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Timeline for What's wrong with the surreals?

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May 26, 2017 at 13:57 comment added JSCB This paper (arxiv.org/abs/1307.7392) gives a new definition of integration on surreals, so that $\int^x_0 e^t dt=e^x-1$. The authors suggests that further investigations into evaluation of series are needed for a more complete theory on integration.
Jun 24, 2011 at 1:40 comment added David Fernandez-Breton Gonshor's book is quite elegant and starts defining surreal numbers right away as sequences on {-,+}. Of course you need to define ordinals first, but for me that's not a disadvantage (maybe for Conway it is, since he seems to try to avoid to "restrict" himself to a particular axiomatic system such as ZFC, assuming that it's possible to even make sense of such a viewpoint).
Jun 24, 2010 at 22:25 history answered user2498 CC BY-SA 2.5