Problem fuction feasp

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Jansenn
Jansenn 2011-6-14
I tried to run a program in MATLAB (2008b, 2010a, 2011a) with function "feasp" to solve a LMI but when i tried to run in a laptop using Windows Vista and processor Intel Core™2 Duo T5750 2.00Ghz 32-bit, the "tmin" value is negative for a infeasibility LMI problem. i had no problem in others computers with core solo and Windows XP. Program:
clear all; clc;
A = [1 1; 2 -2]; eig(A)
setlmis([]) P = lmivar(1,[2 1]); lmiterm([1 1 1 P],1,A,'s'); % LMI #1 lmiterm([-2 1 1 P],1,1); % LMI #2: P lmis = getlmis; [tmin,xfeas] = feasp(lmis); tmin
P = dec2mat(lmis,xfeas,P)
Program's answers:
tmin =
-2.8468e-013
P =
1.0e+003 *
0.7710 -1.3731
-1.3731 2.4451

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