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Vol 52, No 2 (2017)

Differential Equations

Dirichlet and Neumann problems for Poisson equation in half lens

Taghizadeh N., Mohammadi V.S.

Abstract

In this article, the Green and Neumann functions are given for a half lens and the Dirichlet and Neumann problems for Poisson equation are solved. All formulas are given in explicit form.

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):61-69
pages 61-69 views

Functional Analysis

The Casazza-Tremain conjecture in the infinite dimensional Hilbert spaces

Hasankhani Fard M.A.

Abstract

In this paper, the proof of the Casazza-Tremain Conjecture in the infinite dimensional Hilbert spaces is given.

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):70-73
pages 70-73 views

Geometry

On regular tangent cones

Khachatryan R.A.

Abstract

The paper contains a sufficient condition for an intersection of regular tangent cones to be a tangent cone. Regular tangent cones and tents for sets given by locally Lipschitz functions are constructed. The cones are described in terms of generalized K-derivatives.

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):74-80
pages 74-80 views

Real and Complex Analysis

Further results on uniqueness of derivatives of meromorphic functions sharing three sets

Banerjee A., Majumder S., Chakraborty B.

Abstract

In this paper we prove some uniqueness theorems concerning the derivatives of meromorphic functions when they share three sets. The obtained results improve some recent existing results.

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):81-91
pages 81-91 views

A uniqueness theorem for Franklin series

Keryan K.A.

Abstract

In this paperwe prove a theorem on restoration of coefficients of Franklin series by means of its sum under some condition on 2ν-majorant of partial sums of the series.

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):92-101
pages 92-101 views

Results on uniqueness of entire functions whose difference polynomials share a polynomial

Sahoo P., Karmakar H.

Abstract

In this paper, we use the concept of weighted sharing of values to investigate the uniqueness results when two difference polynomials of entire functions share a nonzero polynomial or a small function with a finite weight.We also investigate the situation when the original functions share 0 CM. The obtained results improve some recent related results of X. Li et al. [Ann. Polon. Math, 102 (2011), 111-127] and that of W. Li et al. [Bull. Malay. Math. Sci. Soc., 39 (2016), 499-515].

Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences). 2017;52(2):102-110
pages 102-110 views