Commit 50c16f5a authored by Claude Meny's avatar Claude Meny

Update textbook.en.md

parent 95cb35c0
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......@@ -187,21 +187,24 @@ FR : système de coordonnées cartésiennes <br>
EN : Cartesian coordinate system
$`\nabla = \vec{e_x}\,\dfrac{\partial}{\partial x}+\vec{e_y}\,\dfrac{\partial}{\partial y}
+\vec{e_z}\,\dfrac{\partial}{\partial z} `$ <br>
+\vec{e_z}\,\dfrac{\partial}{\partial z} `$
, or
$`\nabla = \overrightarrow{e_x}\,\dfrac{\partial}{\partial x}+\overrightarrow{e_y}\,\dfrac{\partial}{\partial y}
+\overrightarrow{e_z}\,\dfrac{\partial}{\partial z} `$ <br>
ES : operador nabla <br>
FR : opérateur nabla <br>
EN : nabla operator
$`\overrightarrow{grad}\;f=\nabla\;f`$, $`\overrightarrow{\nabla}\;f``$ better, no? <br>
$`\overrightarrow{grad}\;f=\nabla\;f`$, $`\overrightarrow{\nabla}\;f`$ better, no? <br>
ES : gradiente <br>
FR : gradient <br>
EN : gradient
$`div \vec{U}= \nabla \cdot \vec{U}`$ , $`div \vec{U}= \vec{\nabla} \cdot \vec{U}`$ <br>
$`div\;\vec{U}= \nabla \cdot \vec{U}`$ , $`div\;\vec{U}= \vec{\nabla} \cdot \vec{U}`$ <br>
ES : divergencia <br>
FR : divergence <br>
EN : divergence <br>
$div \vec{U} = \lim_{V \to 0} \; \dfarc{1}{V} \; \oiint_{S\leftrightarrow V} \vec{U} \cdot \vec{dS}`$
$`div\;\vec{U}=\lim_{V\leftrightarrow0}\;\dfrac{1}{V}\;\oiint_{S\leftrightarrow V}\vec{U}\cdot\vec{dS}`$
ES : escalar = número real o complexo + unidad de medida? <br>
FR : scalaire = nombre réel ou complexe + unité de mesure <br>
......
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