{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T04:33:49Z","timestamp":1766378029683,"version":"3.41.2"},"reference-count":13,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2010,2,3]],"date-time":"2010-02-03T00:00:00Z","timestamp":1265155200000},"content-version":"vor","delay-in-days":33,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100004515","name":"Universiti Kebangsaan Malaysia","doi-asserted-by":"publisher","award":["UKM-GUP-TMK-07-02-107"],"award-info":[{"award-number":["UKM-GUP-TMK-07-02-107"]}],"id":[{"id":"10.13039\/501100004515","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["International Journal of Mathematics and Mathematical Sciences"],"published-print":{"date-parts":[[2010,1]]},"abstract":"<jats:p>M. H. Al\u2010Abbadi and M. Darus (2009) recently introduced a new generalized derivative\noperator , which generalized many well\u2010known operators studied earlier\nby many different authors. In this present paper, we shall investigate a new\nsubclass of analytic functions in the open unit disk <jats:italic>U<\/jats:italic> = {<jats:italic>z<\/jats:italic> \u2208 <jats:italic>\u2102<\/jats:italic> : |<jats:italic>z<\/jats:italic>| &lt; 1} which is defined by new generalized derivative operator. Some results on coefficient inequalities, growth and distortion theorems, closure theorems, and extreme points of analytic functions belonging to the subclass are obtained.<\/jats:p>","DOI":"10.1155\/2010\/343580","type":"journal-article","created":{"date-parts":[[2010,2,3]],"date-time":"2010-02-03T15:29:04Z","timestamp":1265210944000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["On Subclass of Analytic Univalent Functions Associated with Negative Coefficients"],"prefix":"10.1155","volume":"2010","author":[{"given":"Ma\u2032moun Harayzeh","family":"Al-Abbadi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maslina","family":"Darus","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,2,3]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.2307\/2039855"},{"key":"e_1_2_6_2_2","first-page":"265","article-title":"Differential subordination for new generalized derivative operator","author":"Al-Abbadi M. 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