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2015-08-27 15:40:13 +0200 | commented answer | Inverses of matrices of Laurent polynomials Thanks for the answer. I don't think it entirely answers my question. In my case, there is a way to obtain a matrix over the desired ring as one could try to coerce all entries (even though apply_map doesn't work for whatever reason). Clearly though, that's a very inelegant way of doing it, and so I was looking for the "correct" way to do it. |

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2015-08-25 12:16:00 +0200 | asked a question | Inverses of matrices of Laurent polynomials This question is rather similar in spirit to my previous question in that it's about figuring out how to "correctly" manipulate matrices of polynomials, ensuring that everything stays in the right rings. In this case, I have a matrix, all of whose elements are of the form Desired output: What would have been the correct way to obtain what I want? Using |

2015-08-18 16:57:25 +0200 | commented answer | Eigenvalues of matrices of Laurent polynomials Nifty. Hope that one goes through. I've accepted the other answer as it does the job for now. |

2015-08-18 16:56:22 +0200 | commented answer | Eigenvalues of matrices of Laurent polynomials Thanks for the answer. I'd upvote both of them if I had the karma. |

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2015-08-14 17:04:18 +0200 | commented answer | Eigenvalues of matrices of Laurent polynomials Thanks for the answer. That almost works. If I replace the '2' of the example by a non-real, though, I get a TypeError instead. Can anything be done about that? |

2015-08-14 16:26:16 +0200 | asked a question | Eigenvalues of matrices of Laurent polynomials Say that I have a matrix whose entries are univariate Laurent polynomials over complex numbers. In that case, I can substitute the variable for non-zero complex numbers to obtain an ordinary complex matrix. My question is the following: what the correct way to obtain the eigenvalues of the resulting complex matrix? My first guess was to do something like the following which just throws a NotImplementedError: |

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