Details

Autor(en) / Beteiligte

• Brevig, Ole Fredrik
• Ortega-Cerdà, Joaquim
• Seip, Kristian

Titel

A converse to the Schwarz lemma for planar harmonic maps

Ist Teil von

• Journal of mathematical analysis and applications, 2021-05, Vol.497 (2), p.124908, Article 124908

Ort / Verlag

Elsevier Inc

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• A sharp version of a recent inequality of Kovalev and Yang on the ratio of the (H1)⁎ and H4 norms for certain polynomials is obtained. The inequality is applied to establish a sharp and tractable sufficient condition for the Wirtinger derivatives at the origin for harmonic self-maps of the unit disc which fix the origin.