This page is part of the web mail archives of SRFI 70 from before July 7th, 2015. The new archives for SRFI 70 contain all messages, not just those from before July 7th, 2015.
1. I believe that every numerical value should have an external representation. There are many different NaNs (the only requirement is that the biased exponent field should be a maximum and the mantissa field be nonzero), so it should be possible to specify or determine this information about a NaN from its external representation. 2. If Scheme really wants to get serious about floating-point arithmetic, one should be able to specify the precision of floating- point operations. "One-precision-fits-all" doesn't cut it for serious code. Brad