Mathc matrices/a146
Quelques propriétés des valeurs propres.
Installer et compiler ces fichiers dans votre répertoire de travail.
c06b.c |
---|
/* ------------------------------------ */
/* Save as : c06b.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
#define RCA R3
/* ------------------------------------ */
int main(void)
{
double a[RCA*RCA]={
+966,+98,+864,
+98,+692,+214,
+864,+214,+376
};
double p = rp_I(3)+1;
double **A = ca_A_mR(a, i_mR(RCA,RCA));
double **EigsValueA = eigs_mR(A, i_mR(RCA,C1) );
double **A_p = pow_mR(p,A,i_mR(RCA,RCA));
double **EigsValueA_p = eigs_mR(A_p,i_mR(RCA,C1) );
int i = 0;
clrscrn();
printf(" A :");
p_mR(A,S3,P0,C6);
printf(" EigsValue :");
p_mR(EigsValueA,S13,P3,C1);
printf(" A_%.0f :",p);
p_mR(A_p,S11,P0,C6);
printf(" EigsValueA_%.0f :",p);
p_mR(EigsValueA_p,S15,P3,C1);
stop();
clrscrn();
printf(" EigsValue A_%.0f :",p);
p_mR(EigsValueA_p,S15,P3,C1);
printf(" (EigsValues of A)**%.0f * :\n",p);
for(i=R1;i<=RCA;i++)
printf(" %+15.3f \n", pow(EigsValueA[i][C1],p));
printf("\n\n\n");
stop();
f_mR(A);
f_mR(EigsValueA);
f_mR(A_p);
f_mR(EigsValueA_p);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Les valeurs propres de A**P correspondent aux valeurs propres de A à la puissance P :
Exemple de sortie écran :
A :
+966 +98 +864
+98 +692 +214
+864 +214 +376
EigsValue :
+1628.836
+661.931
-256.767
A_3 :
+2685781976 +658552488 +1977709464
+658552488 +470783864 +532241040
+1977709464 +532241040 +1438006544
EigsValueA_3 :
+4321473836.193
+290026993.296
-16928445.489
Press return to continue.
EigsValue A_3 :
+4321473836.193
+290026993.296
-16928445.489
(EigsValues of A)**3 * :
+4321473836.193
+290026993.296
-16928445.489
Press return to continue.