Initializing help system before first use

Problem handling

  • Mosel can handle several problems in a given model file. A default problem is associated with every model.
  • Built in type mpproblem to identify mathematical programming problems
    • The same decision variable (type mpvar) may be used in several problems
    • Constraints (type linctr) belong to the problem where they are defined
  • The statement with allows to open a problem (= select the active problem): 
    •  declarations
   myprob: mpproblem
 end-declarations
 ...
 with myprob do
   x+y = 0
 end-do
  • Modules can define other specific problem types. New problem types can also be defined by combining existing ones, for instance: 
    •   mypbtyp = mpproblem and somepbtype
  • Problem types support assignment: P1:= P2
    and additive assignment: P1 += P2

Parent Topic Mosel Language overview

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