{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,28]],"date-time":"2025-09-28T15:31:02Z","timestamp":1759073462071},"reference-count":5,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2014,3,12]],"date-time":"2014-03-12T00:00:00Z","timestamp":1394582400000},"content-version":"unspecified","delay-in-days":9873,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. symb. log."],"published-print":{"date-parts":[[1987,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We show that either PFA<jats:sup>+<\/jats:sup> or Martin's maximum implies Fleissner's Axiom R, a reflection principle for stationary subsets of <jats:italic>P<\/jats:italic><jats:sub>\u2135<\/jats:sub>(<jats:italic>\u03bb<\/jats:italic>). In fact, the \u201cplus version\u201d (for one term denoting a stationary set) of Martin's axiom for countably closed partial orders implies Axiom R.<\/jats:p>","DOI":"10.2307\/2273877","type":"journal-article","created":{"date-parts":[[2006,5,6]],"date-time":"2006-05-06T22:20:33Z","timestamp":1146954033000},"page":"216-218","source":"Crossref","is-referenced-by-count":3,"title":["Strong analogues of Martin's axiom Imply Axiom R"],"prefix":"10.1017","volume":"52","author":[{"given":"Robert E.","family":"Beaudoin","sequence":"first","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2014,3,12]]},"reference":[{"key":"S0022481200030140_bib004","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-662-21543-2"},{"key":"S0022481200030140_bib005","volume":"52","author":"Shelah","year":"1987","journal-title":"Semiproper forcing axiom implies Martin maximum but not PFA+"},{"key":"S0022481200030140_bib001","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-444-86580-9.50024-0"},{"key":"S0022481200030140_bib003","unstructured":"Foreman, M. , Magidor, M. and Shelah, S. , Martin's maximum, saturated ideals, and nonregular ultrafilters. Part I (to appear)."},{"key":"S0022481200030140_bib002","unstructured":"Fleissner, W. , Left-separated spaces with point-countable bases (to appear)."}],"container-title":["The Journal of Symbolic Logic"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022481200030140","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,4,11]],"date-time":"2022-04-11T08:12:41Z","timestamp":1649664761000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022481200030140\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1987,3]]},"references-count":5,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1987,3]]}},"alternative-id":["S0022481200030140"],"URL":"https:\/\/doi.org\/10.2307\/2273877","relation":{},"ISSN":["0022-4812","1943-5886"],"issn-type":[{"value":"0022-4812","type":"print"},{"value":"1943-5886","type":"electronic"}],"subject":[],"published":{"date-parts":[[1987,3]]}}}