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sortSolutions(List) -- sort the list of solutions

Synopsis

Description

The sorting is done lexicographically regarding each complex n-vector as real 2n-vector. The output format of track and solveSystem is respected.
The parts of coordinates are considered equal if within Tolerance
i1 : R = CC[x,y];
i2 : s = solveSystem {x^2+y^2-1, x*y}

o2 = {{{9.82992e-16+1.47427e-15*ii, -1}}, {{-1, -1.22163e-15-3.0303e-16*ii}},
     ------------------------------------------------------------------------
     {{1, 1.15918e-15+3.13438e-16*ii}}, {{-9.82992e-16-1.47427e-15*ii, 1}}}

o2 : List
i3 : sortSolutions s

o3 = {{{-1, -1.22163e-15-3.0303e-16*ii}}, {{9.82992e-16+1.47427e-15*ii, -1}},
     ------------------------------------------------------------------------
     {{-9.82992e-16-1.47427e-15*ii, 1}}, {{1, 1.15918e-15+3.13438e-16*ii}}}

o3 : List