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Handbook of Formal Languages
Handbook of Formal Languages von Grzegorz Rozenberg, Arto Salomaa 1. Auflage Handbook of Formal Languages – Rozenberg / Salomaa schnell und portofrei erhältlich bei beck-shop.de DIE FACHBUCHHANDLUNG Springer 1997 Verlag C.H. Beck im Internet: www.beck.de ISBN 978 3 540 60420 4 Contents of Volume 1 Chapter 1. Formal Languages: an Introduction and a Synopsis Alexandru Mateescu and Arto Salomaa ............................ 1 1. Languages, formal and natural ................................. 1 1.1 Historical linguistics ...................................... 3 1.2 Language and evolution ................................... 7 1.3 Language and neural structures ............................ 9 2. Glimpses of mathematical language theory ...................... 9 2.1 Words and languages ..................................... 10 2.2 About commuting ........................................ 12 2.3 About stars ............................................. 15 2.4 Avoiding scattered subwords .............................. 19 2.5 About scattered residuals ................................. 24 3. Formal languages: a telegraphic survey ......................... 27 3.1 Language and grammar. Chomsky hierarchy ................. 27 3.2 Regular and context-free languages ......................... 31 3.3 L Systems............................................... 33 3.4 More powerful grammars and grammar systems .............. 35 3.5 Books on formal languages ................................ 36 References ..................................................... 38 Chapter -
The Best Nurturers in Computer Science Research
The Best Nurturers in Computer Science Research Bharath Kumar M. Y. N. Srikant IISc-CSA-TR-2004-10 http://archive.csa.iisc.ernet.in/TR/2004/10/ Computer Science and Automation Indian Institute of Science, India October 2004 The Best Nurturers in Computer Science Research Bharath Kumar M.∗ Y. N. Srikant† Abstract The paper presents a heuristic for mining nurturers in temporally organized collaboration networks: people who facilitate the growth and success of the young ones. Specifically, this heuristic is applied to the computer science bibliographic data to find the best nurturers in computer science research. The measure of success is parameterized, and the paper demonstrates experiments and results with publication count and citations as success metrics. Rather than just the nurturer’s success, the heuristic captures the influence he has had in the indepen- dent success of the relatively young in the network. These results can hence be a useful resource to graduate students and post-doctoral can- didates. The heuristic is extended to accurately yield ranked nurturers inside a particular time period. Interestingly, there is a recognizable deviation between the rankings of the most successful researchers and the best nurturers, which although is obvious from a social perspective has not been statistically demonstrated. Keywords: Social Network Analysis, Bibliometrics, Temporal Data Mining. 1 Introduction Consider a student Arjun, who has finished his under-graduate degree in Computer Science, and is seeking a PhD degree followed by a successful career in Computer Science research. How does he choose his research advisor? He has the following options with him: 1. Look up the rankings of various universities [1], and apply to any “rea- sonably good” professor in any of the top universities. -
A Complete Bibliography of Publications in the Journal of Computer and System Sciences
A Complete Bibliography of Publications in the Journal of Computer and System Sciences Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 26 May 2021 Version 1.04 Title word cross-reference (s; t) [1475]. 0(n) [1160]. 1 [270]. 1 − L [1371, 924]. 12n2 [450]. 2 [3525, 3184, 2191, 1048, 3402, 1500, 3364, 2034, 2993, 834, 2473, 3101]. f2; 3g [2843]. #09111 [1814]. #AM01053M 2pn 1=3 − 2 O(n ) [1862, 1877, 1904]. #better 5X8 els [1856]. 2 [2353]. 2 [445]. 2 [1977]. 3 #better 5X8 els.pdf [1856]. #BIS [3184]. [1920, 2242, 2827, 2374, 1961, 2825, 3240, · #BIS-hardness #CSP 1071, 1133]. 43 [3620]. 4 Log2N [655]. 5=4 [3184]. ∗ 0 #econdirectM [1612]. 8 [2998]. =? [1433]. [858]. [2696, 2908, 2500, 3508]. 1 ∗ NP [1893]. #HA03022M [1860, 1875]. [1625, 3418, 1085]. [1523]. [3194]. NP[O(log n)] p ⊆ PH #HA05062N [1876]. #HA05062O [2235]. [995]. 2 [2235]. [1849, 1861]. #HA06043M [1501]. 2 [3418]. H [1565]. a [426, 289]. [1892, 1871, 1889]. #HA08111M [1846]. A[P (x); 2x; x + 1] [500]. Ax = λBx [377]. b · #P [1195, 3598, 1261, 1264]. [3253]. β [3444]. [3418]. d #praise 5X8 els.pdf [1832]. [2527, 1362, 3256, 3563]. δ [3553]. `p [2154]. #sciencejobs N [1802]. [1551, 2617, 1864, 1693]. g [3312]. h [1019]. K [1320, 2756, 191, 3494, 1300, 1546, 3286, #P [1373]. -
The EATCS Award 2020 Laudatio for Toniann (Toni)Pitassi
The EATCS Award 2020 Laudatio for Toniann (Toni)Pitassi The EATCS Award 2021 is awarded to Toniann (Toni) Pitassi University of Toronto, as the recipient of the 2021 EATCS Award for her fun- damental and wide-ranging contributions to computational complexity, which in- cludes proving long-standing open problems, introducing new fundamental mod- els, developing novel techniques and establishing new connections between dif- ferent areas. Her work is very broad and has relevance in computational learning and optimisation, verification and SAT-solving, circuit complexity and communi- cation complexity, and their applications. The first notable contribution by Toni Pitassi was to develop lifting theorems: a way to transfer lower bounds from the (much simpler) decision tree model for any function f, to a lower bound, the much harder communication complexity model, for a simply related (2-party) function f’. This has completely transformed our state of knowledge regarding two fundamental computational models, query algorithms (decision trees) and communication complexity, as well as their rela- tionship and applicability to other areas of theoretical computer science. These powerful and flexible techniques resolved numerous open problems (e.g., the su- per quadratic gap between probabilistic and quantum communication complex- ity), many of which were central challenges for decades. Toni Pitassi has also had a remarkable impact in proof complexity. She in- troduced the fundamental algebraic Nullstellensatz and Ideal proof systems, and the geometric Stabbing Planes system. She gave the first nontrivial lower bounds on such long-standing problems as weak pigeon-hole principle and models like constant-depth Frege proof systems. She has developed new proof techniques for virtually all proof systems, and new SAT algorithms. -
MAURICE NIVAT, UNE GRANDE FIGURE 89 ◦◦◦◦••◦◦ Une Brève Biographie Scientifique De Maurice Nivat 2
HOMMAGE Maurice Nivat, une grande gure Pierre-Louis Curien 1 Le texte qui suit a été rédigé en 2001, pour le volume intitulé « Merci, Maurice : a mosaic in honour of Maurice Nivat », paru comme numéro spécial de la revue Theoretical Com- puter Science, que Maurice Nivat avait fon- dée. En écrivant ce texte, je me réjouissais par avance des travaux scientifiques que Maurice continuerait de poursuivre, des combats qu’il continuerait à livrer pour la pleine reconnais- sance de notre discipline et pour son enseigne- ment « de première classe », et de la liberté qu’il aurait, sa retraite prise, pour assouvir à loisir d’autres passions : celles pour le patri- moine, pour l’ethnographie, pour le théâtre, pour les voyages... Et, en effet, Maurice a poursuivi pendant plusieurs années ses travaux en tomographie discrète. Accompagné par son épouse Paule, il a parcouru le monde en long et en large, à six reprises. Il a mené un combat acharné pour l’introduction de l’informatique dans les programmes de l’enseignement secon- daire. Maurice nous a quittés au terme d’une maladie qu’il a combattue avec un im- mense courage, continuant à lire, à s’informer, à s’enflammer pour les causes qu’il 1. Institut de recherche en informatique fondamentale (IRIF, UMR 8243), CNRS et université Paris- Diderot. 1024 – Bulletin de la société informatique de France, numéro 12, juin 2018, pp. 87–107 88 PIERRE-LOUIS CURIEN ◦◦◦◦••◦◦ défendait. Je me souviendrai de la gourmandise qu’il avait encore dans les yeux et dans le verbe pour me parler, sur son lit d’hôpital, de sa fascination pour les iguanes, alors que je revenais d’une conférence aux îles Galápagos. -
Arto Salomaa
Arto Salomaa A Pioneer of Science from Turku Arto Salomaa, A Pioneer of Science 1 / 52 Arto Arto Salomaa, A Pioneer of Science 2 / 52 Turku Cathedral Arto Salomaa, A Pioneer of Science 3 / 52 Proud of his native Turku, in particular of native \Turku language" Never left Turku permanently Proud of Finnish Sauna, in particular of his Salosauna Jealous of those who have never seen \lousy white stuff" Arto & Turku Born in Turku, 1934 Arto Salomaa, A Pioneer of Science 4 / 52 Never left Turku permanently Proud of Finnish Sauna, in particular of his Salosauna Jealous of those who have never seen \lousy white stuff" Arto & Turku Born in Turku, 1934 Proud of his native Turku, in particular of native \Turku language" Arto Salomaa, A Pioneer of Science 4 / 52 Proud of Finnish Sauna, in particular of his Salosauna Jealous of those who have never seen \lousy white stuff" Arto & Turku Born in Turku, 1934 Proud of his native Turku, in particular of native \Turku language" Never left Turku permanently Arto Salomaa, A Pioneer of Science 4 / 52 Jealous of those who have never seen \lousy white stuff" Arto & Turku Born in Turku, 1934 Proud of his native Turku, in particular of native \Turku language" Never left Turku permanently Proud of Finnish Sauna, in particular of his Salosauna Arto Salomaa, A Pioneer of Science 4 / 52 Arto & Turku Born in Turku, 1934 Proud of his native Turku, in particular of native \Turku language" Never left Turku permanently Proud of Finnish Sauna, in particular of his Salosauna Jealous of those who have never seen \lousy white stuff" Arto Salomaa, A Pioneer of Science 4 / 52 Roots in Turku Arto and his father J.E. -
Events and Languages
Arto Salomaa Professor Arto Salomaa received his Ph.D. in 1960 and has b een Professor of Mathe- matics at the UniversityofTurku since 1965. He has authored more than 400 scienti c publications in ma jor journals, as well as ten b o oks, some of whichhave app eared also in French, German, Japanese, Romanian, Russian, Vietnamese and Chinese transla- tions. Prof. Salomaa holds the degree of do ctor honoris causa at six universities. He has b een an invited sp eaker at numerous conferences in computer science and math- ematics, and a program committee member or chairman for ma jor computer science conferences, including STOC, ICALP,MFCS, FCT. Prof. Salomaa was EATCS Pres- ident 1979-85 and is currently the editor-in-chief of the EATCS Monograph Series published by Springer-Verlag, as well as an editor of eight international journals of Computer Science. Festival conferences \Salo days in Theoretical Computer Science" Bucharest 1992, \Salo days in Auckland" Auckland, NZ, 1994 and \Imp ortant Re- sults and Trends in Theoretical Computer Science" Graz, 1994 have b een arranged in his honor. Prof. Salomaa is a memb er of the Academy of Sciences of Finland, the Swedish Academy of Sciences of Finland and Academia Europaea 92. Currently,heisa Research Professor at the Academy of Finland and the head of the Academy's research pro ject on mathematical structures in computer science. Events and Languages Early computer science It is customary to b egin a pap er with an abstract or a summary. The purp ose of this article is to tell ab out some people and ideas in the early history of computer 254 Salomaa science, roughly up to 1970. -
Literaturverzeichnis
Literaturverzeichnis [1] Francine Berman. Edge grammars and parallel computation. In Proceedings of the Al- lerton Conference on Communication, Control, and Computing, pages 214–223, 1983. [2] Francine Berman and Gregory Shannon. Edge grammars: Formal languages and deci- dability issues. In Proceedings of the Allerton Conference on Communication, Control, and Computing, pages 921–930, 1983. [3] Francine Berman and Gregory Shannon. Representing graph families with edge gram- mars. Information Sciences, 70:241–269, 1993. [4] Francine Berman and Lawrence Snyder. On mapping parallel algorithms into parallel architectures. Journal of Parallel and Distributed Computing, 4:439–458, 1987. [5] Jean Berstel and Christophe Reutenauer. Rational Series and Their Languages. Springer-Verlag, Berlin–Heidelberg, 1988. [6] Bruno Courcelle. Graph rewriting: An algebraic and logic approach. In Jan van Leeuwen, editor, Handbook of Theoretical Computer Science, volume B, chapter 5, pages 193–242. Elsevier, 1990. [7] J. Dassow, G. Pˇaun, and A. Salomaa. On thinness and slenderness of L languages. Bulletin of the European Association for Theoretical Computer Science, 49:152–158, February 1993. Technical Contributions. [8] Jurgen¨ Dassow. Decision problems for edge grammars. In Mathematical Foundations of Computer Science 1994 (LNCS 841), pages 286–295, 1994. [9] Jurgen¨ Dassow and Gheorghe P˘aun. Regulated Rewriting in Formal Language Theory. Springer-Verlag, Berlin, 1989. [10] Frank Drewes, Annegret Habel, and Hans-J¨org Kreowski. Hyperedge replacement graph grammars. In Grzegorz Rozenberg, editor, Handbook of Graph Grammars and Computing by Graph Transformation, volume 1, pages 95–162. World Scientific, Sin- gapore, 1997. [11] Heinz-Dieter Ebbinghaus, J¨org Flum und Wolfgang Thomas. Einf¨uhrung in die ma- thematische Logik. -
News from New Zealand
News from New Zealand by C. S. Calude Department of Computer Science, University of Auckland Auckland, New Zealand [email protected] After 21 years of uninterrupted presence (this column didn’t appear in the October 2013 issue due to a clerical problem in the change of editors-in-chief) this is the last report from New Zealand. I wish to warmly thank Professor G. Rozenberg for inviting me to contribute with a column of news to the Bulletin, the other Bulletin editors-in-chief I have worked with, the eminent scientists who have accepted to be interviewed, and, last but not least, the Bulletin readers. This column includes the continuation of the interview with Professor G. Rozenberg. An edited-augmented-structured selection of interviews published in this column will appear in the book The Human Face of Computing to this year at Imperial College Press, London. 1 Scientific and Community News The latest CDMTCS research reports are (http://www.cs.auckland.ac.nz/ staff-cgi-bin/mjd/secondcgi.pl): 470. B. Khoussainov . A Quest For Algorithmically Random Infinite Structures, II 471. C.S. Calude, A. Coull and J.P. Lewis. Can We Solve the Pipeline Problem? 472. A. A. Abbott, L. Bienvenu and G. Senno. Non-uniformity in the Quantis Random Number Generator 473 C.S. Calude and M.J. Dinneen. Solving the Broadcast Time Problem Using a D-Wave Quantum Computer 474 C.S. Calude and G. Longo. Classical, Quantum and Biological Randomness as Relative Incomputability 475 T. Resnick. Sudoku at the Intersection of Classical and Quantum Computing 476 D. -
A Bibliography of Publications in Theoretical Computer Science: 2005–2009
A Bibliography of Publications in Theoretical Computer Science: 2005{2009 Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 14 October 2017 Version 1.15 Title word cross-reference `p [782]. [1183, 729]. F0 [2005]. FS [1741]. H [1823, 1585]. k [1116, 1805, 796, 803, 173, 781, 1961, 1609, 775, 1989, 178, 1310, 630, 1311, 951, 62, 1823, 1809, 2253, 2061, 2003, #CSP [2264]. #P [1788]. 1624, 953, 1226, 1306, 1290, 2007]. k>2 #P-completeness [1788]. [173]. Kmax;Kmin [541]. κ [1836]. L(2; 1) [2243, 1635]. L(d; s) [440]. l1 [961]. λ (1 + 1) [1683]. (1,λ) [115]. (18=11)n [2213]. [2281, 400, 1588, 562]. λµ [1159]. log N (α, β) [2215]. (n; k) [2392, 1557]. (n; t) [1049]. d [547]. LU [1217]. m (p; k) [467]. (r; p) [2357]. $-calculus [1275]. [1760, 1324, 2258, 1745, 1226, 1306]. µ 1 [220, 503]. 2 [187, 400, 589, 359, 101]. n [1425, 2304, 1890, 2253, 2333, 1287, 1302]. d ≥ ≤ [1909, 958, 2079, 1451]. N [1444]. n 30 2 <α 7=3 [2163]. 3 [1628, 1771]. 3:4713 6 1:75 + [2169]. = [789]. O(n ) [2243]. [2387]. 4 [2260]. 5 + [1968]. 5=2 [90]. 5=4 2 ! ∗ ; Ø(n polylogn) [1915]. O(n ) [1553]. [778]. [0; 1] [503]. [58]. [109]. 1 [1543]. -
BEATCS No 119
ISSN 0252–9742 Bulletin of the European Association for Theoretical Computer Science EATCS E A T C S Number 119 June 2016 Council of the European Association for Theoretical Computer Science President:Luca Aceto Iceland Vice Presidents:Paul Spirakis United Kingdom and Greece Antonin Kucera Czech Republic Giuseppe Persiano Italy Treasurer:Dirk Janssens Belgium Bulletin Editor:Kazuo Iwama Kyoto,Japan Lars Arge Denmark Anca Muscholl France Jos Baeten The Netherlands Luke Ong UK Lars Birkedal Denmark Catuscia Palamidessi France Mikolaj Bojanczyk Poland Giuseppe Persiano Italy Fedor Fomin Norway Alberto Policriti Italy Pierre Fraigniaud France Alberto Marchetti Spaccamela Italy Leslie Ann Goldberg UK Vladimiro Sassone UK Magnus Halldorsson Iceland Thomas Schwentick Germany Monika Henzinger Austria Jukka Suomela Finland Christos Kaklamanis Greece Thomas Wilke Germany Elvira Mayordomo Spain Peter Widmayer Switzerland Michael Mitzenmacher USA Gerhard Woeginger¨ The Netherlands Past Presidents: Maurice Nivat (1972–1977)Mike Paterson (1977–1979) Arto Salomaa (1979–1985)Grzegorz Rozenberg (1985–1994) Wilfred Brauer (1994–1997)Josep D´iaz (1997–2002) Mogens Nielsen (2002–2006)Giorgio Ausiello (2006–2009) Burkhard Monien (2009–2012) Secretary Office:Ioannis Chatzigiannakis Italy Efi Chita Greece EATCS Council Members email addresses Luca Aceto ..................................... [email protected] Lars Arge .............................. [email protected] Jos Baeten ............................... [email protected] Lars Birkedal ............................ [email protected] Mikolaj Bojanczyk .......................... [email protected] Fedor Fomin ................................ [email protected] Pierre Fraigniaud .. [email protected] Leslie Ann Goldberg ................ [email protected] Magnus Halldorsson ........................ [email protected] Monika Henzinger ................ [email protected] Kazuo Iwama ........................ [email protected] Dirk Janssens ........................ -
Lecture Notes in Computer Science 812 Edited by G
Lecture Notes in Computer Science 812 Edited by G. Goos and J. Hartmanis Advisory Board: W. Brauer D. Gries J. Stoer J. Karhum~iki H. Maurer G. Rozenberg (Eds.) Results and Trends in Theoretical Computer Science Colloquium in Honor of Arto Salomaa Graz, Austria, June 10-11, 1994 Proceedings Springer-Verlag Berlin Heidelberg NewYork London Paris Tokyo Hong Kong Barcelona Budapest Series Editors Gerhard Goos Juris Hartmanis Universitiit Karlsruhe CorneU University Postfach 69 80 Department of Computer Science Vincenz-Priessnitz-Stral3e 1 4130 Upson Hall D-76131 Karlsruhe, Germany Ithaca, NY 14853, USA Volume Editors Juliani Karhum~iki Department of Mathematics, University of Turku SF-20500 Turku, Finland Hermann Maurer Institut fiir Grundlagen der Informationsverarbeitung und Computergesttitzte neue Medien, TU Graz SchielSstattgasse 4a, A-8010 Graz, Austria Grzegorz Rozenberg Department of Computer Science, Leiden University P. O. Box 9512, 2300 RA Leiden, The Netherlands CR Subject Classification (1991): F, E.3, G.2-3 ISBN 3-540-58131-6 Springer-Verlag Berlin Heidelberg New York ISBN 0-387-58131-6 Springer-Verlag New York Berlin Heidelberg CIP data applied for This work is subject to copyright. All fights are reserved, whether the whole or part of the material is concemed, specifically the fights of translation, reprinting, re-use of illustrations, recito';~- k.~.~c~ ~ting, reproduction on microfilms or in any other way, and storage in data banks. Duplicntinn of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for us~ must always be obtained from Springer-Verlag.