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2015-10-06 19:34:03 +0100 | asked a question | non-negative integer relations on vertices I would like to check whether there is a nonnegative integer relations between the vertices of my lattice polytope. Here is my code (I copied from sage math document): Obviously, the sum of the first four vectors is zero vector. However, sage returns an error:
I would like to understand the reason. Is there some obvious thing I am missing? Interestingly, if I remove the last vertex from the list, then it gives the expected relation. |

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