tisonkun commented on issue #720:
URL: 
https://github.com/apache/datasketches-java/issues/720#issuecomment-3864061134

   Got it. Kudos to Kevin for his brilliant `CpcSketch`.
   
   We have three encoding tables here. The decoding tables are derived from 
encoding tables and the deriving logics are available.
   
   * LENGTH_LIMITED_UNARY_ENCODING_TABLE65 - having some comments, but doesn't 
tell how it is computed
   * COLUMN_PERMUTATIONS_FOR_ENCODING - having some comments, generated by 
"generatePermutationsForSLIDING.ml". We may reverse engineer from the comments 
to the original program
   * ENCODING_TABLES_FOR_HIGH_ENTROPY_BYTE - having some comments, generated by 
"columnProbabilities.ml" and "generateHuffmanCodes.ml". It is "23 
length-limited Huffman codes".
   
   Not sure how much details are included in the "Back to the Future" paper.
   


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