dorsal/arxiv
View SchemaOn Zalcman's and Bieberbach conjectures
| Authors | Samuel L. Krushkal |
|---|---|
| Categories | |
| ArXiv ID | 2601.10584vv1 |
| URL | https://arxiv.org/abs/2601.10584 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
The well-known Zalcman conjecture, which implies the Bieberbach conjecture, states that the coefficients of univalent functions $f(z) = z + \sum\limits_2^{\infty} a_n z^n$ on the unit disk satisfy $|a_n^2 - a_{2n-1}| \le (n-1)^2$ for all $n > 2$, with equality only for the Koebe function and its rotations. The conjecture was proved by the author for $n \le 6$ (using geometric arguments related to the Ahlfors-Schwarz lemma) and remains open for $n \ge 7$. The main theorem of this paper states that these conjectures are equivalent and provides their simultaneous proof for all $n \ge 3$ combining the indicated geometric arguments with a new author's approach to extremal problems for holomorphic functions based on lifting the rotationally homogeneous coefficient functionals to the Bers fiber space over universal Teichmuller space.
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"abstract": "The well-known Zalcman conjecture, which implies the Bieberbach conjecture, states that the coefficients of univalent functions $f(z) = z + \\sum\\limits_2^{\\infty} a_n z^n$ on the unit disk satisfy $|a_n^2 - a_{2n-1}| \\le (n-1)^2$ for all $n \u003e 2$, with equality only for the Koebe function and its rotations. The conjecture was proved by the author for $n \\le 6$ (using geometric arguments related to the Ahlfors-Schwarz lemma) and remains open for $n \\ge 7$.\n The main theorem of this paper states that these conjectures are equivalent and provides their simultaneous proof for all $n \\ge 3$ combining the indicated geometric arguments with a new author\u0027s approach to extremal problems for holomorphic functions based on lifting the rotationally homogeneous coefficient functionals to the Bers fiber space over universal Teichmuller space.",
"arxiv_id": "2601.10584",
"authors": [
"Samuel L. Krushkal"
],
"categories": [
"math.CV"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "On Zalcman\u0027s and Bieberbach conjectures",
"url": "https://arxiv.org/abs/2601.10584",
"version": "v1"
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