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+// Network Synthesis : example 12.4 : (pg 12.3)

+s=poly(0,'s');

+p1=((s^4)+(3*(s)^2)+12);

+p2=((s^3)+(2*s));

+[r,q]=pdiv(p1,p2);

+[r1,q1]=pdiv(p2,r);

+[r2,q2]=pdiv(r,r1);

+[r3,q3]=pdiv(r1,r2);

+printf("\nEven part of P(s) = ((s^4)+(3*(s)^2)+12)");

+printf("\nOdd part of P(s) = ((s^3)+(2*s))");

+printf("\nQ(s)= m(s)/n(s)");

+// values of quotients in continued fraction expansion

+disp(q);

+disp(q1);

+disp(q2);

+disp(q3);

+printf("\nSince two quotient terms are negative, P(s) is  not hurwitz");