On 18/02/14 14:31, sahin...@gmail.com wrote: > TypeError: unsupported operand parent(s) for '*': 'Real Field with > 53 bits of precision' and 'Multivariate Polynomial Ring in x1, x2, > x3, x4, x5, x6, x7, x8 over Number Field in I with defining > polynomial x^2 + 1'
This means that you are mixing elements from * the 'Real Field with 53 bits of precision' and * 'Multivariate Polynomial Ring in x1, x2, x3, x4, x5, x6, x7, x8 over Number Field in I with defining polynomial x^2 + 1' which you shouldn't do. In particular: 3.5*x2 is your problem. Replace 3.5 by 7/2 and you are good to go. Cheers, Martin PS: Those error messages are meant to be helpful regardless of how scary they might look :) You can also try to reduce your input in order to figure out which part exactly triggers the error.
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