Some improvements of criteria of L-index boundedness in direction
Journal Title: Математичні Студії - Year 2017, Vol 47, Issue 1
Abstract
In this paper, we improve criteria of boundedness of L-index in direction for entire functions in Cn. They give an estimate of maximum modulus on circles of various radius, maximum modulus by minimum modulus on circle and describe the behavior of directional logarithmic derivative and the distribution of zeros. The obtained results are also new for entire functions of bounded index in C.
Authors and Affiliations
Andriy Bandura
The Fourier problem for weakly nonlinear integro-differential elliptic-parabolic systems
The Fourier problem or, in other words, the problem without initial conditions for weakly nonlinear elliptic-parabolic systems are considered in this paper. The existence and uniqueness solutions of the problem are prove...
Two-member asymptotic of Laplace-Stieltjes integrals
We study conditions, under which for the Laplace-Stieltjes integral I(σ)=∫∞0f(x)exσdF(x) with the abscissa of the convergence σc=A∈(−∞,+∞] the asymptotical equality lnI(σ)=Φ1(σ)+τ(1+o(1))Φ2(σ) as σ↑A is true, where τ∈R∖{...
On the transcendental meromorphic solutions of a certain class of differential equations
In this paper we consider the differential equation F(k)−a2=eγ{α(F−a1)+β}, where ai(z),α(z)(≢0,∞), β(z)(≢∞), i=1,2 are small functions of F, γ is an entire function and k∈N. Let f be a transcendental meromorphic functi...
Sλ(I) -convergence of complex uncertain sequence
This study introduces the λI-statistically convergence concepts of complex uncertain sequences: λI% -statistically convergence almost surely (Sλ(I).a.s.), λI-statistically convergence in measure, λI-statistically converg...
On one variational problem reducing to differential-boundary operator
One quadratic functional in the real space L2(Ω)(Ω⊂R2) is considered. The conditions are being necessary for the finding of its minimum are indicated and the problem of finding of corresponding sufficient conditions is f...