Sequences of linear operators related to Cesàro-convergent sequences
Abstract Given a Cesaro-convergent sequence of real numbers \((a_{n}% )_{n\in \mathbb{N}}\), a sequence \((\varphi_{n})_{n\in \mathbb{N}}\) of operators is defined on…
(original)
Differential equations that model electrical circuits
Abstract AuthorsDaniel Anisiu Universitatea Tehnica Cluj-Napoca, Facultatea de Electronica si Telecomunicatii Mira-Cristiana Anisiu Tiberiu Popoviciu Institute of Numerical Analysis Romanian…
Julia Robinson and Hilbert’s tenth problem
Abstract One of the solved Hilbert’s problems stated in 1900 at the International Congress of Mathematicians in Paris is: Given…
On a combinatorics problem
Abstract We present a problem in arrangements, which was solved in 1934 by M. H. Martin in a constructive way,…
Vera Rubin and the hypothesis of dark matter existence
Abstract Our solar system belongs to the Milky Way galaxy. The fact that there exist other galaxies is known since…
Families of planar orbits in one-variable conservative fields
Abstract We discuss a simple case of the planar inverse problem of Dynamics, considering a one-dimension potential \(V=v(x)\). For the…
Yukawa: the man and the potential
Abstract AuthorsMira-Cristiana Anisiu Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy Keywords? Paper coordinatesM.C. Anisiu, Yukawa: the man and the…
Effect of the magnetic field and heat generation on the free convection flow in a tall cavity filled with a porous medium
Abstract A analytical study of the steady magnetohydrodynamics (MFD) free convection in an tall cavity filled with a fluid-saturated porous…
Heat transfer in axisymmetric stagnation flow on a thin cylinder
Abstract AuthorsCornelia Revnic Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy Teodor Grosan Faculty of Mathematics and Computer Science, Babes-Bolyai…
A differential equation with delay from biology
Abstract The purpose of this paper is to present a differential equation with delay from biological excitable medium. Existence, uniqueness…