This Demonstration shows the phase portrait in an equilateral triangle of the replicator-mutator dynamics with three strategies. The parameters
denote the payoff that an
-strategist obtains in an interaction with a
-strategist. The parameter
denotes the total fraction of mutants or entrants in the population. The parameters
denote the weights given by mutants to strategy
is the fraction of mutants that adopt strategy
. This Demonstration also calculates the critical points of the system and their corresponding eigenvalues, which are helpful in assessing the dynamic stability of the critical point.