I think as a first step I'll only implement the additional argument for the two methods "is_field" and "is_integral_domain".
For the other suggestion, namely to allow the user to assert that a ring is in fact a field, would the following be the "right" way to implement this? 1. Add a new attribute to the ring class, say IS_FIELD, initialised to None, 2. Implement "assert_field(check)" to set IS_FIELD = check, 3. Change "is_field" such that (ignoring the issue about raising an exception or returning False) if IS_FIELD is None it should behave as now and otherwise it should return the value of IS_FIELD. Many thanks, Sebastian --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
