Editing Saddle point (section)

== References ==
=== Citations ===
{{Reflist}}

=== Sources ===
{{refbegin}}
* {{citation |last1=Gray |first1=Lawrence F. |last2=Flanigan |first2=Francis J. |last3=Kazdan |first3=Jerry L. |last4=Frank |first4=David H. |last5=Fristedt |first5=Bert |title=Calculus two: linear and nonlinear functions |publisher=Springer-Verlag |location=Berlin |year=1990 |page=[https://archive.org/details/calculustwolinea00flan/page/375 375] |isbn=0-387-97388-5 |url-access=registration |url=https://archive.org/details/calculustwolinea00flan/page/375 }}
* {{citation |last1=Hilbert |first1=David |author1-link = David Hilbert |last2=Cohn-Vossen |first2=Stephan |author2-link = Stephan Cohn-Vossen |title = Geometry and the Imagination |publisher=[[Chelsea Publishing|Chelsea]] |location = New York, NY |edition=2nd |isbn = 978-0-8284-1087-8 |year=1952 }}
* {{citation |first=Tobias |last = von Petersdorff |chapter-url = https://www.math.umd.edu/~petersd/246/stab.html |chapter=Critical Points of Autonomous Systems |year=2006 |title = Differential Equations for Scientists and Engineers (Math 246 lecture notes) }}
* {{citation |last = Widder |first = D. V. |author-link=David Widder |title = Advanced calculus |publisher=Dover Publications |location = New York, NY |year=1989 |page=128 |isbn = 0-486-66103-2 }}
* {{citation |last = Agarwal |first = A. |title = Study on the Nash Equilibrium (Lecture Notes) |url = http://www.cse.iitd.ernet.in/~rahul/cs905/lecture3/nash1.html#SECTION00041000000000000000 }}
{{refend}}