2014-07-15 18:25:12 +0100 | commented answer | How to determine the coefficients of a polynomial when they depend on variables? Thank you very much! This answer provides a good solution both to my general question and a simple solution to my specific problem (since in my case I'm really just dealing with a scalar linear function of one set of variables with coefficients depending on another set of variables). |

2014-07-15 18:22:54 +0100 | commented question | How to determine the coefficients of a polynomial when they depend on variables? Thank you! |

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2014-07-14 06:02:42 +0100 | commented question | How to determine the coefficients of a polynomial when they depend on variables? I'm not sure how to display the asterisks as literal asterisks... |

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2014-07-14 05:58:46 +0100 | asked a question | How to determine the coefficients of a polynomial when they depend on variables? Suppose that EXP2 is a polynomial expression in the variables X_1,X_2,...,X_n with coefficients that depend on the variables B_1,B_2,...,B_m. Suppose EXP1 is an expression equal to EXP2, but scrambled. Given EXP1, how can I automatically obtain EXP2? For example, if I have a=var('a') b=var('b') c=var('c') d=var('d') e=var('e') eqn=a==b how can I automatically rewrite a as a polynomial in b and c, so that I get an equation that looks like a==b |

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