I should say that is for a function of two variables to try to decide whether a given critical point is a minimum, a maximum or a saddle point.

但这种办法并不普遍，只能用于二元函数，来判断是极小值点、极大值点还是鞍点。

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We establish a Lagrange multiplier theorem for strict efficiency in convex settings and express strict points as saddle points of an appropriate Lagrangian function.

讨论凸多目标最优化问题的严有效解，建立了拉格朗日乘子定理，并把严有效解表示为一个适当的拉格朗日函数的鞍。

youdao

It is set up the equipment adjusted and has such function: flat and saddle stitching.

它设有校车调整装置，具有平订或骑马订功能。

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