**ladkin@kestrel.ARPA (Peter Ladkin)** (07/28/87)

In article <853@daimi.UUCP>, jnp@daimi.UUCP (J|rgen N|rgaard) writes: > Zermelo Fraenkels axioms for sets (should) prevent(s) sets to be defined > that way. A reference might be North Hollands Handbook of ... mathematics > (I think it is called). Handbook of Mathematical Logic, edited by Barwise, published by North-Holland. An excellent reference for logic in general. Another one for Set Theory in particular is Fraenkel/Bar-Hillel/Levy's Foundations of Set Theory (a new edition is in print, and so the author list might have changed for this). peter ladkin ladkin@kestrel.arpa