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单词 NthDerivativeOfADeterminant
释义

n’th derivative of a determinant


Let A=(ai,j) be a d×d matrix whose entries are real functions of t. Then,

dndtndet(A)=n1++nd=n(nn1,n2,,nd)πSdsgn(π)i=1ddnidtniai,π(i)=n1++nd=n(nn1,n2,,nd)det(dn1dtn1a1,1dn1dtn1a1,2dn1dtn1a1,ddnddtndad,1dnddtndad,2dnddtndad,d)

where (nn1,n2,,nr) is the multinomial coefficientDlmfMathworldPlanetmath, Sd is the symmetric groupMathworldPlanetmathPlanetmath of permutationsMathworldPlanetmath and sgn(π) is the sign of apermutation π.

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更新时间:2025/5/4 6:56:14