Fonction mollifiante, C_infini à support compact
<a href="//commons.wikimedia.org/wiki/User:Fred_the_Oyster" title="User:Fred the Oyster">Fred the Oyster</a>
<a href="//commons.wikimedia.org/wiki/File:Mollifier_illustration.png" class="image"><img alt="Mollifier illustration.png" src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Mollifier_illustration.png/100px-Mollifier_illustration.png" decoding="async" width="100" height="32" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Mollifier_illustration.png/150px-Mollifier_illustration.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Mollifier_illustration.png/200px-Mollifier_illustration.png 2x" data-file-width="500" data-file-height="158"></a>