/**
* Returns a constant function of specified value.
*
* @param value the value returned by this function.
* @return the corresponding constant function.
*/
@SuppressWarnings("unchecked")
public static <R extends Ring<R>> Constant<R> valueOf(R value) {
Constant<R> cst = FACTORY.object();
cst._termToCoef.put(Term.ONE, value);
return cst;
}
