{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T09:46:38Z","timestamp":1771494398306,"version":"3.50.1"},"reference-count":11,"publisher":"World Scientific Pub Co Pte Lt","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Found. Comput. Sci."],"published-print":{"date-parts":[[2000,12]]},"abstract":"<jats:p> We consider automata systems consisting of several pushdown automata working in parallel and communicating the contents of their stacks by request, using a communication strategy borrowed from grammar system theory. We investigate the computational power of these mechanisms. We prove that non-centralized parallel communicating pushdown automata systems with a bounded number of components, where each automaton is allowed to issue a query, are able to recognize all recursively enumerable languages. We also present homomorphical characterizations of the class of recursively enumerable languages for the centralized variants, where only a distinguished automaton issues queries. Moreover, we show that these centralized variants are at least as powerful as one-way multihead pushdown automata. Finally, some open problems and further directions of research are discussed. <\/jats:p>","DOI":"10.1142\/s0129054100000338","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T11:04:45Z","timestamp":1027767885000},"page":"631-650","source":"Crossref","is-referenced-by-count":15,"title":["PARALLEL COMMUNICATING PUSHDOWN AUTOMATA SYSTEMS"],"prefix":"10.1142","volume":"11","author":[{"given":"ERZS\u00c9BET","family":"CSUHAJ-VARJ\u00da","sequence":"first","affiliation":[{"name":"Computer and Automation Research Institute, Hungarian Academy of Sciences, Kende u. 13-17, H-1111 Budapest, Hungary"}]},{"given":"CARLOS","family":"MART\u00cdN-VIDE","sequence":"additional","affiliation":[{"name":"Research Group in Mathematical Linguistics and Language Engineering, Rovira i Virgili University, P\u00e7a. Imperial T\u00e0rraco 1, 43005 Tarragona, Spain"}]},{"given":"VICTOR","family":"MITRANA","sequence":"additional","affiliation":[{"name":"University of Bucharest, Faculty of Mathematics, Str. Academiei 14, 70109, Bucharest, Romania"}]},{"given":"GY\u00d6RGY","family":"VASZIL","sequence":"additional","affiliation":[{"name":"Computer and Automation Research Institute, Hungarian Academy of Sciences, Kende u. 13-17, H-1111 Budapest, Hungary"}]}],"member":"219","published-online":{"date-parts":[[2011,11,20]]},"reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1016\/0020-0190(87)90172-4"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.1142\/S0129054196000191"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1006\/jcss.1996.0006"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.1145\/321623.321625"},{"key":"p_6","doi-asserted-by":"publisher","DOI":"10.1006\/jcss.1998.1610"},{"key":"p_7","doi-asserted-by":"publisher","DOI":"10.1145\/322203.322211"},{"key":"p_8","doi-asserted-by":"publisher","DOI":"10.1007\/BF00289513"},{"key":"p_9","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-0000(73)80048-0"},{"key":"p_10","doi-asserted-by":"publisher","DOI":"10.1016\/0020-0190(74)90043-X"},{"key":"p_13","first-page":"55","volume":"38","author":"Paun Gh.","year":"1989","journal-title":"Ann. Univ. Bucharest, Ser. Matem.-Inform."},{"key":"p_15","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1051\/ita\/1977110301811","volume":"11","author":"Sudborough I. H.","year":"1977","journal-title":"RAIRO Informat. Theor."}],"container-title":["International Journal of Foundations of Computer Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.worldscientific.com\/doi\/pdf\/10.1142\/S0129054100000338","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,8,7]],"date-time":"2019-08-07T00:47:04Z","timestamp":1565138824000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.worldscientific.com\/doi\/abs\/10.1142\/S0129054100000338"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000,12]]},"references-count":11,"journal-issue":{"issue":"04","published-online":{"date-parts":[[2011,11,20]]},"published-print":{"date-parts":[[2000,12]]}},"alternative-id":["10.1142\/S0129054100000338"],"URL":"https:\/\/doi.org\/10.1142\/s0129054100000338","relation":{},"ISSN":["0129-0541","1793-6373"],"issn-type":[{"value":"0129-0541","type":"print"},{"value":"1793-6373","type":"electronic"}],"subject":[],"published":{"date-parts":[[2000,12]]}}}