From: jlee@cse.cuhk.edu.hk   
      
   A.L.  wrote:   
   >>> Hm... Who is "Father of Constraints"?... Looking in the past, there   
   >>> are quite a bit of "fathers" but no one at UBC...   
   >>   
   >>> A.L.   
   >>   
   >>How about Prof. Alan Mackworth?  The entire constraint field was started   
   >>with his seminal paper in 1977.   
      
   > Not sure.... I will check my sources...   
      
   > OK. D. Waltz, 1972, applied early prototype of constraint   
   > programming for scene recognition. Until today his algorithm is   
   > quoted in various works on constraints.   
   Well, David Waltz is the Grandfather of constraints!  The notions of   
   constraints and consistency techniques were formalized only in Mackworth's   
   paper, although, yes, the Waltz algorithm enforces AC (without coining the   
   name).   
      
   jim   
      
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