What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Who Has the Most Change?
Determine whether a vector is monotonically increasing
Remove the air bubbles
Flag largest magnitude swings as they occur
vector to string
Find out Binomial coefficient
Generate vector according to sign of vector
Average speed for the entire trip
MATLAB Basic: rounding
Is it column vector?
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