Re: [Epigram] Definitional equality in observational type theory

2007-01-25 Thread Thorsten Altenkirch
Hi Robin, thank you for your comments. Indeed we are currently revising this paper, hence your comments are especially welcome. I've been reading "Towards Observational Type Theory". I'm new to type theory, so I have not been able to understand big chunks of the paper; hopefully as I read wi

Re: [Epigram] Definitional equality in observational type theory

2007-01-25 Thread Wouter Swierstra
Hi Robin, I just saw Thorsten answered your e-mail. I'd better finish what I started though. I'm not an expert on OTT, but here are a few thoughts. The "real" rule for coercion is the one on page 3. It doesn't require the types to be definitionally equal. Section 5 mainly speculates on a

Re: [Epigram] Definitional equality in observational type theory

2007-01-25 Thread Conor McBride
Hi Robin I was just about to reply when I noticed Thorsten had... Robin Green wrote: I've been reading "Towards Observational Type Theory". I'm new to type theory, so I have not been able to understand big chunks of the paper; hopefully as I read wider I'll understand more of it. However, one