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Re: [Scheme-reports] Implied equality

On Sat, Dec 22, 2012 at 10:20 PM, I wondered:
> What is the equality/equivalence implied by the re-use of an argument name?  Did I overlook that in the draft?  I think it ought to be stated somewhere.

On Sat, Dec 22, 2012 at 17:12:16 +0100 Alex Shinn replied: 
> The => notation is described in section 1.3.4,
> and reads as "evaluates to".
> It is not defined formally,
> but goes on to say:
>   [expression] evaluates, in the initial environment,
>   to an object that can be represented externally
>   by the sequence of characters [result]
> so one can assume
> the objects must be written the same.

But in that case the equations for make-polar are false, aren't they?  z may be exact on input and inexact on output.

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