On coefficient theorems for starlike and quasi-convex of type B mappings in complex Banach spaces

@misc{sokol2026coefficient,
  title = {{On coefficient theorems for starlike and quasi-convex of type B mappings in complex Banach spaces}},
  author = {Janusz Sokol and Sujoy Majumder and Goutam Haldar},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21255},
  eprint = {2610.21255},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21255},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - On coefficient theorems for starlike and quasi-convex of type B mappings in complex Banach spaces
AU  - Janusz Sokol
AU  - Sujoy Majumder
AU  - Goutam Haldar
PY  - 2026
DA  - 2026/10/15
PB  - arXiv
DO  - 10.48550/arxiv.2610.21255
UR  - https://arxiv.org/abs/2610.21255
AB  - In this paper, we study biholomorphic mappings F: 𝔹 → X of the form F(z) = f(z)z for z ∈ 𝔹, where f: 𝔹 → ℂ is a holomorphic function satisfying f(0) = 1 and X is a complex Banach space with the unit ball 𝔹. The main contributions of this paper are threefold. First, we establish a sufficient coefficient condition for a function F(z)=zf(z) to be starlike and quasi-convex of type B in a complex Banach space. Second, we prove that the Bieberbach conjecture holds for these classes of functions. Finally, we analyze the difference of coefficients for such functions in this setting. The results established here directly extend the previous results to the broader setting of complex Banach spaces.
ER  -