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{{Information |Description = Paraboloid surface with a marked maximum point. |Source = Created with the help of [http://en.wikipedia.org/wiki/GraphCalc GraphCalc] |Date = 19 January 2007 |Author = [http://en.wikipedia.org/wiki/User:Freiddy Freiddy]] |Perm
{{Information |Description = Paraboloid surface with a marked maximum point. |Source = Created with the help of [http://en.wikipedia.org/wiki/GraphCalc GraphCalc] |Date = 09 January 2007 |Author = [http://en.wikipedia.org/wiki/User:Freiddy Freiddy]] |Perm