Function create_ring

Singular/dyn_modules/python/util.py:5–28

(char=0, nvars=1, varNames=None, ordering="dp", degvec=None, register=None)

singular=SingularGlobalsProxy()

def create_ring(char=0, nvars=1, varNames=None, ordering="dp", degvec=None, register=None):
  if not varNames:
    varNames=["x("+str(i)+")" for i in range(1,nvars+1)]
  else:
    nvars=len(varNames)
  if not degvec:
    degvec=IntVector()
    for i in range(0,nvars):
      degvec.append(1)
  modulweights=IntVector()
  modulweights.append(0)
  l=[char,varNames,[[ordering,degvec],["C",modulweights]], Ideal()]
  res=singular.ring(l)
  if register is None:
    return res
  else:
    old_ring=Ring()
    res.set()
    for i in range(nvars):
        v=singular.var(i+1)
        register[str(v)]=v

    old_ring.set()
    return res


class EquivalenceRelation(object):