On Monday, October 1, 2018 at 11:47:47 AM UTC, Bruno Marchal wrote: > > > On 30 Sep 2018, at 16:30, Philip Thrift <cloud...@gmail.com <javascript:>> > wrote: > > > > On Sunday, September 30, 2018 at 4:50:01 AM UTC-5, Bruno Marchal wrote: >> >> [Re:] forcing theory in set theories with classes. >> >> >> Bruno >> >> >> > Do you follow the work of Joel David Hamkins (forcing applied to > set-theoretic "multiverse", etc.) > > (I have a basic idea of a type-theoretic parallel to this.) > > *The set-theoretic multiverse* > https://arxiv.org/abs/1108.4223 > > Joel David Hamkins > @JDHamkins > Professor of Logic, University of Oxford, and Sir Peter Strawson Fellow in > Philosophy, University College Oxford. Formerly of New York. > http://jdh.hamkins.org > > > The math is interesting, and could be of some use, but it is a priori far > too much Aristotelian to be coherent with the mechanist hypothesis. That > should follow “easily” from the result described in most of my papers on > this subject. The author does not seem aware of the mind-body problem, > which put extreme constraints on what the physical reality can come from. > Even Peano arithmetic, although integral part of the notion of observer, is > too much rich for the ontology, where not only the axiom of infinity is too > strong, >
*Since you want to banish the concept of infinity from mathematics, how would you define, say, the limit of an "infinite" series? How would you even discuss this series in the context of finite mathematics? AG* > but even the induction axioms are too strong. > > Pragmatically, sets and typed lambda terms or typed combinators can indeed > be very useful. > > Bruno > > > > > > > > > - pt > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to everything-li...@googlegroups.com <javascript:>. > To post to this group, send email to everyth...@googlegroups.com > <javascript:>. > Visit this group at https://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
