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2015-06-24 16:16:15 -0500 | commented answer | Multiplying matrices with different parents? Thank you for looking into this for me! As a new user, I'm glad to know it wasn't something ridiculous on my part. Also, thanks for the suggestion to use the polynomial ring. That will get me through what I need to do. |

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2015-06-24 11:44:09 -0500 | commented answer | Sage is not returning all solutions to equations modulo n Thanks! This will fix my current problem, but I am still concerned for when I use larger matrices, and/or a different modulus. If anyone has ideas on a really efficient way to do this in general, I would love to hear them. |

2015-06-24 11:39:06 -0500 | asked a question | Multiplying matrices with different parents? I want to conjugate a symbolic matrix, Sigma, by a matrix, garbage, over Z/9Z. If I define both matrices as symbolic matrices, I get the right answer. If I define garbage over Z/9Z, I get confusing answers. Can anyone explain my results? |

2015-06-24 11:05:16 -0500 | asked a question | Sage is not returning all solutions to equations modulo n I am trying to find all 2x2 matrices $S$ over $Z/9Z$ such that $S^3=I$, where I is the identity matrix. I am currently using the following procedure: The list of solutions (there are 207) I receive does not include |

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