numgens(Subring) -- Returns the number of generators of a subring.

Synopsis

• Function: numgens

• Usage:

  n = numgens subR

• Inputs:
  • subR, an instance of the type Subring,
• Outputs:
  • n, an integer, the number of generators of subR.

Description

i1 : gndR = QQ[x,y,z];

i2 : subR = subring({x^2, y^2, z^2});

i3 : numgens subR

o3 = 3

See also

• generators(Subring) -- Returns the generators of a subring as a one-row matrix.
• ambient(Subring) -- Returns the ambient ring (ring containing the generators) of a subring.
• ring(Subring) -- Returns tensor ring