Ara
Toplam kayıt 90, listelenen: 31-40
Remarks on almost η-Ricci solitons in (ε)-para Sasakian manifolds
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
We consider almost η-Ricci solitons in (ε)-para Sasakian manifolds satisfying certain curvature conditions. In the gradient case we give an estimation for the norm of the Ricci curvature tensor and express the scalar ...
Schatten-von Neumann characteristic of infinite tridiagonal block operator matrices
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
In this paper, the boundedness and compactness properties of infinite tridiagonal block operator matrices in the direct sum of Hilbert spaces are studied. The necessary and sufficient conditions for these operators belong ...
The matrix sequence in terms of bi-periodic Fibonacci numbers
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
In this paper, we define the bi-periodic Fibonacci matrix sequence that represent bi-periodic Fibonacci numbers. Then, we investigate generating function, Binet formula and summations of bi-periodic Fibonacci matrix sequence. ...
ω-continuity on generalized neighbourhood systems
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
We introduce
ω
-weakly-
(
g
1
,
g
2
)
-continuous functions on generalized topological spaces and study their relations with other classes of generalized continuous functions given in [1,8]. Then, we define ...
Spherical indicatrices of a Bertrand curve in three dimensional Lie groups
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
In this paper, new representations of a Bertrand curve pair in three dimensional Lie groups with bi-invariant metric are given. Besides, the spherical indicatrices of a Bertrand curve pair are obtained and the relations ...
Convergence of solutions of nonautonomous Nicholson's Blowflies model with impulses
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
This paper deals with a nonautonomous Nicholson's blowflies model with impulses. It is shown that under the proper conditions every positive solution of the model approaches to a constant as t tends to infinity.
Loxodromes on helicoidal surfaces and tubes with variable radius in E⁴
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
In this paper, we generalize the equations of loxodromes on helicoidal surfaces and canal surfaces in E^3 to the case of 4-dimension (E^4). Also we give some examples via Mathematica.
The dimension of products of n homogeneous components in free lie algebras
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
Let L be a free Lie algebra of finite rank r≥2 over a field F and we let L_{m_{i}} denote the degree m_{i} homogeneous component of L. Ralph Stöhr and Micheal Vaughan-Lee derived formulae for the dimension of the subspaces ...
A mathematical model of Hepatitis B transmission in Turkey
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
Hepatitis B infection is one of the serious viral infections that is treating the global health. Turkey has an intermediate endemicity for hepatitis B. In this study, a classical SIR model for hepatitis B virus (HBV) ...
Henneberg's algebraic surfaces in Minkowski 3-space
(Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
Bu çalışmada, üç boyutlu Minkowski uzayında Henneberg minimal yüzeyi ele alınmış olup yüzeyin derece, sınıf ve integralden bağımsız gösterinleri verilniştir.