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roots of poly(2)
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TOPIC: roots of poly(2)
#6740
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 0
i wrote it
options = sdpsettings(options,'solver','bmibnb','bmibnb.lpsolver','gurobi');
options = sdpsettings(options,'verbose',6);
solvesdp([-5<=x<=5,p==0],[],options)

double(x)
double(p)

what is fault?
hossein
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#6741
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 0
options = sdpsettings(options,'solver','bmibnb','bmibnb.lpsolver','GUROBI');
oh,i missed it,i also wrote above line

but dont work
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#6742
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 32
What, nothing is displayed if you run?

Code:

options = sdpsettings('solver','bmibnb');
solvesdp([-5<=x<=5,p==0],[],options)
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#6743
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 0
it is an Embroglio,i wrote this completely:
sdpvar alfat q Zeta1 zetadot1;
x = [alfat;q;Zeta1;zetadot1];
p=alfat^4+Zeta1^2*zetadot1^2+q^6==>example

options = sdpsettings('bmibnb.uppersolver','fmincon','bmibnb.lowersolver','GUROBI');
options = sdpsettings(options,'solver','bmibnb','bmibnb.lpsolver','GUROBI');
options = sdpsettings(options);

solvesdp([-5<=x<=5,p==0],[],options)

double(x)
double(p)

is this correct or not?
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Last Edit: 2012/05/30 03:29 By hossein.
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#6744
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 0
how i tune solver options?
hossein
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#6745
Re: roots of poly(2) 11 Months, 4 Weeks ago Karma: 32
What I meant is that you should specify the solvers used by YALMIP in bmibnb, and then show me which solvers YALMIP picked by showing the displayed text when bmibnb is started. Hence, we can figure out if you only have slow solvers installed.

Code:

options = sdpsettings('solver','bmibnb');
solvesdp([-5<=x<=5,p==0],[],options)


Something like this will be displayed

Code:

>> solvesdp([-1<=recover(depends(p))<=1,p==0],[],sdpsettings('solver','bmibnb'))
* Starting YALMIP bilinear branch & bound.
* Upper solver   : fmincon
* Lower solver   : GUROBI
* LP solver      : GUROBI


Hence, YALMIP picked fmincon and gurobi, since these were avaliable
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