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第77行： − − − − <math>V = x^6 + ax^4 + bx^3 + cx^2 + dx \, </math>+ − − X ^ 6 + ax ^ 4 + bx ^ 3 + cx ^ 2 + dx ，/ math − − − − − − Depending on the parameter values, the potential function may have three, two, or one different local minima, separated by the loci of fold bifurcations. At the butterfly point, the different 3-surfaces of fold bifurcations, the 2-surfaces of cusp bifurcations, and the lines of swallowtail bifurcations all meet up and disappear, leaving a single cusp structure remaining when {{nowrap|''a'' > 0}}. − − Depending on the parameter values, the potential function may have three, two, or one different local minima, separated by the loci of fold bifurcations. At the butterfly point, the different 3-surfaces of fold bifurcations, the 2-surfaces of cusp bifurcations, and the lines of swallowtail bifurcations all meet up and disappear, leaving a single cusp structure remaining when . − − 根据参数值的不同，势函数可能由折叠分叉的轨迹分开有三个、两个或一个不同的局部极小值。在蝶形点处，折叠分叉的不同三面、尖点分叉的两面、燕尾分叉的线条都相遇并消失，留下一个单一的尖点结构。 − −
→蝴蝶灾难
=== 蝴蝶灾难 ===
=== 蝴蝶灾难 ===
:<math>V = x^6 + ax^4 + bx^3 + cx^2 + dx \, </math>
:<math>V = x^6 + ax^4 + bx^3 + cx^2 + dx \, </math>
根据参数值的不同，势函数可能由折叠分叉的轨迹分开有三个、两个或一个不同的局部极小值。在蝶形点处，折叠分叉的不同三面、尖点分叉的两面、燕尾分叉的线条都相遇并消失，留下一个单一的尖点结构{{nowrap|''a'' > 0}}。
== 两个活动变量的势函数 ==
== 两个活动变量的势函数 ==