Studia Mathematica: Recent submissions
Now showing items 101-120 of 215
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Randomly $C_n ∪ C_m$ graphs
(2007)A graph G is said to be a randomly H graph if and only if any subgraph of G without isolated vertices, which is isomorphic to a subgraph of H, can be extended to a subgraph F of G such that F is isomorphic to H. In this ... -
Submaximal Riemann-Roch expected curves and symplectic packing
(2007)We study Riemann–Roch expected curves on $P^1 × P^1$ in the context of the Nagata–Biran conjecture. This conjecture predicts that for a sufficiently large number of points multiple points Seshadri constants of an ample ... -
Fractional calculus and diffusive stress
(2007)The main ideas of fractional calculus are recalled. A quasi-static uncoupled theory of diffusive stresses based on the anomalous diffusion equation with fractional derivatives is formulated. -
Iterative roots of homeomorphisms possessing periodic points
(2007)In this paper we give necessary and sufficient conditions for the existence of orientation-preserving iterative roots of a homeomorphism with a nonempty set of periodic points. We also give a construction method for these roots. -
Some remarks on the domination between conjunctions and disjunctions
(2007)There are diverse domination properties considered in linear programming, game theory, semigroup theory and graph theory. In this paper we present a class of conjunctions which dominate each triangular conorm. Moreover, ... -
Upper estimates of complexity of algorithms for multi-peg Tower of Hanoi problem
(2007)There are proved upper explicit estimates of complexity of algorithms: for multi-peg Tower of Hanoi problem with the limited number of disks, for Reve’s puzzle and for 5-peg Tower of Hanoi problem with the free number of disks. -
Some properties of i-connected sets
(2007)The so-called i-connected sets are considered. The relationships between i-connected sets in natural topology on the plane and i-connected sets in the Hashimoto topology are studied. -
On type sequences and Arf rings
(2007)In this article in Section 2 we give an explicit description to compute the type sequence $t_1, . . ., t_n$ of a semigroup $Γ$ generated by an arithmetic sequence (see 2.7); we show that the $i$-th term $t_i$ is equal to ... -
On sets associated to conditional equation of exponential function
(2007)In the present paper we give a description and properties of the system of cones over Q which are one of parameters determining the solutions of the conditional equation of exponential function. -
Complementary means and double sequences
(2007)We look after the complementary means with respect to a weighted geometric mean of Stolarsky means in the family of Gini means and in the family of Stolarsky means. -
Annales Academiae Paedagogicae Cracoviensis. 45. Studia Mathematica 6
(Wydawnictwo Naukowe Akademii Pedagogicznej, Kraków, 2007)Annales Academiae Paedagogicae Cracoviensis Studia Mathematica (AAPC SM) has undergone radical changes during the last few months. These changes go in two directions. The first, the most visible one is that we go online. ... -
Second Hukuhara derivative and cosine family of linear set-valued functions
(2006)Let $K$ be a closed convex cone with the nonempty interior in a real Banach space and let $cc(K)$ denote the family of all nonempty convex compact subsets of $K$. If $\{F_t : t ≥ 0\}$ is a regular cosine family of continuous ... -
Some properties of convex and *-concave multifunctions
(2006)We investigate some properties of *-concave and convex multifunctions on the real line with convex bounded closed values. In particularly we consider the Hadamard inequality and the Hardy-Littlewood-Pólya majorization ... -
Partial difference equations arising from the Cauchy-Riemann equations
(2006)We consider some functional equations arising from the Cauchy-Riemann equations, and certain related functional equations. First we propose a new functional equation (E.1) below, over a 2-divisible Abelian group, which is ... -
On continuous and residual spectra of operators connected with iterative functional equations
(2006)The sum type operator $F$, given by \[F[ϕ](x) := \sum_{ν=0}^∞ 2^{-ν}ϕ(2^νx),\] will be considered on the space $D$ of bounded real functions, equipped with the supremum norm and on its three proper closed subspaces. ... -
A theorem on divergence of Fourier series
(2006)The paper contains an extension of Calderon's work [2] on the optimality of the Dini test for Fourier series in a set of positive measure. -
Aggregations in classes of fuzzy relations
(2006)We consider aggregations of fuzzy relations using aggregation functions of n variables. After recalling fundamental properties of fuzzy relations we examine aggregation functions which preserve reflexivity, symmetry, ... -
International meetings organized by Polish schools on functional equations
(2006)This is an extended version of the talk given on the 10th International Conference on Functional Equations and Inequalities held in September, 2005, in the Mathematical Research and Conference Center of the Polish Academy ...