%0 Journal Article %A Hussein, H.A. %A Wanas, A.K. %T Horadam Polynomials Estimates for $lambda$-Pseudo-Starlike Bi-Univalent Functions %J Iranian Journal of Mathematical Sciences and Informatics %V 17 %N 2 %U http://ijmsi.ir/article-1-1505-en.html %R 10.52547/ijmsi.17.2.165 %D 2022 %K Bi-univalent functions, Coefficient bounds, Horadam polynomials, $lambda$-Pseudo-starlike functions, Fekete-Szeg"{o} problem, Subordination., %X In the present investigation, we use the Horadam Polynomials to establish upper bounds for the second and third coefficients of functions belongs to a new subclass of analytic and $lambda$-pseudo-starlike bi-univalent functions defined in the open unit disk $U$. Also, we discuss Fekete-Szeg$ddot{o}$ problem for functions belongs to this subclass. %> http://ijmsi.ir/article-1-1505-en.pdf %P 165-170 %& 165 %! %9 Research paper %L A-10-2676-7 %+ Department of Mathematics College of Science University of Al-Qadisiyah, Iraq %G eng %@ 1735-4463 %[ 2022