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<title>Jeff Epler's blog</title>
<modified>2019-03-09T01:33:35Z</modified>
<tagline>Photos, electronics, cnc, and more</tagline>
<author><name>Jeff Epler</name><email>jepler@unpythonic.net</email></author>
<entry>
<title>The Drake-Howard Equation</title>
<issued>2019-03-09T01:33:35Z</issued>
<modified>2019-03-09T01:33:35Z</modified>
<id>https://gamma.unpythonic.net/01552095215</id>
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The Drake-Howard equation is:
&lt;blockquote&gt;&lt;i&gt;N = R&lt;sub&gt;*&lt;/sub&gt; × f&lt;sub&gt;#&lt;/sub&gt;
 × n&lt;sub&gt;e&lt;/sub&gt;
 × f&lt;sub&gt;q&lt;/sub&gt;
 × d&lt;sub&gt;l&lt;/sub&gt;
 × f&lt;sub&gt;c&lt;/sub&gt;
 × L&lt;/i&gt;&lt;/blockquote&gt;
where &lt;i&gt;N&lt;/i&gt; = the number of elder gods in the multiverse which might wish to consume our souls
and
&lt;ul&gt;
&lt;li&gt; &lt;i&gt;R&lt;sub&gt;*&lt;/sub&gt;&lt;/i&gt; = The number of regular languages
&lt;li&gt; &lt;i&gt;f&lt;sub&gt;#&lt;/sub&gt;&lt;/i&gt; = The fraction of regular languages that match at least one string
&lt;li&gt; &lt;i&gt;n&lt;sub&gt;e&lt;/sub&gt;&lt;/i&gt; = The fraction of self-Gödelizing strings per regular language that matches at least one string
&lt;li&gt; &lt;i&gt;f&lt;sub&gt;q&lt;/sub&gt;&lt;/i&gt; = The fraction of self-Gödelizing strings that are also functional quines
&lt;li&gt; &lt;i&gt;d&lt;sub&gt;l&lt;/sub&gt;&lt;/i&gt; = The sum to infinity of the average measure of quine islands divided by Levenshtein distance
&lt;li&gt; &lt;i&gt;f&lt;sub&gt;c&lt;/sub&gt;&lt;/i&gt; = The fraction of of all functional quines which can be realized by Standard Model matter
&lt;li&gt; &lt;i&gt;L&lt;/i&gt; = The time between Second Order Grand Conjunctions
&lt;/ul&gt;

&lt;p&gt;As &lt;i&gt;R&lt;sub&gt;*&lt;/sub&gt;&lt;/i&gt; is infinite (actually, &lt;i&gt;&amp;#x200e;א&lt;/i&gt;&lt;sub&gt;&amp;#x200e;1&lt;/sub&gt;) and all
other values are nonzero, it follows that the number of soul-devouring elder
gods is infinite.  The Drake-Howard Equation is also sometimes called &lt;a href=&quot;https://en.wikipedia.org/wiki/Rule_110&quot;&gt;Rule 110&lt;/a&gt;.
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