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Recurrent immersions
(Walter de Gruyter GmbH, 1999)In this paper we consider the relations between immersions of recurrent type with the immersions having certain planar properties. Namely, we investigate the weak recurrent immersions 
Dissolution kinetics of ulexite in aqueous EDTA solutions
(Metallurgical SocC I M, 2000)The dissolution kinetics of ulexite in aqueous disodium Ethylene Diamine Tetra Acidic Acid (EDTA) solutions has been investigated with respect to the effects of particle size, solution concentration, pH of solution, ... 
The efficiency of standard wreath product
(Oxford Univ Press, 2000)Let xi be the set of all finite groups that have efficient presentations. In this paper we give sufficient conditions for the standard wreath product of two xigroups to be a Egroup. 
Digital variable sampling integral control of infinitedimensional systems
(2000)In this paper we present sampleddata lowgain Icontrol algorithms for infinitedimensional systems in which the sampling period is not constant. The system is assumed to be exponentially stable with invertible steady ... 
Approximation by pFaber polynomials in the weighted Smirnov class EP (G,omega) and the Bieberbach polynomials
(SpringerVerlag, 2001)Let G subset of C be a finite domain with a regular Jordan boundary L. In this work, the approximation properties of a pFaber polynomial series of functions in the weighted Smirnov class EP (G, W) are studied and the rate ... 
The pcockcroft property of central extensions of groups
(Marcel Dekker Inc, 2001)A presentation for an arbitrary group extension is well known. A generalization of the work by Conway et al. (Group Tenser 1972, 25, 405418) on central extensions has been given by Balk et al. (J. Group Theor.). As an ... 
An obstruction to finding algebraic models for smooth manifolds with prescribed algebraic submanifolds
(Cambridge Univ Press, 2001)Let N ⊆ M be a pair of closed smooth manifolds and L an algebraic model for the submanifold N. In this paper, we will give an obstruction to finding an algebraic model X of M so that the submanifold N corresponds in X ... 
Generalizations of Fibonacci and Lucas sequences
(2002)In this paper, we consider the Hecke groups H(√q), q ≥ 5 prime number, and we find an interesting number sequence which is denoted by dn. For q = 5, we get d2n = L2n+1 and d2n+1 = √5F2n+2 where L2n+1 is (2n + 1)th Lucas ... 
On a class of surfaces in the Euclidean space
(2002)In this study we consider surfaces in the Euclidean space E2+d satisfying the conditions Undefined control sequence \centerdot h = LhQ(g,h) and Undefined control sequence \centerdot h = LAHQ^(AH,h). 
On Some Class of Hypersurfaces in En+1 Satisfying Chen’s Equality
(2002)In this paper we study pseudosymmetry type hypersurfaces in the Euclidean space E n+1 satisfying B. Y. Chen’s equality 
On some class of hypersurfaces in doublestruck E signn+1 satisfying Chen's equality
(2002)In this paper we study pseudosymmetry type hypersurfaces in the Euclidean space n+1 satisfying B. Y. Chen's equality. 
Uniform convergence of bieberbach polynomials in closed radon domains
(2003)Recently, the classical Mergelyan's estimation about the uniform convergence of the Bieberbach polynomials to the conformai mapping in a closed domain with a smooth boundary was improved by ourselves. In this study this ... 
A note on some subgroups of psl(2,c)
(World Scientific Publ Co Pte Ltd, 2003)In this paper, we introduce some discrete subgroups of PSL(2, C) and determine the number of cusps of 3manifolds associated to those groups. 
Some subgroups of the extended Hecke groups H()overbar(lambda(q))
(Elsevier Science Bv, 2003)The authors consider the extended Hecke groups (H) over bar(lambda(q)) generated by T(z) = 1/z, S(z) = 1/(z + lambda(q)) and R(z) = 1/(z) over bar with lambda(q) = 2 cos(pi/q) for q greater than or equal to 3 an integer. ... 
Statespace solutions to standard H∞ control problem
(2003)Simple statespace formulas are derived for all controllers solving a standard H∞ problem. In this paper, we assume that the systems are finite dimension, continuoustime, linear and timeinvariant. There are efficient ... 
The pcockcroft property of the semidirect products of monoids
(World Scientific Publ Co Pte Ltd, 2003)The semidirect product of arbitrary two monoids and a presentation for this product have received considerable attention, see for instance [12, 14, 15]. In [15], Wang defined a trivializer set of the Squier complex ... 
Integral control by variable sampling based on steadystate data
(PergamonElsevier Science Ltd, 2003)In this paper we consider integral control algorithms with convergent adaptive sampling for multivariable infinitedimensional systems. Steadystate gain information is used in choosing suitable integrator gains and we ... 
Submanifolds satisfying some curvature conditions imposed on the Weyl tensor
(Australian Mathematics Publ Assoc Inc, 2003)In this paper we define Weyl semiparallel (C . h = 0) and Weyl 2semiparallel (C . (&DEL;) over barh 0) submanifolds. We consider ndimensional normally flat submanifolds satisfying these curvature conditions in (n + ... 
Minimal but inefficient presentations of the semidirect products of some monoids
(Springer, 2003)In recent papers of Ruskuc, Saito and J. Wang, the semidirect product of two arbitrary monoids and a standard presentation, say P, for this product have received considerable attention. Wang defined a trivialiser set of ... 
Uniform convergence of the Bieberbach polynomials in closed smooth domains of bounded boundary rotation
(Academic Press Inc Elsevier Science, 2003)Let G be a Jordan smooth domain of bounded boundary rotation, let z(0) epsilon G, and let w = phi(0) (z) be the conformal mapping of G onto D (0, r(0)) := {w : \w\ < r(0)) with the normalization phi(0) (z(0)) = 0, phi(0)' ...