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  <title>Infinitely many ‘proofs’ of Pythagoras’ theorem</title>
  <dc:creator>Mohan Rajendran</dc:creator>
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  <description><![CDATA[ An interactive common-lattice proof of Pythagoras’ theorem, with historical anchor positions from a medieval dissection to Perigal and beyond. ]]></description>
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  <pubDate>Tue, 21 Jul 2026 00:00:00 GMT</pubDate>
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  <title>Kolams on Octahedron</title>
  <dc:creator>Mohan Rajendran</dc:creator>
  <link>https://mathnomad.in/writing/articles/kolams-on-an-octahedron/</link>
  <description><![CDATA[ An expository graph-theoretic classification of triangular binary kolam tiles on an octahedron. ]]></description>
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  <pubDate>Mon, 20 Jul 2026 18:40:05 GMT</pubDate>
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  <title>The Law of Cosines</title>
  <dc:creator>Mohan Rajendran</dc:creator>
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  <description><![CDATA[ An interactive tessellation proof of the law of cosines, organised over the two-dimensional moduli space of triangle shapes. ]]></description>
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  <pubDate>Mon, 20 Jul 2026 00:00:00 GMT</pubDate>
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  <title>Tessellations</title>
  <dc:creator>Mohan Rajendran</dc:creator>
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  <description><![CDATA[ Interactive investigations in which periodic patterns turn area identities into movable geometric proofs. ]]></description>
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  <pubDate>Mon, 20 Jul 2026 00:00:00 GMT</pubDate>
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  <title>From Sixteen Tiles to Fifty-One Kolams</title>
  <dc:creator>Mohan Rajendran</dc:creator>
  <link>https://mathnomad.in/writing/articles/binary-kolam-tiles/</link>
  <description><![CDATA[ An interactive exposition connecting square kolam tiles, graph theory, Boolean satisfiability, exhaustive enumeration, and Burnside’s lemma. ]]></description>
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  <pubDate>Fri, 17 Jul 2026 09:15:00 GMT</pubDate>
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  <title>Sixteen Tiles, One Kolam Puzzle</title>
  <dc:creator>Mohan Rajendran</dc:creator>
  <link>https://mathnomad.in/courses/resources/kolam-investigation/</link>
  <description><![CDATA[ A classroom-ready investigation using binary tiles to explore local constraints, connectivity and sliding-puzzle invariants. ]]></description>
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  <pubDate>Wed, 15 Jul 2026 00:00:00 GMT</pubDate>
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  <title>Kolam Tiles</title>
  <dc:creator>Mohan Rajendran</dc:creator>
  <link>https://mathnomad.in/projects/entries/kolam-tile-laboratory/</link>
  <description><![CDATA[ Binary kolam tiles on square boards and polyhedral surfaces: local matching, global connectivity, graph structure, symmetry, puzzles, and interactive constructions. ]]></description>
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  <pubDate>Wed, 15 Jul 2026 00:00:00 GMT</pubDate>
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