toAffineChart(ZZ,List) -- coordinates of a point in the projective space in an affine chart

Synopsis

• Function: toAffineChart

• Usage:

  y = toAffineChart(i,x)

• Inputs:
  • i, an integer, the number of the standard chart
  • x, a list, projective coordinates of a point
• Outputs:
  • y, a list, coordinates of x in the i-th affine chart

Description

i1 : toAffineChart(2,{1,2,3,4,5,6}) 

      1  2  4  5
o1 = {-, -, -, -, 2}
      3  3  3  3

o1 : List

i2 : toAffineChart(2,{1,2,0,4,5,6}) 

o2 = infinity

o2 : InfiniteNumber

Caveat

See also

• areEqual -- determine if solutions are equal