Update 2022-02-14 06:33
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<!-- 2022-02-10 Thu 08:32 -->
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<!-- 2022-02-13 Sun 21:20 -->
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Pre-Quantum Electrodynamics</title>
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@@ -1599,9 +1599,9 @@ Table of contents
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<div class="outline-text-5" id="text-c_m_dc_d2">
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</div>
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<div id="outline-container-orgd5309ec" class="outline-6">
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<h6 id="orgd5309ec"><a href="#orgd5309ec">Divergence of gradient</a></h6>
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<div class="outline-text-6" id="text-orgd5309ec">
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<div id="outline-container-orgbe5f73d" class="outline-6">
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<h6 id="orgbe5f73d"><a href="#orgbe5f73d">Divergence of gradient</a></h6>
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<div class="outline-text-6" id="text-orgbe5f73d">
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<p>
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\({\boldsymbol \nabla} \cdot ({\boldsymbol \nabla} T) \equiv {\boldsymbol \nabla}^2 T\) is called the <b>Laplacian</b> of the scalar field \(T\).
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The Laplacian of a vector field \({\boldsymbol \nabla}^2 {\bf v}\) is also defined as the vector with components
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@@ -1610,36 +1610,36 @@ given by the Laplacian of the corresponding vector elements.
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</div>
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</div>
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<div id="outline-container-org3f8f01e" class="outline-6">
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<h6 id="org3f8f01e"><a href="#org3f8f01e">Curl of a gradient</a></h6>
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<div class="outline-text-6" id="text-org3f8f01e">
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<div id="outline-container-orgee1ca6a" class="outline-6">
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<h6 id="orgee1ca6a"><a href="#orgee1ca6a">Curl of a gradient</a></h6>
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<div class="outline-text-6" id="text-orgee1ca6a">
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<p>
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This always vanishes.
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</p>
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</div>
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</div>
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<div id="outline-container-org86a1e1f" class="outline-6">
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<h6 id="org86a1e1f"><a href="#org86a1e1f">Gradient of the divergence</a></h6>
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<div class="outline-text-6" id="text-org86a1e1f">
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<div id="outline-container-org2789da2" class="outline-6">
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<h6 id="org2789da2"><a href="#org2789da2">Gradient of the divergence</a></h6>
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<div class="outline-text-6" id="text-org2789da2">
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<p>
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\({\boldsymbol \nabla} ({\boldsymbol \nabla} \cdot {\bf v})\) does not appear often in physics. No special name.
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</p>
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</div>
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</div>
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<div id="outline-container-orgdca9d9a" class="outline-6">
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<h6 id="orgdca9d9a"><a href="#orgdca9d9a">Divergence of a curl</a></h6>
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<div class="outline-text-6" id="text-orgdca9d9a">
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<div id="outline-container-org62ec566" class="outline-6">
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<h6 id="org62ec566"><a href="#org62ec566">Divergence of a curl</a></h6>
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<div class="outline-text-6" id="text-org62ec566">
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<p>
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This always vanishes.
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</p>
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</div>
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</div>
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<div id="outline-container-org613cb02" class="outline-6">
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<h6 id="org613cb02"><a href="#org613cb02">Curl of curl</a></h6>
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<div class="outline-text-6" id="text-org613cb02">
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<div id="outline-container-org5cd2844" class="outline-6">
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<h6 id="org5cd2844"><a href="#org5cd2844">Curl of curl</a></h6>
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<div class="outline-text-6" id="text-org5cd2844">
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<p>
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\[
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{\boldsymbol \nabla} \times ({\boldsymbol \nabla} \times {\bf v}) = {\boldsymbol \nabla} ({\boldsymbol \nabla} \cdot {\bf v}) - {\boldsymbol \nabla}^2 {\bf v}
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@@ -1651,6 +1651,8 @@ This always vanishes.
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</div>
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<br><ul class="navigation-links"><li>Prev: <a href="c_m_dc_pr.html">Product Rules <small>[c.m.dc.pr]</small></a></li><li>Next: <a href="c_m_ic.html">Integral Calculus <small>[c.m.ic]</small></a></li><li>Up: <a href="c_m_dc.html">Differential Calculus <small>[c.m.dc]</small></a></li></ul>
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<br>
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<hr>
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<div class="license">
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<a rel="license noopener" href="https://creativecommons.org/licenses/by/4.0/"
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@@ -1664,7 +1666,7 @@ target="_blank">Creative Commons Attribution 4.0 International License</a>.
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</div>
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<div id="postamble" class="status">
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<p class="author">Author: Jean-Sébastien Caux</p>
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<p class="date">Created: 2022-02-10 Thu 08:32</p>
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<p class="date">Created: 2022-02-13 Sun 21:20</p>
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<p class="validation"></p>
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</div>
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