{"id":"https://openalex.org/W2119570119","doi":"https://doi.org/10.3217/jucs-003-11-1167","title":"Optimum Extendible Prefix Codes","display_name":"Optimum Extendible Prefix Codes","publication_year":2020,"publication_date":"2020-04-07","ids":{"openalex":"https://openalex.org/W2119570119","doi":"https://doi.org/10.3217/jucs-003-11-1167","mag":"2119570119"},"language":"ta","primary_location":{"id":"pmh:oai:zenodo.org:6995450","is_oa":true,"landing_page_url":"https://zenodo.org/record/6995450","pdf_url":"https://zenodo.org/record/6995450","source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"JUCS - Journal of Universal Computer Science 3((11)) 1167-1179","raw_type":"info:eu-repo/semantics/article"},"type":"article","indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://zenodo.org/record/6995450","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5079186295","display_name":"Cristian S. Calude","orcid":"https://orcid.org/0000-0002-8711-6799"},"institutions":[{"id":"https://openalex.org/I154130895","display_name":"University of Auckland","ror":"https://ror.org/03b94tp07","country_code":"NZ","type":"education","lineage":["https://openalex.org/I154130895"]}],"countries":["NZ"],"is_corresponding":true,"raw_author_name":"Cristian S. Calude","raw_affiliation_strings":["University of AUCKLAND"],"affiliations":[{"raw_affiliation_string":"University of AUCKLAND","institution_ids":["https://openalex.org/I154130895"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5030614495","display_name":"Ioan Tomescu","orcid":"https://orcid.org/0000-0002-4747-9843"},"institutions":[{"id":"https://openalex.org/I141595442","display_name":"University of Bucharest","ror":"https://ror.org/02x2v6p15","country_code":"RO","type":"education","lineage":["https://openalex.org/I141595442"]}],"countries":["RO"],"is_corresponding":false,"raw_author_name":"Ioan Tomescu","raw_affiliation_strings":["University of Bucharest*"],"affiliations":[{"raw_affiliation_string":"University of Bucharest*","institution_ids":["https://openalex.org/I141595442"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5079186295"],"corresponding_institution_ids":["https://openalex.org/I154130895"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.00102851,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"3","issue":null,"first_page":"1167","last_page":"1179"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11130","display_name":"Coding theory and cryptography","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/prefix-code","display_name":"Prefix code","score":0.8254470825195312},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8216915726661682},{"id":"https://openalex.org/keywords/alphabet","display_name":"Alphabet","score":0.7052470445632935},{"id":"https://openalex.org/keywords/extension","display_name":"Extension (predicate logic)","score":0.6735748648643494},{"id":"https://openalex.org/keywords/prefix","display_name":"Prefix","score":0.6588907241821289},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.6135825514793396},{"id":"https://openalex.org/keywords/constant-weight-code","display_name":"Constant-weight code","score":0.539854884147644},{"id":"https://openalex.org/keywords/construct","display_name":"Construct (python library)","score":0.48411688208580017},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4493383765220642},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3526965379714966},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.2990924119949341},{"id":"https://openalex.org/keywords/linear-code","display_name":"Linear code","score":0.2272162139415741},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.13903480768203735},{"id":"https://openalex.org/keywords/block-code","display_name":"Block code","score":0.11684733629226685}],"concepts":[{"id":"https://openalex.org/C20079647","wikidata":"https://www.wikidata.org/wiki/Q1278039","display_name":"Prefix code","level":5,"score":0.8254470825195312},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8216915726661682},{"id":"https://openalex.org/C112876837","wikidata":"https://www.wikidata.org/wiki/Q837518","display_name":"Alphabet","level":2,"score":0.7052470445632935},{"id":"https://openalex.org/C2778029271","wikidata":"https://www.wikidata.org/wiki/Q5421931","display_name":"Extension (predicate logic)","level":2,"score":0.6735748648643494},{"id":"https://openalex.org/C141603448","wikidata":"https://www.wikidata.org/wiki/Q134830","display_name":"Prefix","level":2,"score":0.6588907241821289},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.6135825514793396},{"id":"https://openalex.org/C197242373","wikidata":"https://www.wikidata.org/wiki/Q5163613","display_name":"Constant-weight code","level":5,"score":0.539854884147644},{"id":"https://openalex.org/C2780801425","wikidata":"https://www.wikidata.org/wiki/Q5164392","display_name":"Construct (python library)","level":2,"score":0.48411688208580017},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4493383765220642},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3526965379714966},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.2990924119949341},{"id":"https://openalex.org/C2400350","wikidata":"https://www.wikidata.org/wiki/Q1752667","display_name":"Linear code","level":4,"score":0.2272162139415741},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.13903480768203735},{"id":"https://openalex.org/C157125643","wikidata":"https://www.wikidata.org/wiki/Q884707","display_name":"Block code","level":3,"score":0.11684733629226685},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"pmh:oai:zenodo.org:6995450","is_oa":true,"landing_page_url":"https://zenodo.org/record/6995450","pdf_url":"https://zenodo.org/record/6995450","source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"JUCS - Journal of Universal Computer Science 3((11)) 1167-1179","raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.100.5298","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.100.5298","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.jucs.org/jucs_3_11/optimum_extendible_prefix_codes/Calude_C_S_1.pdf","raw_type":"text"},{"id":"doi:10.3217/jucs-003-11-1167","is_oa":true,"landing_page_url":"https://doi.org/10.3217/jucs-003-11-1167","pdf_url":null,"source":{"id":"https://openalex.org/S4306400660","display_name":"TUGraz OPEN Library (Graz University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4092182","host_organization_name":"Graz University of Technology","host_organization_lineage":["https://openalex.org/I4092182"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"},{"id":"mag:2119570119","is_oa":false,"landing_page_url":"http://www.jucs.org/jucs_3_11/optimum_extendible_prefix_codes/Calude_C_S_1.pdf","pdf_url":null,"source":{"id":"https://openalex.org/S58563349","display_name":"JUCS - Journal of Universal Computer Science","issn_l":"0948-695X","issn":["0948-695X","0948-6968"],"is_oa":false,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310317875","host_organization_name":"Verlag der Technischen Universit\u00e4t Graz","host_organization_lineage":["https://openalex.org/P4310317875"],"host_organization_lineage_names":["Verlag der Technischen Universit\u00e4t Graz"],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":"JUCS - Journal of Universal Computer Science","raw_type":null}],"best_oa_location":{"id":"pmh:oai:zenodo.org:6995450","is_oa":true,"landing_page_url":"https://zenodo.org/record/6995450","pdf_url":"https://zenodo.org/record/6995450","source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"JUCS - Journal of Universal Computer Science 3((11)) 1167-1179","raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/4","display_name":"Quality Education","score":0.5299999713897705}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W2119570119.pdf"},"referenced_works_count":7,"referenced_works":["https://openalex.org/W196919032","https://openalex.org/W1509016759","https://openalex.org/W1598664776","https://openalex.org/W2020311636","https://openalex.org/W2060108852","https://openalex.org/W2099111195","https://openalex.org/W2567782165"],"related_works":["https://openalex.org/W2497702133","https://openalex.org/W811767192","https://openalex.org/W2398238092","https://openalex.org/W2010074361","https://openalex.org/W2848212707","https://openalex.org/W2056723920","https://openalex.org/W2952818498","https://openalex.org/W195667097","https://openalex.org/W1803004549","https://openalex.org/W3101462370","https://openalex.org/W1995000717","https://openalex.org/W2018691674","https://openalex.org/W2963079252","https://openalex.org/W2102824199","https://openalex.org/W2963622137","https://openalex.org/W1893159924","https://openalex.org/W2963038178","https://openalex.org/W1997044393","https://openalex.org/W3194327628","https://openalex.org/W2157899473"],"abstract_inverted_index":{"Abstract:":[0],"Suppose":[1],"that":[2,42],"we":[3,74,89],"have":[4],"L":[5,51],"messages":[6,40,52],"coded":[7],"by":[8,43,85],"a":[9,20,67,100],"prefix":[10,62,81,102,118],"code":[11,59,82,107,119],"(over":[12,63],"an":[13,91],"alphabet":[14],"M":[15],"with":[16],"m":[17],"letters)":[18],"having":[19],"minimum":[21,68],"weighted":[22,69],"length.":[23],"The":[24],"problem":[25],"addressed":[26],"in":[27],"this":[28,72],"paper":[29],"is":[30,60,108],"the":[31,46,49,56,76,96,105],"following:":[32],"How":[33],"to":[34,94],"find":[35],"s":[36],"codewords":[37],"for":[38],"new":[39],"so":[41],"leaving":[44],"unchanged":[45],"codification":[47],"of":[48,78,99],"first":[50],"(by":[53],"compatibility":[54],"reasons),":[55],"resulting":[57],"extended":[58],"still":[61],"M)":[64],"and":[65,83],"has":[66],"length?":[70],"To":[71],"aim":[73],"introduce":[75],"notion":[77],"optimum":[79,97,116],"extendible":[80,117],"then,":[84],"modifying":[86],"Huffman\u2019s":[87],"algorithm,":[88],"give":[90],"efficient":[92],"algorithm":[93],"construct":[95],"extension":[98],"non-complete":[101],"code,":[103],"provided":[104],"initial":[106],"optimal.":[109],"Key":[110],"Words:":[111],"Kraft\u2019s":[112],"inequality,":[113],"Huffman":[114],"tree,":[115],"Category:":[120],"F.1":[121]},"counts_by_year":[],"updated_date":"2026-03-20T23:20:44.827607","created_date":"2025-10-10T00:00:00"}
