Routh's Criterion
Routh's Criterion
1
3
2
-1
2
-1
-1
3.5
2.5
-1
0
-2.42857142857143
-0.428571428571429
0
0
1.88235294117647
-1
0
0
-1.71875
0
0
0
-1
0
0
0
0
0
0
0
The polynomial p(x) = x
^{6}
+ 2x
^{5}
+ 3x
^{4 }
- x
^{3}
+ 2x
^{2}
- x - 1 has three roots with positive real parts.
Reference: K. Ogata, Modern Control Engineering, pp. 253-257.