Fig 1.
The two-dimensional simplex S in the space (x1, x2, x3).
The points (x1, x2, x3) = (1, 0, 0), (x1, x2, x3) = (0, 1, 0), and (x1, x2, x3) = (0, 0, 1) correspond, respectively, to the vertices ,
, and
, where all individuals play, respectively, strategies H, P, and N. Along the edge joining
and
(respectively,
and
,
and
) the strategy N (respectively, P, H) is not played.
Fig 2.
The taxonomy of dynamic regimes.
In these figures, a full dot • represents a locally attractive stationary state, an empty dot ∘ represents a repulsive stationary state, while a saddle point is indicated by drawing its insets and outsets. Only some representative trajectories are sketched.