivative" of the standard formulation is a directional derivative along the "non - relativistic four - velocity".

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