Editing Knuth reward check (section)

==Amount==
In the preface of each of his books and on his website,<ref>See [http://sunburn.stanford.edu/~knuth/books.html Books in Print by Donald E. Knuth] {{webarchive|url=https://web.archive.org/web/20060901073059/http://sunburn.stanford.edu/~knuth/books.html |date=2006-09-01 }}</ref> Knuth offers a reward of $2.56 ([[USD]]) to the first person to find each error in his published books, whether it be technical, typographical, or historical. Knuth explains that $2.56, or 256 cents, corresponds to one [[hexadecimal]] dollar.<ref>[http://sunburn.stanford.edu/~knuth/faq.html Frequently Asked Questions] {{webarchive|url=https://web.archive.org/web/20120210185732/http://sunburn.stanford.edu/~knuth/faq.html |date=2012-02-10 }} on [http://sunburn.stanford.edu/~knuth/ Don Knuth's webpage]   .</ref> "Valuable suggestions" are worth 32 cents, or {{frac|1|8}} the value of an error (0.2 hexadecimal dollars or 20 hexadecimal cents). In his earlier books a smaller reward was offered. For example, the 2nd edition of ''[[The Art of Computer Programming]], Volume 1'', offered $2.00.

The reward for coding errors found in Knuth's [[TeX]] and [[Metafont]] programs (as distinguished from errors in Knuth's books) followed an audacious scheme inspired by the [[wheat and chessboard problem]],<ref>{{MathWorld|title=Wheat and Chessboard Problem|urlname=WheatandChessboardProblem}}</ref> starting at $2.56, and doubling every year until it reached $327.68.<ref name="ams_fea"/> Recipients of this "sweepstakes" reward include Chris Thompson (Cambridge) and [[Bogusław L. Jackowski]] (Gdańsk),<ref>{{Cite web|url=http://www.uni-giessen.de/hrz/tex/more_info/info/mailarchiv/mutex.1995/msg00147.html|archive-url=https://web.archive.org/web/20051120141630/http://www.uni-giessen.de/hrz/tex/more_info/info/mailarchiv/mutex.1995/msg00147.html |url-status=dead |title=Installation of Knuth's 1995 release|archive-date=November 20, 2005}}</ref> and also Peter Breitenlohner on 20 March 1995.<ref>[http://www.tug.org/TUGboat/Articles/tb17-1/tb50knut.pdf TUG'95: Questions and Answers with Prof. Donald E. Knuth] {{Webarchive|url=https://web.archive.org/web/20061110181824/http://www.tug.org/TUGboat/Articles/tb17-1/tb50knut.pdf |date=2006-11-10 }} and Ch 34 of ''Digital Typography''</ref>

Each check's memo field identifies the book and page number. 1.23 indicates an error on page 23 of Volume 1. (1.23) indicates a valuable suggestion on that page. The symbol [[theta|Θ]] denotes the book ''[[Things a Computer Scientist Rarely Talks About]]'', KLR denotes the book ''Mathematical Writing'' (by Knuth, Larrabee, and Roberts), GKP and CM denote the book ''[[Concrete Mathematics]]'' (by Graham, Knuth, and Patashnik), f1 denotes fascicle 1, CMT denotes the book ''Computer Modern Typefaces'', DT denotes the book ''Digital Typography'', SN denotes ''Surreal Numbers'', CWEB denotes the book ''The CWEB System of Structured Documentation'', DA denotes the book ''Selected Papers on Design of Algorithms'', FG denotes the book ''Selected Papers on Fun and Games'', and MM denotes the book ''MMIXware - A RISC Computer for the Third Millennium''.