From: fateman@gmail.com   
      
   On Saturday, June 23, 2018 at 10:16:26 PM UTC-7, Jeff Barnett wrote:   
      
   >   
   > I remember a note a million years ago in either CACM or the British   
   > Computer Journal that showed how to compute any A(n,m), where 0<=n<=N   
   > and 0<=n<=M, in space proportional to NxM. This was done in Algol and   
   > used an array of dimension NxM. I know that this has little to do with   
   > the original question but thought I'd share the memory.   
   > --   
   > Jeff Barnett   
      
   Here's one algorithm   
   https://www.sciencedirect.com/science/article/pii/0304397588900461   
      
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