**Type:**- Virtual Function
**Defined in:**- CU.coef2ff, CU.coef2rf or CU.coef2rn
- If the coefficient domain is a field, it returns the inverse of
`c`. It is used for making the leading coefficient of a polynomial 1. In the case where the coefficient domain is not a field (which does not occur in the current implementation) one has to make up ones mind about a reasonable return value of this function. **See also:**- Section 4.2.

Thu Sep 3 14:50:07 MDT 1998