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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.0 20120330//EN" "JATS-journalpublishing1.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="research-article"><front><journal-meta><journal-id journal-id-type="publisher-id">INFORMATICA</journal-id><journal-title-group><journal-title>Informatica</journal-title></journal-title-group><issn pub-type="epub">0868-4952</issn><issn pub-type="ppub">0868-4952</issn><publisher><publisher-name>VU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">INF9407</article-id><article-id pub-id-type="doi">10.3233/INF-1998-9407</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research article</subject></subj-group></article-categories><title-group><article-title>Certain Subclasses of Analytic p-valent Functions with Negative Coefficients</article-title></title-group><contrib-group><contrib contrib-type="Author"><name><surname>Raina</surname><given-names>Ravinder Krishna</given-names></name><email xlink:href="mailto:raina.rk@yahoo.com">raina.rk@yahoo.com</email><xref ref-type="aff" rid="j_INFORMATICA_aff_000"/></contrib><contrib contrib-type="Author"><name><surname>Nahar</surname><given-names>Tej Singh</given-names></name><xref ref-type="aff" rid="j_INFORMATICA_aff_001"/></contrib><aff id="j_INFORMATICA_aff_000">Department of Mathematics, C.T.A.E., Campus Udaipur, Udaipur 313001, Rajasthan, India</aff><aff id="j_INFORMATICA_aff_001">Department of Mathematics, Govt. Post-graduate College, Bhilwara 311001, Rajasthan, India</aff></contrib-group><pub-date pub-type="epub"><day>01</day><month>01</month><year>1998</year></pub-date><volume>9</volume><issue>4</issue><fpage>469</fpage><lpage>478</lpage><history><date date-type="received"><day>01</day><month>08</month><year>1998</year></date></history><abstract><p>The object of the present paper is to study certain subclasses J<inf>p</inf><sup>*</sup> (a,b,σ) and C<inf>p</inf>(a,b,σ) of analytic p-valent functions, and obtain coefficient bounds and distortion properties for functions belonging to these subclasses. Further results include distortion inequalities and radii of close-to-convexity, starlikeness and convexity for these classes of functions.</p></abstract><kwd-group><label>Keywords</label><kwd>analytic p-valent functions</kwd><kwd>fractional derivative operator</kwd><kwd>Riemann-Liouville operator</kwd><kwd>close-to-convex functions</kwd><kwd>starlike functions</kwd><kwd>convex functions</kwd></kwd-group></article-meta></front></article>