Home Sufficient conditions for p-valent functions
Article
Licensed
Unlicensed Requires Authentication

Sufficient conditions for p-valent functions

  • Qaiser Khan , Jacek Dziok , Mohsan Raza EMAIL logo and Muhammad Arif
Published/Copyright: October 4, 2021
Become an author with De Gruyter Brill

Abstract

In the current article, we examine some properties of analytic functions associated with cosine and exponential functions. We calculate some conditions on α so that; if 1+αz2pf(z)p, 1+αz2f(z)pf(z), 1+αzp+2f(z)pf2(z) and 1+αz2p+2f(z)pf3(z) are subordinated by Janowski functions, then f(z)zpcos(z). Further, we also discuss the same implications for f(z)zpez.

MSC 2010: Primary 30C45; 30C50
  1. (Communicated by Stanisława Kanas)

References

[1] Abdullah, A.—Arif, M.—Alghamdi, M. A.—Hussain, S.: Starlikness associated with cosine hyperbolic function, Mathematics 8 (2020), Art. ID 1118.10.3390/math8071118Search in Google Scholar

[2] Ali, R. M.—Cho, N. E.—Ravichandran, V.—Kumar, S. S.: Differential subordination for functions associated with the lemniscate of Bernoulli's, Taiwanese J. Math. 16 (2012), 1017–1026.10.11650/twjm/1500406676Search in Google Scholar

[3] Arif, M.—Ahmad, K.—Liu, J.-L.—Sokół, J.: A new class of analytic functions associated with Salagean operator, J. Func. Spaces 2019 (2019), Art. ID 5157394.10.1155/2019/6157394Search in Google Scholar

[4] Bano, K.—Raza, M.: Starlike functions associated with cosine functions, Bull. Iran. Math. Soc. (2020), https://doi.org/10.1007/s41980-020-00456-9.10.1007/s41980-020-00456-9Search in Google Scholar

[5] Cho, N. E.—Kumar, V.—Kumar, S. S.—Ravichadran, V.: Radius problems for starlike functions associated with the sine function, Bull. Iran. Math. Soc. 45 (2019), 213–232.10.1007/s41980-018-0127-5Search in Google Scholar

[6] Cho, N. E.—Kumar, S.—Kumar, V.—Ravichandran, V.—Srivastava, H. M.: Starlike functions related to the Bell numbers, Symmetry 11 (2019), Art. ID 219.10.3390/sym11020219Search in Google Scholar

[7] Dziok, J.—Raina, R. K.—Sokół, J.: On a class of starlike functions related to a shell-like curve connected with Fibonacci numbers, Math. Comp. Model. 57 (2013), 1203–1211.10.1016/j.mcm.2012.10.023Search in Google Scholar

[8] Haq, M.—Raza, M.—Arif, M.—Khan, Q.—Tang, H.: q-analogue of differential subordinations, Mathematics 7 (2019), Art. ID 724.10.3390/math7080724Search in Google Scholar

[9] Hayman, W. H.: Multivalent Functions, 2nd edition, Cambridge Univ. Press, 1994.10.1017/CBO9780511526268Search in Google Scholar

[10] Jack, I. S.: Functions starlike and convex of order alpha, J. London Math. Soc. 2 (1971), 469–474.10.1112/jlms/s2-3.3.469Search in Google Scholar

[11] Janowski, W.: Extremal problems for a family of functions with positive real part and for some related families, Ann. Polon. Math. 23 (1970), 159–177.10.4064/ap-23-2-159-177Search in Google Scholar

[12] Kanas, S.—Răducano, D.: Some class of analytic functions related to conic domains, Math. Slovaca 64 (2014), 1183–1196.10.2478/s12175-014-0268-9Search in Google Scholar

[13] Kargar, R.—Ebadian, A.—Sokół, J.: On Booth lemniscate and starlike functions, Anal. Math. Phy. 9 (2019), 143–154.10.1007/s13324-017-0187-3Search in Google Scholar

[14] Kumar, S. S.—Kumar, V.—Ravichandran, V.—Cho, N. E.: Sufficient conditions for starlike functions associated with the lemniscate of Bernoulli, J. Ineq. Appl. 2013 (2013), Art. ID 176.10.1186/1029-242X-2013-176Search in Google Scholar

[15] Kumar, S.—Ravichandran, V.: A subclass of starlike functions associated with a rational function, Southeast Asian Bull. Math. 40 (2016), 199–212.Search in Google Scholar

[16] Kumar, S.—Ravichandran, V.: Subordinations for functions with positive real part, Complex Anal. Oper. Theory 12 (2018), 1179–1191.10.1007/s11785-017-0690-4Search in Google Scholar

[17] Ma, W.—Minda, D.: A unified treatment of some special classes of univalent functions. In: Proceeding of the Conference on Complex Analysis (Z. Li, F. Ren, L. Yang and S. Zhang, eds.), Int. Press, 1994, pp. 157–169.Search in Google Scholar

[18] Mendiratta, R.—Nagpal, S.—Ravichandran, V.: On a subclass of strongly starlike functions associated with exponential function, Bull. Malays. Math. Sci. Soc. 38 (2015), 365–386.10.1007/s40840-014-0026-8Search in Google Scholar

[19] Noor, K. I.—Arif, M.: Mapping properties of an integral operator, Appl. Math. Lett. 25 (2012), 1826–1829.10.1016/j.aml.2012.02.030Search in Google Scholar

[20] Paprocki, E.—Sokół, J.: The extremal problems in some subclass of strongly starlike functions, Folia Scient. Univ. Techn. Resoviensis 157 (1996), 89–94.Search in Google Scholar

[21] Raina, R. K.—Sokół, J.: On coefficient estimates for a certain class of starlike functions, Hacet. J. Math. Stat. 44 (2015), 1427–1433.10.15672/HJMS.2015449676Search in Google Scholar

[22] Raza, M.—Sokół, J.—Mushtaq, S.: Differential subordinations for analytic functions, Iran. J. Sci. Tech. Trans. A 43 (2019), 883–890.10.1007/s40995-017-0430-7Search in Google Scholar

[23] Sharma, K.—Jain, N. K.—Ravichandran, V.: Starlike functions associated with a cardioid, Afr. Mat. 27 (2016), 923–939.10.1007/s13370-015-0387-7Search in Google Scholar

[24] Sharma, K.—Ravichandran, V.: Applications of subordination theory to starlike functions, Bull. Iran. Math. Soc. 42 (2016), 761–777.Search in Google Scholar

[25] Shi, L.—Ali, I.—Arif, M.—Cho, N. E.—Hussain, S.—Khan, H.: A study of third Hankel determinant problem for certain subfamilies of analytic functions involving cardioid domain, Mathematics 7 (2019), Art. ID 418.10.3390/math7050418Search in Google Scholar

[26] Shi, L.—Srivastava, H. M.—Arif, M.—Hussain, S.—Khan, H.: An investigation of the third Hankel determinant problem for certain subfamilies of univalent functions involving the exponential function, Symmetry 11 (2019), Art. ID 598.10.3390/sym11050598Search in Google Scholar

[27] Sokół, J.—Stankiewicz, J.: Radius of convexity of some subclasses of strongly starlike functions, Zeszyty Nauk. Politech. Rzeszowskiej Mat. 19 (1996), 101–105.Search in Google Scholar

Received: 2020-03-31
Accepted: 2020-11-11
Published Online: 2021-10-04
Published in Print: 2021-10-26

© 2021 Mathematical Institute Slovak Academy of Sciences

Articles in the same Issue

  1. Regular papers
  2. Algebraic structures for pairwise comparison matrices: Consistency, social choices and Arrow’s theorem
  3. Polynomial functions on rings of dual numbers over residue class rings of the integers
  4. Sufficient conditions for p-valent functions
  5. Upper bounds for analytic summand functions and related inequalities
  6. Global structure for a fourth-order boundary value problem with sign-changing weight
  7. On the nonexistence conditions of solution of two-point in time problem for nonhomogeneous PDE
  8. Solvability of a nonlinear three-dimensional system of difference equations with constant coefficients
  9. Properties of critical and subcritical second order self-adjoint linear equations
  10. Korovkin type approximation via statistical e-convergence on two dimensional weighted spaces
  11. Approximation by a new sequence of operators involving Apostol-Genocchi polynomials
  12. Poisson like matrix operator and its application in p-summable space
  13. On the homological and algebraical properties of some Feichtinger algebras
  14. Disjoint topological transitivity for weighted translations generated by group actions
  15. On simultaneous limits for aggregation of stationary randomized INAR(1) processes with poisson innovations
  16. Marshall-Olkin Lindley-Log-logistic distribution: Model, properties and applications
  17. The shifted Gompertz-G family of distributions: Properties and applications
  18. On the testing hypothesis in uniform family of distributions with nuisance parameter
  19. Clarkson inequalities related to convex and concave functions
Downloaded on 26.10.2025 from https://www.degruyterbrill.com/document/doi/10.1515/ms-2021-0040/pdf
Scroll to top button