High Quality Content by WIKIPEDIA articles! The defining property of the Vandermonde polynomial is that it is alternating in the entries, meaning that permuting the Xi by an odd permutation changes the sign, while permuting them by an even permutation does not change the value of the polynomial – in fact, it is the basic alternating polynomial, as will be made precise below.It thus depends on the order, and is zero if two entries are equal – this also follows from the formula, but is also consequence of being alternating: if two variables are equal, then switching them both does not change the value and inverts the value, yielding Vn = ? Vn, and thus Vn = 0 (assuming the characteristic is not 2, otherwise being alternating is equivalent to being symmetric).

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