ring(CoincidentRootLocus) -- get the ring of a coincident root locus

Synopsis

• Function: ring

• Usage:

  ring X

• Inputs:
  • X, an instance of the type CoincidentRootLocus
• Outputs:
  • a ring, the coordinate ring of the target of the map of X

Description

i1 : X = coincidentRootLocus {3,2}

o1 = CRL(3,2)

o1 : CoincidentRootLocus

i2 : ring X

o2 = QQ[t , t , t , t , t , t ]
         0   1   2   3   4   5

o2 : PolynomialRing

i3 : X' = coincidentRootLocus({3,2},ZZ/3331,Variable=>x)

o3 = CRL(3,2;ZZ/3331;'x')

o3 : CoincidentRootLocus

i4 : ring X'

      ZZ
o4 = ----[x , x , x , x , x , x ]
     3331  0   1   2   3   4   5

o4 : PolynomialRing

See also

• coefficientRing(CoincidentRootLocus) -- get the coefficient ring
• map(CoincidentRootLocus) -- the map associated to a coincident root locus
• target(RationalMap) -- coordinate ring of the target for a rational map