This short book has just been published online by a well-known Ukrainian mathematician: https://arxiv.org/abs/2006.01613
This paragraph from the introduction made me think this book might be of interest to some of you: "The legal use of classes in NBG will allow us to discuss freely Conway’s surreal numbers that form an ordered field No, which is a proper class and hence is not “visible” in ZFC. Also the language of NBG allows to give natural definitions of some basic notions of Category Theory: category, functor, natural transformation, which is done in the last part of this book." Do note that the book contains, as expected, an introduction to ordinals and to cardinals. Best, Joao Marcos -- http://sequiturquodlibet.googlepages.com/ -- LOGICA-L Lista acadêmica brasileira dos profissionais e estudantes da área de Lógica <logica-l@dimap.ufrn.br> --- Você está recebendo esta mensagem porque se inscreveu no grupo "LOGICA-L" dos Grupos do Google. Para cancelar inscrição nesse grupo e parar de receber e-mails dele, envie um e-mail para logica-l+unsubscr...@dimap.ufrn.br. Para ver esta discussão na web, acesse https://groups.google.com/a/dimap.ufrn.br/d/msgid/logica-l/CAO6j_LhwtFoCNoDnHMUa_9XyLx%3D8R9K4rmyiB-mB1%2BDUgJ-0yQ%40mail.gmail.com.
