Talk:Test integerness: Difference between revisions

:: --[[User:Paddy3118|Paddy3118]] ([[User talk:Paddy3118|talk]]) 16:11, 25 June 2014 (UTC)

 

 

: If you wish to test whether a complex number is an integer you also need to be careful to state what you mean by that term. A complex integer, more usually termed a ''Gaussian integer'' or an element of the ring '''Z'''[''i''], is an ordered pair of elements (''re'', ''im'') of the ring '''Z''', the ring of integers. The sub-ring which has ''im'' = 0 is isomorphic to '''Z'''. My ''guess'' is that the latter set is what is meant when the task is extended to treat complex numbers but this should be made explicit.