Well, that's just exactly the point of my message. :) On Tue, Apr 12, 2011 at 4:27 PM, Ralf Hemmecke <[email protected]> wrote: >> Anyway, what do you think of the proposal to implement '-' in >> NonNegativeInteger such that >> >> (1-2)$NNI >> >> would return 0? Does this mean then that NonNegativeInteger could be >> considered an AbelianGroup? > > For which purpose do you need such a subtraction? > Programmers are lazy, and I guess, such a definition might lead to bugs that > are hard to detect. > Why do you think that turns NNI into a AbelianGroup? What's the inverse of > 2? > > Ralf > > -- > You received this message because you are subscribed to the Google Groups > "FriCAS - computer algebra system" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/fricas-devel?hl=en. > >
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