TY - JOUR T1 - Horadam Polynomials Estimates for $lambda$-Pseudo-Starlike Bi-Univalent Functions TT - JF - IJMSI JO - IJMSI VL - 17 IS - 2 UR - http://ijmsi.ir/article-1-1505-en.html Y1 - 2022 SP - 165 EP - 170 KW - Bi-univalent functions KW - Coefficient bounds KW - Horadam polynomials KW - $lambda$-Pseudo-starlike functions KW - Fekete-Szeg"{o} problem KW - Subordination. N2 - 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. M3 10.52547/ijmsi.17.2.165 ER -