Roots of a cubic polynomial: Difference between revisions
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=={{header|J}}==
Using J's [[j:Vocabulary/pdot|polynomial primitive]] for most of the heavy lifting here. Also using J's [[j:Vocabulary/dot|generalized determinant]] to find the characteristic polynomial (first turning each element of the matrix into a polynomial then finding the determinant of the result). See also [[j:Doc/Articles/Play141|Oh, No, Not Eigenvalues Again!]]:
Implementation:
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