stackoverflow February 17, 2026 Rep: 121

Defining a Sage vector subspace by modifying the basis of another subspace gives unexpected results

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February 17, 2026 Score: 2 Rep: 581 Quality: Low Completeness: 40%


F = GF(2)
V = VectorSpace(F, 2)
u = matrix(F, [[1, 1], [0, 1]])
v1 = vector(F, [0, 1])
V1 = V.subspace([v1])
uV1 = V.subspacewithbasis([u*v for v in V1.basis()])

Try to use subspace with basis to preseve your basis and prevent transformation into RREP in sage

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Defining a Sage vector subspace by modifying the basis of another subspace gives unexpected results

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