Specification tord-min-max

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enrich
   tord
with
   functions 
       min : tord × tord → tord;
       max : tord × tord → tord;
   
   variables 
       a : tord;
       b : tord;
   
   
   axioms 
      min-def: min(a, b) = (a < b ⊃ a;b);
      used for: ls;
      
      max-def: max(a, b) = (b < a ⊃ a;b);
      used for: ls;
   
   
end enrich