65 ;;Quote: catastrophe theory describes the shapes of equilibrium surfaces; for at most 4 factors, there are 7 elementary catastrophes

66 ;;Quote: model a dog's performance under rage and fear by a behavioral surface with a cusp catastrophe

66 ;;Quote: the behavioral surface for a dog under rage and fear contains a pleat of unlikely behavior that narrows to a point

68 ;;Quote: the fold curve in catastrophe theory marks the edges of the pleat

68 ;;Quote: a pleated behavioral surface represents the cusp catastrophe; the fold curve appears as a cusp

68+;;Quote: the cusp catastrophe is the most productive of catastrophe theory

68 ;;Quote: in a cusp catastrophe, the behavior surface has two sheets of possible behaviors and an intermediate sheet of inaccessible behavior

75 ;;Quote: the attractor of a system is a stable cycle of states; e.g., the base note of a bowed violin string

67 ;;Quote: divergent behavior at the singularity of a cusp catastrophe; behavior depends critically on conditions

80 ;;Quote: if a process is governed by only two control factors, then its behavior surface can only have folds and cusps; e.g., a cusp catastrophe

80 ;;Quote: the butterfly catastrophe occurs from trimodal behavior; allows a stable, compromise position

80 ;;Quote: the butterfly factor creates three cusps with a triangular pocket supporting stable behavior