Geodesic
Some applications of $P'$-sequences in studying boundary properties of arbitrary harmonic functions
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (2011), pp. 3-9.

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In this paper we study some boundary properties of harmonic functions defined in the unit disk in dependence of the location of $P'$-sequences on chords and horocycles. We introduce notions of $P'$-chords, normal chords, $P'$-horocycles, and normal horocycles.
Keywords: harmonic functions, non-Euclidean circles, $P'$-sequence, $P'$-chord, horocyclic angle.
Mots-clés : radii and distances, horocyclic point 
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S. L. Berberyan. Some applications of $P'$-sequences in studying boundary properties of arbitrary harmonic functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (2011), pp. 3-9. http://geodesic.mathdoc.fr/item/IVM_2011_9_a0/

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