Studia Mathematica: Recent submissions
Now showing items 81-100 of 215
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On generalized M-projectively recurrent manifolds
(2014)The purpose of the present paper is to study generalized M-projectively recurrent manifolds. Some geometric properties of generalized Mprojectively recurrent manifolds have been studied under certain curvature conditions. ... -
On the gluing of hyperconvex metrics and diversities
(2014)In this work we consider two hyperconvex diversities (or hyperconvex metric spaces) $(X, δ_x)$ and $(Y, δ_y)$ with nonempty intersection and we wonder whether there is a natural way to glue them so that the new ... -
Starlike functions of complex order involving q-hypergeometric functions with fixed point
(2014)Recently Kanas and Ronning introduced the classes of starlike and convex functions, which are normalized with $f(ξ) = f'(ξ) − 1 = 0, ξ (|ξ| = d)$ is a fixed point in the open disc $U = \{z ∈ C : |z| < 1\}$. In this paper ... -
A note on the convergence of partial Szász-Mirakyan type operators
(2014)In this paper we study approximation properties of partial modified Szasz-Mirakyan operators for functions from exponential weight spaces. We present some direct theorems giving the degree of approximation for these ... -
On some flat connection associated with locally symmetric surface
(2014)For every two-dimensional manifold $M$ with locally symmetric linear connection $∇$, endowed also with $∇-parallel$ volume element, we construct a flat connection on some principal fibre bundle $P(M,G)$. Associated with ... -
Perturbation of Toeplitz operators and reflexivity
(2014)It was shown that the space of Toeplitz operators perturbated by finite rank operators is 2-hyperreflexive. -
Simple proofs of some generalizations of the Wilson’s theorem
(2014)In this paper a remarkable simple proof of the Gauss’s generalization of the Wilson’s theorem is given. The proof is based on properties of a subgroup generated by element of order 2 of a finite abelian group. Some conditions ... -
Annales Universitatis Paedagogicae Cracoviensis. 149. Studia Mathematica 13
(Wydawnictwo Naukowe Uniwersytetu Pedagogicznego, Kraków, 2014)Quite a lot changes have happened to the journal I edit since 2007. External conditions out of the journal control led to replacing the word Academiae in the title of the series by the word Universitatis. Going online, ... -
Kinetic equation for a gas with attractive forces as a functional equation
(2009)Diffusion problems studied in the time scale comparable with time of particles collision lead to kinetic equations which for step-wise potentials are functional equations in the velocity space. After a survey of derivation ... -
A combinatorial proof of non-speciality of systems with at most 9 imposed base points
(2009)It is known that the Segre-Gimigliano-Harbourne-Hirschowitz Conjecture holds for linear systems of curves with at most 9 imposed base fat points. We give a nice proof based on a combinatorial method of showing non-speciality ... -
Bounding symbolic powers via asymptotic multiplier ideals
(2009)We revisit a bound on symbolic powers found by Ein-Lazarsfeld-Smith and subsequently improved by Takagi-Yoshida. We show that the original argument of [6] actually gives the same improvement. On the other hand, we show ... -
A note on some iterative roots
(2009)In this paper some orientation-preserving iterative roots of an orientation-preserving homeomorphism $F:S^1 ⟶ S^1$ which possess periodic points of order $n$ are considered. Namely, iterative roots with periodic points ... -
Regulated functions and integrability
(2009)Properties of functions defined on a bounded closed interval, weaker than continuity, have been considered by many mathematicians. Functions having both sides limits at each point are called regulated and were considered ... -
On a multivalued second order differential problem with Jensen multifunction
(2009)The aim of this paper is to present a generalization of the results published in [5] and [8] for continuous Jensen multifunctions. In particular, we study a second order differential problem for multifunctions with the ... -
On some equations stemming from quadrature rules
(2009)We deal with fun tional equations of the type \[F(y) − F(x) = (y − x) \sum_{k=1}^nf_k((1 − λ_k)x + λ_ky),\] connected to quadrature rules and, in particular, we find the solutions of the following functional equation \[f(x) ... -
Explicit solution of a class of Riemann-Hilbert problems
(2009)Analytical solutions to a special class of Riemann-Hilbert boundary value problems on multiply connected domains are presented. The solutions are expressed, up to a finite number of accessory parameters, as non-singular ... -
Annales Universitatis Paedagogicae Cracoviensis. 70. Studia Mathematica 8
(Wydawnictwo Naukowe Uniwersytetu Pedagogicznego, Kraków, 2009) -
Boundary value problem and functional equations for overlapping disks
(2007)We compare applications of the method of functional equations to boundary value problem for circular multiply connected domains and to circular polygons generated by overlapping disks. The second part of the paper is devoted ...