<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Apr 23, 2022, at 3:25 PM, Henry Laxen <nadine.and.henry@pobox.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span></span><br><span>Dear Group,</span><br><span></span><br><span>Many years ago I read a fascinating article which I can't seem to find</span><br><span>anymore. It was about writing down (in english) the numbers from one to</span><br><span>a billion? and being able to retrieve the nth letter. ie:</span><br><span></span><br><span>onetwothreefourfive...ninehundredninetymillion....ninetynineonebillion</span><br><span></span><br><span>I remember it used near semi rings and automatic differentiation, but no</span><br><span>matter how I use those words to search (both google and duckduck) I</span><br><span>can't find it. Do any of you have a pointer. I believe the code was</span><br><span>written in haskell too.</span><br><span></span><br><span>Best wishes,</span><br><span>Henry Laxen</span><br></div></blockquote><div><br></div><div>One of my all-time favorites, too!</div><div><br></div><div><a href="http://conway.rutgers.edu/~ccshan/wiki/blog/posts/WordNumbers1/">http://conway.rutgers.edu/~ccshan/wiki/blog/posts/WordNumbers1/</a></div><div><br></div><div>Anthony</div><div><br></div></body></html>