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answered 2012-10-19 09:34:39 +0100
Do you need this?
sage: v = vector(QQ, [1,1]) sage: w = vector(QQ, [3,3]) sage: v; w (1, 1) (3, 3) sage: v = copy(w) sage: v; w (3, 3) (3, 3) sage: w = 22 sage: v; w (3, 3) 22