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2014-01-20 16:53:00 +0100 received badge  Student (source)
2014-01-20 10:13:47 +0100 asked a question A bug with solve()?

I'm trying to solve a toy linear system. Why does the result depend on the order of variables and on the repetition of the equations?

sage: var("x,y")
(x, y)
sage: solve([y==0],x,y)
([], [])
sage: solve([y==0],y,x)
([y == 0], [1])
sage: solve([y==0,y==0],x,y)
[[x == r3, y == 0]]