unc_n2_treccani.m

it contains many classic Test Problems for Unconstrained Optimization such as camel6,treccani,goldst

function [f]=unc_n2_treccani(x)
%reference:
%note that you can get the formulation of unc_n2_treccani from some
%aritcles,such as
%(1)LS Zhang, CK Ng, D Li, WW Tian  'A New Filled Function Method for Global Optimization',
%Journal of Global Optimization,
%
%algorithm:
%below code is  edited according to 
%(1)LS Zhang, CK Ng, D Li, WW Tian  'A New Filled Function Method for Global Optimization',
%Journal of Global Optimization,
%
% solution:
% where the bounds are -3<=x1,x2<=3;
% The global minimum is at x*=(0,0) or x*=(-2,0) and f(x*)= 0;

%Copyright:
% programmers:oiltowater.
% It comply with the GPL2.0
% Copyright 2006  oiltowater 

x1=x(1,1);
x2=x(2,1);
f=x1.^4+4*x1.^3+4*x1.^2+x2.^2;