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+model LotkaVolterra
+ "Predator-Prey equations describing population dynamics of two biological species"
+ parameter Real alpha;
+ parameter Real beta;
+ parameter Real delta;
+ parameter Real gamma;
+ Real x "population of prey";
+ Real y "population of predator";
+equation
+ der(x) = (alpha * x) - (beta * x * y);
+ der(y) = (delta * x * y) - (gamma * y);
+end LotkaVolterra;