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	<title>MetaFilter posts tagged with logic and math</title>
	<link>http://www.metafilter.com/tags/logic+math</link>
	<description>Posts tagged with 'logic' and 'math' at MetaFilter.</description>
	<pubDate>Sat, 30 May 2009 21:30:41 -0800</pubDate> <lastBuildDate>Sat, 30 May 2009 21:30:41 -0800</lastBuildDate>

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		<title>I am a strange loop.</title>
		<link>http://www.metafilter.com/82063/I%2Dam%2Da%2Dstrange%2Dloop</link>
		<description>&lt;a href="http://prelectur.stanford.edu/lecturers/hofstadter/excerpts.html"&gt;Douglas Hofstadter&apos;s&lt;/a&gt; &lt;em&gt;&lt;a href=&quot;http://en.wikipedia.org/wiki/G%C3%B6del,_Escher,_Bach&quot;&gt;G&amp;#0246;del, Escher, Bach: An Eternal Golden Braid&lt;/a&gt;&lt;/em&gt; has been recorded as &lt;a href=&quot;http://ocw.mit.edu/OcwWeb/hs/geb/VideoLectures/&quot;&gt;a series of video lectures&lt;/a&gt; for MIT&apos;s &lt;a href=&quot;http://ocw.mit.edu/OcwWeb/web/home/home/index.htm&quot;&gt;Open Courseware&lt;/a&gt; project.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2009:site.82063</guid>
		<pubDate>Sat, 30 May 2009 21:30:41 -0800</pubDate>
		<category>Art</category>
		<category>Bach</category>
		<category>Course</category>
		<category>Escher</category>
		<category>fractal</category>
		<category>GEB</category>
		<category>Godel</category>
		<category>identity</category>
		<category>KillYourTelevision</category>
		<category>Learn</category>
		<category>Lecture</category>
		<category>logic</category>
		<category>Math</category>
		<category>metaphysic</category>
		<category>MIT</category>
		<category>OCW</category>
		<category>Open</category>
		<category>philosophy</category>
		<category>recursive</category>
		<category>Science</category>
		<category>Video</category>
		<dc:creator>loquacious</dc:creator>
	</item>
      <item>
		<title>The Mathemagician and Pied Puzzler, and others</title>
		<link>http://www.metafilter.com/75321/The%2DMathemagician%2Dand%2DPied%2DPuzzler%2Dand%2Dothers</link>
		<description>&lt;a href="http://www.g4g4.com/paul/BOOK.pdf"&gt;&lt;i&gt;The Mathemagician and Pied Puzzler&lt;/i&gt;&lt;/a&gt; &lt;small&gt;(PDF, rough table of contents &lt;a href=&quot;http://www.worldcat.org/oclc/40338600?tab=details&quot;&gt;here&lt;/a&gt;)&lt;/small&gt; is a collection of puzzles created by members of the &lt;a href=&quot;http://www.g4g4.com/&quot;&gt;Gathering 4 Gardner Foundation&lt;/a&gt;, in tribute to &lt;a href=&quot;http://www.csicop.org/si/9803/gardner.html&quot;&gt;the man himself&lt;/a&gt; &lt;small&gt;(&lt;a href=&quot;http://www.metafilter.com/mefi/21286&quot;&gt;previously&lt;/a&gt;)&lt;/small&gt;.  Also freely available at the G4G site is &lt;em&gt;&lt;a href=&quot;http://www.g4g4.com/pc/pc92.pdf&quot;&gt;Puzzle Craft&lt;/a&gt;&lt;/em&gt; &lt;small&gt;(PDF)&lt;/small&gt;, by Stewart Coffin.  &lt;small&gt;(&lt;em&gt;The Puzzling World of Polyhedral Dissections&lt;/em&gt;, also by Coffin, is available &lt;a href=&quot;http://www.johnrausch.com/PuzzlingWorld/default.htm&quot;&gt;here&lt;/a&gt;.)&lt;/small&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2008:site.75321</guid>
		<pubDate>Wed, 01 Oct 2008 19:21:50 -0800</pubDate>
		<category>logic</category>
		<category>martingardner</category>
		<category>math</category>
		<category>owmybrain</category>
		<category>puzzles</category>
		<category>stewartcoffin</category>
		<dc:creator>cog_nate</dc:creator>
	</item>
      <item>
		<title>Geek Logik - math for every day</title>
		<link>http://www.metafilter.com/56110/Geek%2DLogik%2Dmath%2Dfor%2Devery%2Dday</link>
		<description> Geek Logik is &lt;a href=&quot;http://www.powells.com/tqa/sundem.html&quot;&gt;Garth Sundem&lt;/a&gt;&apos;s &lt;a href=&quot;http://www.amazon.com/exec/obidos/ASIN/0761140212/metafilter-20/ref=nosim/&quot;&gt;book &lt;/a&gt;&amp;amp; &lt;a href=&quot;http://geeklogik.blogspot.com&quot;&gt;blog&lt;/a&gt; about equations for every day living, including &lt;a href=&quot;http://geeklogik.blogspot.com/2006/10/how-many-cups-of-coffee-do-you-need-to.html &quot;&gt;how many cups of coffee you require to be functional&lt;/a&gt;, &lt;a href=&quot;http://geeklogik.blogspot.com/2006/10/who-should-you-vote-for.html&quot;&gt;who to vote for&lt;/a&gt;, and others.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2006:site.56110</guid>
		<pubDate>Tue, 07 Nov 2006 09:47:20 -0800</pubDate>
		<category>books</category>
		<category>funny</category>
		<category>geek</category>
		<category>humor</category>
		<category>logic</category>
		<category>math</category>
		<dc:creator>xmutex</dc:creator>
	</item>
      <item>
		<title>Who has the fish?</title>
		<link>http://www.metafilter.com/44031/Who%2Dhas%2Dthe%2Dfish</link>
		<description>&lt;a href="http://www.coudal.com/thefish.php"&gt;Who has the fish?&lt;/a&gt; Einstein logic puzzle.  If I can do it, you guys can.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.44031</guid>
		<pubDate>Thu, 04 Aug 2005 15:22:41 -0800</pubDate>
		<category>Einstein</category>
		<category>fish</category>
		<category>logic</category>
		<category>math</category>
		<category>puzzle</category>
		<dc:creator>swift</dc:creator>
	</item>
      <item>
		<title>Nature of Mathematical Truth</title>
		<link>http://www.metafilter.com/43828/Nature%2Dof%2DMathematical%2DTruth</link>
		<description>&lt;a href="http://www.edge.org/3rd_culture/vhd05/vhd05_index.html"&gt;G&amp;#0246;del and the Nature of Mathematical Truth&lt;/a&gt; : A Talk with Verena Huber-Dyson  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.43828</guid>
		<pubDate>Fri, 29 Jul 2005 10:24:24 -0800</pubDate>
		<category>godel</category>
		<category>logic</category>
		<category>math</category>
		<category>mathematics</category>
		<category>philosophy</category>
		<category>science</category>
		<category>truth</category>
		<dc:creator>Gyan</dc:creator>
	</item>
      <item>
		<title>You can&apos;t prove this title wasn&apos;t an attempt to illustrate Godel</title>
		<link>http://www.metafilter.com/43130/You%2Dcant%2Dprove%2Dthis%2Dtitle%2Dwasnt%2Dan%2Dattempt%2Dto%2Dillustrate%2DGodel</link>
		<description> Godel&apos;s theorems have been used to extrapolate a great &lt;a href=&quot;http://www.sm.luth.se/~torkel/eget/godel.html&quot;&gt;many&lt;/a&gt; &quot;truths&quot; about the world. &lt;a href=&quot;http://www.sm.luth.se/%7Etorkel/&quot;&gt;Torkel Franzen&lt;/a&gt; sets the record &lt;a href=&quot;http://www.ucalgary.ca/~rzach/logblog/2005/06/franzn-on-use-and-abuse-of-gdels.html&quot;&gt;straight&lt;/a&gt; in his new book &lt;a href=&quot;http://www.amazon.com/exec/obidos/ASIN/1568812388/metafilter-20/ref=nosim/&quot;&gt;Godel&apos;s Theorem: An Incomplete Guide to Its Use and Abuse&lt;/a&gt;.  Read the &lt;a href=&quot;http://www.sm.luth.se/~torkel/eget/tic.html&quot;&gt;introduction&lt;/a&gt; (PDF). If you want, check out his &lt;a href=&quot;http://www.sm.luth.se/~torkel/eget/godel/theorems.html&quot;&gt;explanation&lt;/a&gt; of the theorems.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.43130</guid>
		<pubDate>Wed, 29 Jun 2005 02:59:04 -0800</pubDate>
		<category>godel</category>
		<category>logic</category>
		<category>math</category>
		<category>mathematics</category>
		<category>philosophy</category>
		<category>science</category>
		<category>truth</category>
		<dc:creator>Gyan</dc:creator>
	</item>
      <item>
		<title>The Complexity of a Controversial Concept</title>
		<link>http://www.metafilter.com/42922/The%2DComplexity%2Dof%2Da%2DControversial%2DConcept</link>
		<description>&lt;a href="http://bactra.org/bulletin/logic-of-diversity.html"&gt;The Logic of Diversity&lt;/a&gt; &quot;A new book, &lt;i&gt;The Wisdom of Crowds&lt;/i&gt; [&lt;a href=&quot;http://www.metafilter.com/mefi/33307&quot;&gt;..:&lt;/a&gt;]  by &lt;a href=&quot;http://greg.org/archive/new_yorker_magazine_database.php&quot;&gt;The New Yorker&lt;/a&gt; columnist James Surowiecki, has recently popularized the idea that groups can, in some ways, be smarter than their members, which is superficially similar to &lt;a href=&quot;http://www.cscs.umich.edu/~spage/&quot;&gt;Page&apos;s results&lt;/a&gt;. While Surowiecki gives many examples of what one might call collective cognition, where groups out-perform isolated individuals, he really has only one explanation for this phenomenon, based on one of his examples: jelly beans [&lt;a href=&quot;http://www.randomhouse.com/features/wisdomofcrowds/contest.html&quot;&gt;...&lt;/a&gt;] averaging together many independent, unbiased guesses gives a result that is probably closer to the truth than any one guess. While true &#8212; it&apos;s the &lt;a href=&quot;http://en.wikipedia.org/wiki/Central_limit_theorem&quot;&gt;central limit theorem&lt;/a&gt; of statistics &#8212; it&apos;s far from being the only way in which &lt;a href=&quot;http://www.cscs.umich.edu/diversity/&quot;&gt;diversity&lt;/a&gt; can be beneficial in problem solving.&quot; &lt;a href=&quot;http://bactra.org/weblog/362.html&quot;&gt;(Three-Toed Sloth)&lt;/a&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.42922</guid>
		<pubDate>Mon, 20 Jun 2005 18:03:37 -0800</pubDate>
		<category>complexity</category>
		<category>diversity</category>
		<category>evolution</category>
		<category>heuristics</category>
		<category>logic</category>
		<category>math</category>
		<category>mathematics</category>
		<category>physics</category>
		<category>probability</category>
		<category>research</category>
		<category>science</category>
		<category>statistics</category>
		<dc:creator>kliuless</dc:creator>
	</item>
      <item>
		<title>PuzzleFilter.</title>
		<link>http://www.metafilter.com/34927/PuzzleFilter</link>
		<description>&lt;a href="http://www.geocities.com/bob_kraus_2000/"&gt;&quot;WARNING!!! The puzzles on this site are very difficult,&lt;/a&gt; and most require the use of a good spreadsheet program in order to solve them. It will take many hours, perhaps days, to solve each puzzle...&quot;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2004:site.34927</guid>
		<pubDate>Wed, 11 Aug 2004 21:08:52 -0800</pubDate>
		<category>games</category>
		<category>logic</category>
		<category>math</category>
		<category>puzzle</category>
		<category>puzzles</category>
		<dc:creator>limitedpie</dc:creator>
	</item>
      <item>
		<title></title>
		<link>http://www.metafilter.com/7906/</link>
		<description>&lt;a href="http://www.worlds-fastest-website.com/why-mathematicians-care-about-hat-color.htm"&gt;What Color is My Hat?&lt;/a&gt; I [heart] these mathematical conundrums -- simple, easy-to-state, seemingly obvious logic problems that have solutions that completely defy common sense.  Here&apos;s another you can spring on a friend:  &quot;You want to fry up three pieces of french toast.  You have a frying pan that is just large enough to accomodate two pieces of bread at a time.  If it takes you 30 seconds to fry one side of bread, and each piece of must be fried on both sides, how long will it take you to cook up three pieces (assuming that the act of flipping a piece or adding/ removing it to or from the pan takes no time).  Think about it.  Answer inside.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2001:site.7906</guid>
		<pubDate>Fri, 25 May 2001 10:22:29 -0800</pubDate>
		<category>brainteasers</category>
		<category>logic</category>
		<category>math</category>
		<category>mathematics</category>
		<category>puzzles</category>
		<dc:creator>Shadowkeeper</dc:creator>
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