Texas Instruments TI89 and TI92 Plus Computer 



Version  1.0 
Download  [ extrema.zip ] 
Description  Local extrema (minimum, maximum, and saddle points), 2variable. 
Screen shots 

Documentation  Usage:
extrema(Expr,VarList)>Matrix Expr: A continuous function. VarList: A list of the independant variables, may be used to select a specific point of evaluation. List only the variables for polynomials and all solutions will be returned. For trigonometric (periodic) functions a general solution is returned, you must select the specific point to evaluate the type of extremum. Return value:
Examples:
2. extrema(cos(y)cos(x),{x, y})
3. extrema(cos(y)cos(x),{x=pi, y=0})
4. submat(extrema(x^{3}3x+y^{3}3y,{x,
y}),1,1,1,2)>vector
