{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T22:51:03Z","timestamp":1773096663409,"version":"3.50.1"},"reference-count":1,"publisher":"Association for Computing Machinery (ACM)","issue":"1","license":[{"start":{"date-parts":[[1974,1,1]],"date-time":"1974-01-01T00:00:00Z","timestamp":126230400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["SIGACT News"],"published-print":{"date-parts":[[1974,1]]},"abstract":"<jats:p>Aho and Ullman's correctness proof of Warshall's algorithm (ref. 1, p. 48) is obscure and at one point incorrect. A modified version of this proof is presented.<\/jats:p>","DOI":"10.1145\/1811129.1811134","type":"journal-article","created":{"date-parts":[[2010,6,11]],"date-time":"2010-06-11T18:52:51Z","timestamp":1276282371000},"page":"32-35","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Modification of Aho and Ullman's correctness proof of Warshall's algorithm"],"prefix":"10.1145","volume":"6","author":[{"given":"Peter","family":"Wegner","sequence":"first","affiliation":[{"name":"Brown University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[1974,1]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"Prentice-Hall","author":"Aho A.V.","year":"1972"}],"container-title":["ACM SIGACT News"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1811129.1811134","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1811129.1811134","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T11:22:54Z","timestamp":1750245774000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1811129.1811134"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1974,1]]},"references-count":1,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1974,1]]}},"alternative-id":["10.1145\/1811129.1811134"],"URL":"https:\/\/doi.org\/10.1145\/1811129.1811134","relation":{},"ISSN":["0163-5700"],"issn-type":[{"value":"0163-5700","type":"print"}],"subject":[],"published":{"date-parts":[[1974,1]]},"assertion":[{"value":"1974-01-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}