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→折叠灾难
=== 折叠灾难 ===
=== 折叠灾难 ===
[[File:fold bifurcation.svg|frame|right|160px|Stable and unstable pair of extrema disappear at a fold bifurcation|链接=Special:FilePath/Fold_bifurcation.svg]]
[[File:fold bifurcation.png|frame|right|160px|稳定和不稳定的极值对在折叠分叉处消失]]
:<math>V = x^3 + ax\,</math>
:<math>V = x^3 + ax\,</math>