, which could be either a sequence or a single attribute.
i1 : R = CC[x,y];
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i2 : S = {x^2-1,y^2-1};
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i3 : T = {x^2+y^2-1, x*y};
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i4 : track(S,T,{(1,1),(1,-1)})
o4 = {{{1, 1.22819e-15}}, {{-4.40616e-16, -1}}}
o4 : List
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i5 : getSolution 0
o5 = ({1, 1.22819e-15}, REGULAR, 1, .5, 11)
o5 : Sequence
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i6 : getSolution(0, SolutionAttributes=>LastT)
o6 = 1
o6 : RR (of precision 53)
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i7 : getSolution(1, SolutionAttributes=>(Coordinates, SolutionStatus, RCondition))
o7 = ({-4.40616e-16, -1}, REGULAR, .5)
o7 : Sequence
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