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From: Katalin Sinkov <lispstylist@gmail.com>
Newsgroups: gmane.emacs.help
Subject: Re: How to cast an imperative loop into a readable recursive
	function ?
Date: Thu, 2 Dec 2010 19:22:46 -0800 (PST)
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On Dec 2, 7:18=A0pm, Paul Rubin <no.em...@nospam.invalid> wrote:
> Katalin Sinkov <lispstyl...@gmail.com> writes:
> > I am thinking of how McCarthy wrote all those difficult concepts
> > nicely as recursive functions. He dissected a problem ingeniously to
> > not have to iterate.
>
> If you like mathematical treatments, you might look for some of Richard
> Bird's papers on program refinement.

math would be an overkill and not needed. its issue of programming
style.