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-rw-r--r--257/CH9/EX9.28/example_9_28.sce9
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diff --git a/257/CH9/EX9.28/example_9_28.sce b/257/CH9/EX9.28/example_9_28.sce
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+s=%s
+sys=syslin('c',k/((s+16)*(s^2+2*s+2)))
+evans(sys)
+
+//stability
+
+[Ki,s]=kpure(sys)
+disp("k marginal is")
+disp(Ki)