{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:41:53Z","timestamp":1750308113667,"version":"3.41.0"},"reference-count":3,"publisher":"Association for Computing Machinery (ACM)","issue":"3","license":[{"start":{"date-parts":[[1974,8,1]],"date-time":"1974-08-01T00:00:00Z","timestamp":144547200000},"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":["SIGSAM Bull."],"published-print":{"date-parts":[[1974,8]]},"abstract":"<jats:p>A perturbation method in general relativity, first developed by Levy was used to investigate a slowly pulsating axisymmetric system. The vacuum field equations were calculated to the second order of a small parameter. To be sure of the accuracy of the results obtained, one of the Bianchi identities was checked. The size of the calculations, especially that involved in the Bianchi identity, made it necessary to use an algebraic computer system, in this case LAM.<\/jats:p>","DOI":"10.1145\/1086837.1086851","type":"journal-article","created":{"date-parts":[[2007,1,17]],"date-time":"2007-01-17T18:32:02Z","timestamp":1169058722000},"page":"78-79","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["A perturbation calculation in general relativity"],"prefix":"10.1145","volume":"8","author":[{"given":"H. Ian","family":"Cohen","sequence":"first","affiliation":[{"name":"University of Stockholm"}]}],"member":"320","published-online":{"date-parts":[[1974,8]]},"reference":[{"issue":"2","key":"e_1_2_1_1_1","volume":"12","author":"D'","year":"1969","unstructured":"R.A. D' INVERNO - ALAM: Atlas Lisp Algebraic Manipulator. Comp. J. , Vol. 12 , No. 2 , ( 1969 ). R.A. D'INVERNO - ALAM: Atlas Lisp Algebraic Manipulator. Comp. J., Vol. 12, No. 2, (1969).","journal-title":"ALAM: Atlas Lisp Algebraic Manipulator. Comp. J."},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1017\/S030500410004384X"},{"key":"e_1_2_1_3_1","unstructured":"H.I. COHEN - Thesis Stockholm University (1972).  H.I. COHEN - Thesis Stockholm University (1972)."}],"container-title":["ACM SIGSAM Bulletin"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1086837.1086851","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1086837.1086851","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T16:08:13Z","timestamp":1750262893000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1086837.1086851"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1974,8]]},"references-count":3,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1974,8]]}},"alternative-id":["10.1145\/1086837.1086851"],"URL":"https:\/\/doi.org\/10.1145\/1086837.1086851","relation":{},"ISSN":["0163-5824"],"issn-type":[{"type":"print","value":"0163-5824"}],"subject":[],"published":{"date-parts":[[1974,8]]},"assertion":[{"value":"1974-08-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}