==== Promiscuous Pipelines - Day 5 - 2015-09-05 ====

notes from the fifth day of the [[promiscuous_pipelines]] workshop

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====Generating all Trees====

"(Pruning and grafting.) Representing binary trees as in Algorithm B, design an algorithm that visits all link tables l1...ln and r1...rn in such a way that, between visits, exactly one link changes from j to 0 and another from 0 to j, for some index j. (In other words, every step removes some subtree j from the binary tree and places it elsewhere, preserving preorder)."
--Knuth, Generating All Trees: History of Combinatorial Generation. 
  
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