What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
First non-zero element in each column
Test if two numbers have the same digits
Basic arrays operations.
Check that number is whole number
Volume of a box
Find out of matrix transpose Complex conjugate
Solve Linear equations
Find out sum and carry of Binary adder
Append two matrix as shown below example
MATLAB Basic: rounding
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