NAGtrace(ZZ) -- set the trace level in NumericalAlgebraicGeometry package

Synopsis

• Function: NAGtrace

• Usage:

  a = NAGtrace b

• Inputs:
  • an integer, b, the new level
• Outputs:
  • a, the old level

Description

• 0 -- silent
• 1 -- progress and timings
• 2 -- more messages than 1

• . = regular solution found
• S = singular solution (or encountered a singular point on the path)
• I = a homotopy path diverged to infinity
• M = minimum step bound reached

i1 : R = CC[x,y];

i2 : S = {x^2-1,y^2-1};

i3 : T = {x^2+y^2-1, x+y};

i4 : NAGtrace 1

o4 = 0

i5 : track(S,T,{(1,1),(1,-1),(-1,1),(-1,-1)})

.M.MSetup time: 0
Computing time:0

o5 = {{.707107, -.707107}, [M,t=.465282], {-.707107, .707107}, [M,t=.465282]}

o5 : List