## 15 Reputation

12 years, 34 days

## how did it works "minimize"...

I have the following function with multiple extremes and I intend to find the global minimum within the following constrains

f:=x*sin(4*x)+1.1*sin(2*y)

x=0...10

y=-10..10

My MAPLE version 15 lets you use two possibilities
1. The optimization package MAPLE using the Minimize command, and opt for some of the available methods such as the method quasinewton . however, from what I gather , this optimization package allows to find local minimum

2 . use the minimize command, which returns the global minimum for that function , but it is not known completely what method used to achieve the value found .how did it works?

According to the response of Markiyan Hirnyk , it seemed that the procedure minimizes the associated command is to find all values ​​within the range ( bounds ) and replace them in the target function then compares the values ​​to obtain the least of them . this behavior is very similar to what occurs for example in the finite element method . I admit being wrong in my conclusion from this that I ask for your help

função_teste_2.mw

## numerical method ??...

firstly thank you,
in fact this is a "stuff maple", and it is not clear which method is used. Perhaps I can say that the  command minimize work as a kind of numerical method because it seems to be what happens.

## grateful...

this is what i really want

thank you

## grateful...

this is what i really want

thank you

## piecewise abs Maximize...

hi maplefriends, i´m trying to solve a piecewise funtion, and gold is find the maximum and  location, for that i use de package Maximize.unfortunately the result i have is the local maximum, can anyone show me, how can i do that?

## great!...

thanks a lot , exactly what i need

## great!...

thanks a lot , exactly what i need

## exactly . this is the point....

perfect andri, is a good ideia to continue...

regards

## exactly . this is the point....

perfect andri, is a good ideia to continue...

regards

## the result must be indicie...

tanks andri,
but the result must be indicies not the values.

for example, looking for the document u made. the result i expected is

c:=8,6,8,8 # the minor indicies in the matrix a

do you think is possible i guet it doing

for ic from 1 to 4 do

P[ic]:=a[c(ic),ic]

end do

maybe it look for the indicies in matrix a????

## the result must be indicie...

tanks andri,
but the result must be indicies not the values.

for example, looking for the document u made. the result i expected is

c:=8,6,8,8 # the minor indicies in the matrix a

do you think is possible i guet it doing

for ic from 1 to 4 do

P[ic]:=a[c(ic),ic]

end do

maybe it look for the indicies in matrix a????

## Random Matrix whit restriction...

thaks a lot ! is a good idea!!!

## Random Matrix whit restriction...

thaks a lot ! is a good idea!!!

## this is a good  enough !! tanks a l...

this is a good  enough !! tanks a lot

## this is a good  enough !! tanks a l...

this is a good  enough !! tanks a lot

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