Ralf Hemmecke wrote: > > > BTW: The adjective "natural" is not my invention, it is > > established terminology. > > Can you give a link to the literature. I've never heard about "natural > addition" during my lecture on ordinals and cardinals. >
My source is Kuratowki and Mostowski book about set theory (I have Polish version, but there is English translation). I do not think it is available online. Short info: http://en.wikipedia.org/wiki/Ordinal_arithmetic#Natural_operations -- Waldek Hebisch [email protected] -- 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.
