Hankel determinant for functions starlike and convex with respect to symmetric points
Sakaguchi (1959) introduced the class of functions S*s , starlike with respect to symmetric points. In 1977, Das and Singh introduced similar class of functions Cs , convex with respect to symmetric points. Here, upper bound for the functional |a2a4-a23| is attained for functions f(z)=z+ ∑ anzn...
| Main Authors: | , , |
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| Format: | Article |
| Published: |
Penerbit ukm
2006
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| Online Access: | http://journalarticle.ukm.my/1819/ |
| _version_ | 1848809667158867968 |
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| author | Aini Janteng, Suzeini Abdul Halim, Maslina Darus, |
| author_facet | Aini Janteng, Suzeini Abdul Halim, Maslina Darus, |
| author_sort | Aini Janteng, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Sakaguchi (1959) introduced the class of functions
S*s , starlike with respect to symmetric points.
In 1977, Das and Singh introduced similar class of functions Cs , convex with respect to
symmetric points. Here, upper bound for the functional |a2a4-a23| is attained for functions f(z)=z+ ∑ anzn
belonging to S*s and Cs . The result obtained is sharp |
| first_indexed | 2025-11-14T23:18:15Z |
| format | Article |
| id | ukm-1819 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T23:18:15Z |
| publishDate | 2006 |
| publisher | Penerbit ukm |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ukm-18192011-06-21T07:03:05Z http://journalarticle.ukm.my/1819/ Hankel determinant for functions starlike and convex with respect to symmetric points Aini Janteng, Suzeini Abdul Halim, Maslina Darus, Sakaguchi (1959) introduced the class of functions S*s , starlike with respect to symmetric points. In 1977, Das and Singh introduced similar class of functions Cs , convex with respect to symmetric points. Here, upper bound for the functional |a2a4-a23| is attained for functions f(z)=z+ ∑ anzn belonging to S*s and Cs . The result obtained is sharp Penerbit ukm 2006-07 Article PeerReviewed Aini Janteng, and Suzeini Abdul Halim, and Maslina Darus, (2006) Hankel determinant for functions starlike and convex with respect to symmetric points. Journal of Quality Measurement and Analysis, 2 (1). pp. 37-43. ISSN 1823-5670 http://www.ukm.my/~ppsmfst/jqma/index.html |
| spellingShingle | Aini Janteng, Suzeini Abdul Halim, Maslina Darus, Hankel determinant for functions starlike and convex with respect to symmetric points |
| title | Hankel determinant for functions starlike and convex with respect to symmetric points |
| title_full | Hankel determinant for functions starlike and convex with respect to symmetric points |
| title_fullStr | Hankel determinant for functions starlike and convex with respect to symmetric points |
| title_full_unstemmed | Hankel determinant for functions starlike and convex with respect to symmetric points |
| title_short | Hankel determinant for functions starlike and convex with respect to symmetric points |
| title_sort | hankel determinant for functions starlike and convex with respect to symmetric points |
| url | http://journalarticle.ukm.my/1819/ http://journalarticle.ukm.my/1819/ |