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*To*: Per Bothner <per@xxxxxxxxxxx>*Subject*: Re: arithmetic issues*From*: Thomas Bushnell BSG <tb@xxxxxxxxxx>*Date*: Tue, 25 Oct 2005 11:43:03 -0700*Cc*: srfi-77@xxxxxxxxxxxxxxxxx*Delivered-to*: srfi-77@xxxxxxxxxxxxxxxxx*In-reply-to*: <435E74B6.8070603@xxxxxxxxxxx> (Per Bothner's message of "Tue, 25 Oct 2005 11:08:54 -0700")*References*: <20051021145326.816C11B77BB@xxxxxxxxxxxxxxxxxxxxx> <20051022232548.5A2971B77BB@xxxxxxxxxxxxxxxxxxxxx> <873bmtxdnm.fsf@xxxxxxxxxxxxxxxxx> <20051023181854.4E7DD1B77BB@xxxxxxxxxxxxxxxxxxxxx> <871x2cowe8.fsf@xxxxxxxxxxxxxxxxx> <20051023195403.A50AF1B77BB@xxxxxxxxxxxxxxxxxxxxx> <435BEC21.60509@xxxxxxxxxxxx> <20051023205012.BFD241B77BB@xxxxxxxxxxxxxxxxxxxxx> <87zmoz27dg.fsf@xxxxxxxxxxxxx> <87hdb7kgmk.fsf@xxxxxxxxxxxxxxxxx> <87k6g3zw34.fsf@xxxxxxxxxxxxx> <871x2bkfj7.fsf@xxxxxxxxxxxxxxxxx> <8764rnu45b.fsf@xxxxxxxxxxxxx> <87br1fiv26.fsf@xxxxxxxxxxxxxxxxx> <87ll0jpu0q.fsf@xxxxxxxxxxxxx> <20051024022744.6CA581B77BB@xxxxxxxxxxxxxxxxxxxxx> <87veznbb37.fsf@xxxxxxxxxxxxx> <8764rnbaqr.fsf@xxxxxxxxxxxxxxxxx> <435C9A65.7060106@xxxxxxxxxxxxxxxx> <878xwheb2j.fsf@xxxxxxxxxxxxxxxxx> <435E74B6.8070603@xxxxxxxxxxx>*User-agent*: Gnus/5.110004 (No Gnus v0.4) Emacs/21.4 (gnu/linux)

Per Bothner <per@xxxxxxxxxxx> writes: > Thomas Bushnell BSG wrote: >> Alan Watson <a.watson@xxxxxxxxxxxxxxxx> writes: >> >>> NaNs are atoms -- they have no context or stucture, just a single >>> value. With the understandable exception of the eof object (and as >>> has been noted, this is exception is not universal), Lisps and >>> Schemes tranditionally provide read syntax for atoms. So, tradition >>> suggests that we should have a read syntax for NaNs. >> Hogwash. Procedures are atoms. > > Wrong. Closures can be modified. Where is the Scheme function which modifies closures? I was always taught that an atom is anything which is not a cons. :) At least, the Little Lisper says so. But that aside, NaNs could also have structure, as has been pointed out; it could be useful for them to come with a tag identifying their origin. Thomas

**Follow-Ups**:**Re: arithmetic issues***From:*Per Bothner

**References**:**arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Jens Axel Søgaard

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Alan Watson

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Per Bothner

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