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Evolutionary Game Theory
Replicator dynamics on 2×2 games — phase portraits and strategy evolution
Game Selection
Prisoner's Dilemma
Hawk-Dove
Stag Hunt
Coordination
Rock-Paper-Scissors
Payoff Matrix (row=A, col=B):
Strategy A
Strategy B
A
B
Prisoner's Dilemma: defection dominates. ESS at p(A)=0 (all defect) regardless of starting condition.
Initial freq A:
0.50
Run Simulation
Clear Trajectories
Phase Portrait (frequency of A)
Fixed points shown as circles (open=unstable, filled=stable). Click to start trajectory from that frequency.
Strategy Frequencies Over Time
Speed:
3×