{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:10:37Z","timestamp":1760242237395,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2017,1,13]],"date-time":"2017-01-13T00:00:00Z","timestamp":1484265600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>In this paper, we discuss stochastic comparisons of lifetimes of series and parallel systems with heterogeneous Fr\u00e9chet components in terms of the usual stochastic order, reversed hazard rate order and likelihood ratio order. The partial results established here extend some well-known results in the literature of Gupta et al. Specifically, first, we generalize the result of Theorem 2 from the usual stochastic order to the reversed hazard rate order. Second, we generalize the result of Theorem 3 from the reversed hazard rate order to the likelihood ratio order. Last, we generalize the result of Theorem 4 from the hazard rate order to the likelihood ratio order when shape parameter     0 &lt; \u03b1 \u2264 1    .<\/jats:p>","DOI":"10.3390\/sym9010010","type":"journal-article","created":{"date-parts":[[2017,1,13]],"date-time":"2017-01-13T10:08:37Z","timestamp":1484302117000},"page":"10","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Comparing Lifetimes of Series and Parallel Systems with Heterogeneous Fr\u00e9chet Components"],"prefix":"10.3390","volume":"9","author":[{"given":"Longxiang","family":"Fang","sequence":"first","affiliation":[{"name":"Department of Mathematics and Computer Science, Anhui Normal University, Wuhu 241000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanqin","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Computer Science, Anhui Normal University, Wuhu 241000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,1,13]]},"reference":[{"key":"ref_1","first-page":"93","article-title":"Sur la loi de probabilit\u00e9 de l\u00e8cart maximum","volume":"6","year":"1927","journal-title":"Ann. 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