Routh-Hurwitz Criterion, Special Cases

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This video presents two special cases that you can encounter when filling out the Routh Array. The first case is when there is a zero in a row with at least one non-zero element following it, and the second case is when there is an entire row of zeros. I explain how to continue filling out the Routh Array for each of these cases and provide a little insight into what they mean for the system stability.
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Hui, I want to ask a question that at 7:34, you said, To find the powers of auxiliary polynomial, begin with the power of s that starts the row and skip every other power until you reach the end of the row. My question is that either we have to just skip every other power of s until we reach the end of row or we also have to skip every entry in between until we reach the end of row?

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Suppose you start forming Auxiliary equation for s^2 row then in that row only even power of S terms will come, so say your row is like this S^2 5 6 then the corresponding Auxiliary equation will be 5s^2 + 6s^0 =0 Hope it helps!!

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What if the row goes like this: s^2| 6 5 4 0

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