2006 | OriginalPaper | Chapter
Saddle Points from the Geometric Point of View
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Nearly everybody can tell us what a
saddle
really is. Most of those who teach or study (a) mathematics, (b) mathematical economics, (c) econometrics, or (d) operations research are able to define the term
saddle point
— verbally or by means of equations and/or inequalities. But only very few of them are able or willing to draw, on a piece of paper or in a paper to be published, a surface in ℝ
3
that contains a saddle point.