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Weird comportment in the construction of a matrix

your = vector([0.54,0.24,0.06,0.24,0.06,0.54])

auss => vector([0.5,0.10,0.10,0.6,0.2,0.8])



data = Matrix([your,auss])


Now when I ask sage to trunkate the number of zero, not to 2, 3 or for in your & auss or in data, the effect is not the same and is no more the true data.

Also if i name a vector D1 I have an error when D_1 is safe. Why ?