<p><span class="math-container">$\exists\:$</span> another solution <span class="math-container">$\:\big|\:$</span> Someone shall present it.<br />
&quot;It is better to solve one problem five different<br />
ways, than to solve five problems one way.&quot;<br />
<em>George Pólya  (1887 - 1985)</em></p>
<p><span class="math-container">$\exists\:$</span> something <span class="math-container">$\:\big|\:$</span> I've overlooked it.<br />
&quot;The Art of being wise is the Art of knowing what to overlook.&quot;<br />
<em>William James (1842 - 1910)</em></p>
<p><a href="https://math.stackexchange.com/a/3890249/316749">An answer of mine, regarding Kaprekar's constant <span class="math-container">$6174$</span></a><br />
Quite happy with it, despite still being incomplete.</p>
<p>( This profile is written for math.SE, but Stack Exchange plainly copies it over to other sites.<br />
<span class="math-container">$\;$</span> Where it makes less sense. )</p>

Hanno