Research output: Contribution to journal › Article › peer-review
On Bloch seminorm of finite Blaschke products in the unit disk. / Baranov, Anton D.; Kayumov, Ilgiz R.; Nasyrov, Semen R.
In: Journal of Mathematical Analysis and Applications, Vol. 509, No. 2, 125983, 15.05.2022.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - On Bloch seminorm of finite Blaschke products in the unit disk
AU - Baranov, Anton D.
AU - Kayumov, Ilgiz R.
AU - Nasyrov, Semen R.
N1 - Publisher Copyright: © 2021 Elsevier Inc.
PY - 2022/5/15
Y1 - 2022/5/15
N2 - We prove that, for any finite Blaschke product w=B(z) in the unit disk, the corresponding Riemann surface over the w–plane contains a one-sheeted disk of the radius 0.5. Moreover, it contains a unit one-sheeted disk with a radial slit. We apply this result to obtain a universal lower estimate of the Bloch seminorm for finite Blaschke products.
AB - We prove that, for any finite Blaschke product w=B(z) in the unit disk, the corresponding Riemann surface over the w–plane contains a one-sheeted disk of the radius 0.5. Moreover, it contains a unit one-sheeted disk with a radial slit. We apply this result to obtain a universal lower estimate of the Bloch seminorm for finite Blaschke products.
KW - Blaschke product
KW - Bloch seminorm
KW - Bounded analytic function
KW - Riemann surface
UR - http://www.scopus.com/inward/record.url?scp=85122498349&partnerID=8YFLogxK
U2 - 10.1016/j.jmaa.2021.125983
DO - 10.1016/j.jmaa.2021.125983
M3 - Article
AN - SCOPUS:85122498349
VL - 509
JO - Journal of Mathematical Analysis and Applications
JF - Journal of Mathematical Analysis and Applications
SN - 0022-247X
IS - 2
M1 - 125983
ER -
ID: 100818933