
Chinese translation by Lai FeiPei,
Ju Ti Shu Xue
(Taipei: Dong Hua Publishing Co., 1990), xv+731pp.
Chinese translation by Chen YanWen,
Ju Ti Shu Xue
(Taipei: Ru Lin Publishing Co., 1991), xii+695pp.
Chinese translation by Xingu Zhuang,
Ju Ti Shu Xue
(Xi'an: Xi An Dian Zi Ke Ji Da Xue Chu Ban She, 1992), xii+539pp.
Chinese translation of the second edition by Zhang Mingyao and Zhang Fan,
Ju Ti Shu Xue  Ji Suan Ji Ke Xue Ji Chu (Beijing:
Turing Books, 2013),
xii+564pp.
Italian translation edited by Giovanni Monegato,
Matematica Discreta
(Milan: Editore Ulrico Hoepli, 1992), xviii+607pp.
Japanese translation by Makoto Arisawa, Michiaki Yasumura, Tatsuya Hagino,
and Kiyoshi Ishihata,
Kompyuta no Suugaku
(Tokyo: KyoritsuShuppan, 1993), xvi+606pp.
Japanese translation of the second edition by Makoto Arisawa, Michiaki
Yasumura, Tatsuya Hagino, and Kiyoshi Ishihata,
Kompyuta no Suugaku
(Tokyo: KyoritsuShuppan, 2020), xvi+624pp.
Portuguese translation by Valéria de Magalhães Iorio,
Matemática Concreta
(Rio de Janeiro: Livros Técnicos e Cientíicos Editora, 1995),
xii+477pp.
Russian translation by A. B. Khodulev and B. B. Pokhodzei, with foreword
by V. Arnol'd, Конкретная математика
(Moscow: Mir, 1999), 703pp.; see also
(Moscow: Binom, 2009).
Polish translation by P. Chrzastowski, A. Czumaj, L. Gasieniec, and M. Raczunac,
Matematyka Konkretna
(Warszawa: Polskie Wydawnictwa Naukowe, 1996), 718pp.
Hungarian translation by S. Fridli, J. Gonda, A. Kovács, L. Lakatos,
and Cs. Láng, Konkrét matematika (Budapest:
Műszaki Könyvkiadó, 1998), xvi+647pp.
Spanish translation (AddisonWesley Spain and Universidad Autónoma de
Madrid), in preparation.
French translation by
Alain Denise, Mathématiques concrètes (Paris: International Thomson Publishing, 1998), xiv+688pp.;
now distributed by
Éditions Vuibert.
Greek translation by Christos A. Kapoutsis (Athens:
Klidarithmos, 2011), 640pp.
Korean translation by Ryu Gwang, 구체 수학 (Seoul:
Insight
Press, 2018), 816pp.
Croatian translation (Zagreb: Golden Marketing), in preparation.
Macedonian translation (Skopje:
Ars Lamina), in preparation.
Introduction to the mathematics that supports advanced computer programming and the analysis of algorithms. An indispensable text and reference not only for computer scientists  the authors themselves rely heavily upon it  but for serious users of mathematics in virtually every discipline. Based on the course Concrete Mathematics taught by Knuth at Stanford University from 19701989. The second edition includes important new material about the revolutionary GosperZeilberger algorithm for mechanical summation. Complete answers are provided for more than 500 exercises.
It is to be hoped that this book succeeds in convincing many educators, not only in computer science but also in mathematics, that courses like this pay off!  J. H. Van Lint, International Reviews on Education (1990)
It is always a pleasure to look again into this book full of carefully explained and enthusiastically presented mathematics.  Volker Strehl, Mathematical Reviews (1997)
Although designed as a textbook, the book is also a valuable reference, and is loaded with useful results, especially in the exercises (all of which are solved in the back of the book). This is my goto book for any problem dealing with binomial coefficients, Fibonacci numbers, harmonic numbers, or evaluation of finite sums.  Allen Stenger, MAA Reviews (2010)
This is one of those books you keep forever, purely for its utility.  Naomi Novik, review on amazon.com (2010)
Major topics include
Available from the publisher, AddisonWesley Publishing Company.
For a list of corrections to known errors in the pre1998 printings of the second edition, you may download the 19941997 errata file in compressed PostScript format (74K bytes). This file was generated by the TeX file errata97.tex in directory ftp.cs.stanford.edu:pub/concretemath.errata.old using special macros and fonts found in that directory. Errata lists for various printings of the first edition can also be found there. See also the list of errors corrected between January 1998 and May 2013, which is in HTML format.
And here is a list of all nits that have been picked so far since the 27th printing (May 2013). An asterisk (*) marks significant technical errors that are not merely typographical:
 page 1, line 2 before the illustration
 change 'Edouard' to 'Édouard'
 page 8, line 8
 change 'only two regions per line' to 'only two regions per bent line'
 page 28, line 4
 change "quicksort" to "quicksort [209, Algorithm 5.2.2Q]"
 page 30, lines 8, 11, 17, and 25
 change 'associative law' to 'pairing law'
 page 31, line 8 from the bottom
 change 'associative' to 'pairing'
 page 33, line 11
 change 'associative law' to 'pairing law'
 page 34, line 2 from the bottom
 change 'associative law' to 'pairing law'
 page 41, line 3
 change 'associative law' to 'pairing law'
 page 60, line 8 from the bottom
 change 'associative' to 'pairing'
 page 61, line 3
 change 'associative law' to 'pairing law'
 page 63, line 4 of exercise 11
 change 'associative' to 'pairing'
 page 64, line 4 of exercise 25
 change 'associative' to 'pairing'
 page 75, line 8
 use a bigger [ before $m\in$ and a bigger ] after $/k)$
 page 77, line 2
 change 'a real number' to 'a positive real number'
 page 87, display on lines 810
 change '$k<n$' to '$k<a^2$' under the first $\sum$; and append ', integer $a$' at the end of the formula.
 page 101, line 1 of exercise 52
 change 'nonnegative real numbers $\alpha$ and $\beta$' to 'real numbers $\alpha$ and $\beta$ with $\alpha>0$ and $\alpha+\beta>0$'
 page 101, line 6 of exercise 52
 change 'rational' to 'distinct'
 page 101, last line of exercise 52
 change '$2^{k1}$' to '$2^{mk}$'
 pages 107 (bottom) and 108 (top)
 change 'Suppose there were only finitely many ... None of the' to: 'Consider any finite set of primes, say $\{P_1,P_2,\ldots,P_k\}$. Then, said Euclid, we should think about the number
$$M=P_1\cdot P_2\cdot\ldots\cdot P_k+1.$$
None of the' page 108, line 7 (in the 27th printing only)
 change 'primes numbers' to 'prime numbers'
 page 108, a new graffito
 "Oh, I see: The formula $e_1e_2\ldots e_{n1}$ means $\prod_{k=1}^{n1}e_k$, so it is equal to $1$ (an empty product) when $n=1$."
 page 109, line 13
 change '1984' to '1985'
 page 114, line 11
 change "progression:" to "progressions: When $n>0$ we have"
 page 128, line 12 from the bottom
 change "page 274" to "page 290"
 page 151, line 15 (the sequence for scriptP sub 5)
 change the second occurrence of 2/5 to 3/5
 page 178, line 10 from the bottom (the displayed formula)
 change $m\ge0$ to $m\ge1$
 page 178, line 4 from the bottom (the displayed table)
 delete the entry for $m=0$
 page 179, line 9 from the bottom
 change $m\ge6$ to $m\ge7$
 page 192, lines 2 and 3 from the bottom
 change 'rule (5.45)' to 'rule (5.44)', and change 'way:' to 'way using (5.40):'
 page 201, add new graffito in bottom half of page:
 News flash: $\ln\Bscr_t(z)=\sum_{k\ge1}{tk\choose k}z^k/(tk)$; $\ln\Escr_t(z)=\sum_{k\ge1}(tk)^{k1}z^k/k!$.
 page 287, line 3
 change $\sum_{n\ge0}$ to $\sum_{n\ge1}$
 page 288, line 4
 change 'sum of $n$th powers' to 'sum of $m$th powers'
 page 305, line 14
 omit '(This is "Halphen's theorem" [174].)'
 page 306, line 1
 change 'Thus' to 'Thus—as implicitly observed by Halphen [174]—'
 page 317, last line of exercise 76
 change '$n$ is even' to '$n>0$ is even'
 page 373, line 6
 change $P(z)$ to $\widehat P(z)$
 page 428, line 9
 enclose $\alpha^{\alpha n}(1\alpha)^{(1\alpha)n}$ in parentheses
 page 429, exercise 8.22
 change "law of conditional expectations and variances" to "law of total variance"
 page 450, in (9.27)
 add the condition ", if $f(n)$ is never zero"
 page 477, line 10
 change $R_4(n)$ to $R_4(n)+O(n^{5})$
 page 481, lines 8, 9, 10 from the bottom
 change "(The value ... constant exists.)" to: "(Stirling's original formula was actually a bit different; (9.91) is de Moivre's modification [76]. Stirling [343, p. 137] stated without proof that $e^\sigma=\sqrt{2\pi}$; we aren't quite ready to prove that fact.)"
 page 481, bottom line
 change 'approximated' to 'approximated via Euler's formula'
 page 488, bottom line
 change $k>n^{1/2+\epsilon$ to $\vert k\vert>n^{1/2+\epsilon$
 page 490, lines 1 and 2 of exercise 21
 change $O(\log n)^{2}$ to $O(\bigl((\log n)^{2}\bigr)$ and $O(\log n)^{3}$ to $O(\bigl((\log n)^{3}\bigr)$
 page 504, last line of answer 2.25
 change $\sum_{k\in K}1=\#K$ to $\sum_{k\in K}c=c\#K$
 page 510, in (9.27)
 add the condition “if $f(n)$ is never zero”
 page 514, line 4 from the bottom
 change ‘irrational’ to ‘a repeated’
 page 514, bottom line and top of page 515
 change 'rational examples' to 'examples with distinct $\alpha$'s'
 page 517, line 1
 change $\rho(2k+1)$ to $\rho(2k1)$
 page 525, new copy for answer 4.67
 M. Szegedy proved this conjecture for all large n; then R. Balasubramanian and K. Soundararajan found a complete solution. See [95, pp. 7879], [348], [55], and [19'].
 page 525, new graffito for answer 4.69
 Latebreaking news: The $10,000 prize has been won! See Kevin Ford, Ben Green, Sergei Konyagin, James Maynard, and Terence Tao, Journal of the American Mathematical Society, Volume 31 (2018), pages 65–105.
 page 552, new answer 6.32
 $\sum_{0\le k\le m}k{n+k\brace k}={m+n+1\brace k}{n\brace1}= {m+n+1\brace k}[n=1]$ generalizes (6.22) to negative $n$; and $\sum_{k\le n}{k\brace m}(m+1)^{nk}={n+1\brace m+1}$ generalizes (6.20) to negative $m$, $n$.
 page 553, line 3 of answer 6.44
 change $(mk,m)$ to $(k,mk)$
 page 577, line 4 of answer 8.19
 change "when $a,b\ge0$" to "when $X_1$ and $X_2$ are independent"
 page 580, replacement for lines 2 and 3 of answer 8.31
 $A=1$; $B=\half zA+\half zC$; $C=\half zB+\half zD$; $D=\half zC+\half zE$; $E=\half zD+\half zA$. (And the following lines are revised to fit this better approach.)
 page 580, line 3 from the bottom
 change $1/x^{98}(42xx^2)$ to $1/(x^{98}(42xx^2))$
 page 593, in answer 9.19
 change 2.928968256 to 2.928968258 and 3628712.4 to 3628800.05
 page 605, new reference
 19' R. Balasubramanian and K. Soundararajan, “On a conjecture of R. L. Graham,” Acta Arithmetica 75 (1996), 138.
 page 610, in reference 83
 change '147223' to '145223'
 page 617, line 4
 change '305.' to '306.'
 page 628, in reference 330
 change "http://www.research.att.com/~njas/sequences" to "Since 2011, http://oeis.org"
 page 629, in reference 343
 insert a crossreference to page 481 in the margin; and add this: Annotated translation by Ian Tweddle, SpringerVerlag, 2003.
 page 638, replacement for associative law entry
 associative law, 561
 page 638, new entry
 Balasubramanian, Ramachandran, 525, 605.
 page 644, new entry
 Ford, Kevin Barry, 525
 page 644, Franel entry
 Franel, Jérôme, 549, 614
 page 645, Ron Graham entry
 add page 605
 page 646, new entry
 Green, Ben Joseph, 525
 page 647. new entry
 Konyagin, Sergei Vladimirovich, 525
 page 647, Lagrange entry
 Lagrange, Joseph Louis (= De la Grange Tournier, Giuseppe Ludovico (= Luigi)), 470, 621, 635
 page 647, Landau entry
 change '622' to '621–622'
 page 648, new entry
 Maynard, James
 page 650, Pacioli entry
 Pacioli, Luca Bartolomeo de, 614
 page 650, new entry
 pairing law, 30, 33, 41, 61, 64
 page 652, left column
 regular expressions, 326
 page 653, new entry
 Soundararajan, Kannan, 525, 605.
 page 655. new entry
 Tao, Terence ChiShen, 525
 page 655, new entry
 Tweddle, Ian, 629
With these corrections, the authors hope that the book is now errorfree. But (sigh) it probably isn't. Therefore I will gratefully deposit 0x$1.00 ($2.56) to the account of the first person who finds and reports anything that remains technically, historically, typographically, or politically incorrect. Please send suggested corrections to knuthbug@cs.stanford.edu, or send snail mail to
Prof. D. Knuth
Computer Science Department
Gates Building 4B
Stanford University
Stanford, CA 943059045 USA.
In either case please include your postal address, so that I can mail an official certificate of deposit as a token of thanks for any improvements to which you have contributed.
I may not be able to read your message until many months have gone by, because I'm working intensively on The Art of Computer Programming. However, I promise to reply in due time.
DO NOT SEND EMAIL TO KNUTHBUG EXCEPT TO REPORT ERRORS IN BOOKS! And if you do report an error via email, please do not include attachments of any kind; your message should be readable on brandX operating systems for all values of X.
SPECIAL NOTE TO THE SPEAKERS OF FRENCH AND OTHER EXOTIC LANGUAGES: Numerous quotations and bibliographic citations found in this book have been copied verbatim from the original sources. If you believe you have found a typographic error, you must prove it by showing that the original was incorrectly transcribed; believe it or not, your language has changed over the years, just as English has.
Midterm and final exams from the last two times I taught this course at Stanford (1988 and 1989) are now available, together with the answers, as compressed PostScript files. The teaching assistants who helped to prepare these exams were Sheralyn Listgarten and Sridhar Raman (1988); Alan Hu and Robert Kennedy (1989).