# Department of Mathematics, Corvinus University of Budapest

# Pure Mathematics and Applications

Postal: 1093 Budapest, Fővám tér 8

Phone: +36-1-482-5347

Web page: http://economics.uni-corvinus.hu/

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Phone: +36-1-482-5347

Web page: http://economics.uni-corvinus.hu/

Email:

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### 2000, Volume 11, Issue 3

### 2000, Volume 11, Issue 2

**119-127 On a certain class of approximation operators***by*Agratini, O.**129-138 5 and 10 order transforms in four dimensional crystal families***by*Ãcs, L.**139-151 Heuristics for PNS problems and its empirical analysis***by*BlÃ¡zsik, Z., KeserÅ±, K. & KovÃ¡cs, Z.**153-159 Contributions to coincidence degree theory of homogeneous operators***by*BuicÄƒ, A.**161-171 Arcwise connectedness of solution set of an infinite horizon nonlinear integrodifferential inclusion***by*Cernea, A.**173-181 On $m$-injective modules over Noetherian rings***by*Crivei, S.**183-186 Fixed point theorems in generalized metric spaces***by*DezsÅ‘, G.**187-207 The acceleration of the convergence of certain approximant sequences***by*Diaconu, A.**209-217 Scalar and vector variational inequalities***by*Domokos, A.**219-230 Stochastic regular splitting and its application to the iterative methods***by*FaragÃ³, I. & KovÃ¡cs, M.**231-242 A generalisation of a Newton-Kantorovich-Seidel type theorem***by*Finta, B.**243-253 The numerical approximation to positive solution for some reaction-diffusion problems***by*Gheorghiu, C.I. & Trif, D.**255-264 A combined method for a two-point boundary value problem***by*Goldner, G. & TrÃ®mbiÅ£aÅŸ, R.**265-279 A look ahead branch-and-bound procedure for solving PNS problems***by*HollÃ³, C.**281-291 On the sign-stability of the numerical solutions of the heat equation***by*HorvÃ¡th, R.**293-308 Parallel programs implementing abstract data type operations***by*HorvÃ¡th, Z., Kozsik, T. & Venczel, T.**309-316 Gradient method for non-uniformly convex functionals in Hilbert space***by*KarÃ¡tson, J.**317-327 On rational, linear and algebraic languages defined by mix operation***by*Kudlek, M. & Mateescu, A.**329-339 Some new results on primitive words and language classes***by*Kudlek, M.**341-349 Existence, uniqueness and data dependence for the solution of a boundary value problem with deviating argument***by*MureÅŸan, V.**351-360 Multidimensional data structures for parallel programs description***by*Niculescu, V.**361-368 Multivalued operators and fixed points***by*PetruÅŸel, A.**369-374 Semicontinuity of a class of generalized convex and a class of generalized concave set-valued maps***by*Popa, D.**375-384 Discrete continuation method for nonlinear integral equations in Banach spaces***by*Precup, R.**385-399 Query evaluation in deductive object oriented databases***by*Zawia, A.T.

### 2000, Volume 11, Issue 1

**1-11 Classification of transitive caps in $\rm PG(3,5)$***by*Abatangelo, V.**13-21 Representation of preference orderings on totally ordered semigroups***by*Allevi, E. & Zuanon, M.E.**23-32 Arcs in Laguerre planes***by*Bisi, C. & Rinaldi, G.**33-41 Some results on the orthogonal basis of a symmetry class of tensors***by*Darafsheh, M.R. & Poursalavati, N.S.**43-49 Semihypergroups and $S$-hypersystems***by*Davvaz, B. & Poursalavati, N.S.**51-58 On fuzzy relations and fuzzy subhypergroups***by*Davvaz, B.**59-66 Control subgroups and radicals of graded rings***by*Hussein, S.E.S.**67-69 Note on quasi-ideals of ordered semigroups***by*Kehayopulu, N. & Lajos, S.**71-77 Partial Steiner triple systems as bases of flexible algebras***by*Lenzi, D.**79-84 On the maximal subgroups of Sylow subgroups of Fitting subgroup of finite groups***by*Ramadan, M.**85-87 $C$-decomposition and $s$-$m$ representation of product of groups***by*SzÃ©p, J.**89-91 On the center of the group $G$***by*SzÃ©p, J.**93-97 The star chromatic numbers of graph products***by*Wang, Y.**99-104 The vanishing of modular symmetry classes of tensors***by*Zamani, Y.**105-118 Incidence algebras of simplicial complexes***by*Zapatrin, R.R.

### 1999, Volume 10, Issue 4

**363-379 Extremal solutions of classes of multivalued differential equations***by*Ibrahim, A.G. & Gomaa, A.M.**381-384 A simple proof and short forms for the Kuhn-Fourier theorem***by*SzilÃ¡gyi, P.**385-390 Vertical halfspaces as solutions of dual extremal problems***by*Brinkhuis, J.**391-402 On a quasilinear elliptic Neumann problem***by*Halidias, N. & Papageorgiou, N.S.**403-411 Generalized second-order directional derivatives for a class of nonsmooth functions***by*Meng, F., Xia, Z. & Gao, Y.**413-421 $M$-functions and scale dependent input-output models***by*Allevi, E. & Torriero, A.**423-429 On the Nash-Cournot equilibrium of multi-market oligopolies***by*Ge, D. & Szidarovszky, F.**431-447 On the existence of a short admissible pivot sequence for feasibility and linear optimization problems***by*Fukuda, K. & Terlaky, T.**449-463 Stabilization of discrete-time interconnected systems using a receding horizon control***by*Gyurkovics, Ã‰. & TakÃ¡cs, T.

### 1999, Volume 10, Issue 3

**241-248 Orthogonal basis of the symmetry classes of tensors associated with the direct product of permutation groups***by*Darafsheh, M.R. & Poursalavati, N.S.**249-265 A class of profinite groups***by*Francini, P.**267-278 Bent-like functions on groupoids***by*GroÅ¡ek, O. & Wei, W.**279-291 Weak, dual weak and strong FH-homomorphisms of $F$-polygroups***by*Hasankhani, A. & Zahedi, M.M.**293-301 Semisimplicity of modules over strongly graded rings***by*Hussein, S.E.S.**303-312 Induced and restricted modules over graded rings***by*Hussein, S.E.S.**313-322 On an algorithm concerning the languages $Q\cap(ab\sp *)\sp n$***by*KÃ¡szonyi, L. & Katsura, M.**323-329 Interior ideals and interior ideal elements in ordered semigroups***by*Kehayopulu, N.**331-336 On left regular po-semigroups***by*Lee, S.K. & Nam, S.J.**337-340 Integrally po-semigroups***by*Lee, S.K. & Noh, H.Y.**341-360 Finite groups with few central automorphism orbits. II***by*Silberberg, G.

### 1999, Volume 10, Issue 2

**161-171 All the linear alternative, existence and duality theorems are equivalent***by*SzilÃ¡gyi, P.**183-196 Extremal problems and inclusion of perturbations in halfspaces***by*Brinkhuis, J.**197-223 Topological properties of the solution sets of some differential inclusions***by*Ibrahim, A.G. & Gomaa, A.M.**225-239 Monotonicity, convergence and control in dynamic bargaining processes***by*Szidarovszky, F., Yen, J. & Lin, C.

### 1998, Volume 9, Issue 3-4

**255-258 On the HajÃ³s property for direct product of groups***by*Amin, K.**259-264 Critical sets for the quaternion group***by*Burgess, D.R.B.**265-271 Some remarks on radicals of rings***by*Chen, Y.**273-276 New approaches to Hall Paige conjecture and some of its generalizations***by*DÃ©nes, J.**277-282 Global existence and uniqueness of continuous solution of Urysohn-Volterra equation***by*Darwish, M.A.**283-310 On semi-supermanifolds***by*Duplij, S.**311-318 A characterisation theorem of the logarithmic function modulo 1***by*ErdÅ‘s, P., JoÃ³, I. & KÃ³czy, L.Ã.**319-332 Some subclasses of weakly commutative po-semigroups***by*Gao, Z.I. & Shum, K.P.**333-339 On left [resp. right] duo regular ordered semigroups***by*Kehayopulu, N.**341-350 Some structures of seminear-rings***by*Kim, H.S., Kim, E.S., Lee, D. & Park, Y.S.**351-360 The heart of some important classes of hypergroups***by*Leoreanu, V.**361-378 Canonical forms for SISO and MIMO systems***by*Mahrt, L.F. & Szidarovszky, F.**379-396 On the sm-representability of two-generated finite groups***by*Migliorini, F. & Rinaldi, S.**397-406 Cycles and $s$-characters in the sm-representation of finite groups***by*Migliorini, F. & SzÃ©p, J.**407-415 On the abelian times cyclic factorizable finite groups***by*Moscadelli, S.**417-428 Five kinds of monotone vector fields***by*NÃ©meth, S.Z.**429-439 PÃ¡l-type interpolation on the roots of Hermite polynomials***by*SebestyÃ©n, Z.F.**441-450 Central automorphisms of the minimal nonabelian $p$-groups***by*Silberberg, G.

### 1998, Volume 9, Issue 1-2

**17-27 Explicit bounds for the number of feasible solution of special PNS-problem classes***by*BlÃ¡zsik, Z., HollÃ³, C. & Imreh, B.**29-35 Modified subordination-preserving integral operators***by*BulboacÄƒ, T.**37-49 Heuristical methods for $1.5$-dimensional bin-packing***by*DÃ³sa, G.**51-59 A new matrix-splitting method and its application to $M$-matrices***by*FaragÃ³, I.**61-94 On regenerative processes and inventory control***by*Frenk, J.B.G. & Kleijn, M.J.**95-102 Approximation on the whole real line***by*GrÃ³f, J.**103-117 Approximate solution of the initial value problem for second order differential equation***by*GyÅ‘rvÃ¡ri, J. & GyÅ‘rvÃ¡ri, Z.**119-128 On the $d$-complexity of strings***by*KÃ¡sa, Z.**129-137 On the classification of the nomographic functions of four variables. I***by*Mihoc, M.**139-147 On starlike images by Alexander integral. II***by*Mocanu, P.T.**149-154 Starlike or convex functions of complex order with negative coefficients***by*Owa, S. & SÄƒlÄƒgean, G.S.**155-163 On certain subclasses of meromorphic $m$-valent close-to-convex functions***by*Pap, M.**165-170 Multivalued operators and continuous selections. The fixed points set***by*PetruÅŸel, A.**171-179 An explicit proof of the fundamental theorem of algebra in the elementary theory of real numbers***by*Robu, J.**181-192 On different types of nonlinear parabolic functional-differential equations***by*Simon, L.**193-212 Subspace methods for solving linear programming problems***by*Sonnevend, G., Stoer, J. & Zhao, G.**215-220 Differentiability with respect to lag for nonlinear pantograph equations***by*TÄƒmÄƒÅŸan, A.**221-232 The number and the sum of $P$--$k$-ary divisors of $m$ which are prime to $n$***by*TÃ³th, L.**233-240 On sinc methods for evolution equations***by*Trif, D.**241-254 Multi-differentiable functions***by*Ursescu, C.

### 1997, Volume 8, Issue 2-4

**137-146 Exponential base of special monogenic polynomials***by*Abul-Ez, M.A.**147-154 Permanents over inclines and other semirings***by*Ahn, S.S.**155-168 Hypergroup and join space induced by a fuzzy subset***by*Ameri, R. & Zahedi, M.M.**169-194 The asymptotic mesh independence principle for inexact Newton-Galerkin-like methods***by*Argyros, I.K.**195-201 Intersection properties for some families of convex sets***by*Balaj, M.**203-213 Finite groups with few central automorphism orbits***by*ChiÅŸ, M., Deaconescu, M. & Silberberg, G.**215-232 A general linear theorem of the alternative: how to get its special cases quickly***by*De Giuli, M.E., Giorgi, G. & Magnani, U.**233-246 The inverse scattering problem for some singular Sturm-Liouville operator***by*El-Reheem, Z.F.A.**247-259 On some basic properties and applications of the fractional calculus***by*El-Sayed, A.M.A.**261-273 On cyclic commutative po-semigroups***by*Gao, Z.L. & Shum, K.P.**275-280 $\Gamma$-filters and semilattice $\Gamma$-congruences in po-$\Gamma$-semigroups***by*Jun, Y.B. & Lajos, S.**281-291 On normal ordered semigroups***by*Kehayopulu, N.**293-322 Free $Z\sb p$ actions on subshifts***by*Kim, K.H. & Roush, F.W.**323-334 On nonlinear elliptic problems with discontinuities***by*Kourogenis, N.C. & Papageorgiou, N.S.**335-338 On fuzzy $(1,2)$-ideals in semigroups. II***by*Lajos, S. & Jun, Y.B.**339-346 Some improved convergence results for pseudo-monotone variational inequalities***by*Lin, G., Feng, E. & Xia, Z.**347-354 A constructive method for uniform approximation on two-dimensional interval***by*SebestyÃ©n, Z.F.**355-366 Some decompositions on Abel-Grassmann's groupoids***by*StevanoviÄ‡, N. & ProtiÄ‡, P.V.**367-375 Multi-product oligopoly-oligopsony***by*Szidarovszky, F.**377-383 Quality design by multiobjective analysis***by*VÃ¶rÃ¶s, J. & Szidarovszky, F.**385-394 A simplified trust region method with projection and convergence***by*Xia, Z. & Zhang, L.

### 1997, Volume 8, Issue 1

**1-12 The HajÃ³s $n$-property for $p$-groups***by*Amin, K.**13-28 Smoothness and perturbed Newton-like methods***by*Argyros, I.K.**29-37 On fuzzy hypergroups***by*Corsini, P. & Tofan, I.**39-52 Absolute valued algebraic algebra satisfying $(x,x,x)=0$***by*El-Mallah, M.L.**53-65 Strong and weak solutions for differential inclusions with moving constraints in Banach spaces***by*Ibrahim, A.-. & Gomaa, A.M.**67-74 Fuzzy $(1,2)$-ideals in semigroups***by*Jun, Y.B. & Lajos, S.**75-81 A note on bi- and quasi-ideals of semigroups, ordered semigroups***by*Kehayopulu, N., Lajos, S. & Lepouras, G.**83-93 A note on filters in ordered semigroups***by*Kehayopulu, N., Lajos, S. & Tsingelis, M.**95-99 Wang's conjecture on orthonormal bases***by*Shahabi, M.A. & Shahryari, M.**101-110 An age-specific optimal harvesting model***by*Shamandy, A. & Varga, Z.**111-115 Factoring abelian groups and tiling binary spaces***by*SzabÃ³, S. & Ward, C.**117-123 Network oligopolies***by*Szidarovszky, F.**125-129 A note on non-convex bargaining***by*Szidarovszky, F. & Zsitvay, T.D.**131-136 On the completeness of certain caps***by*Ughi, E.

### 1996, Volume 7, Issue 3-4

**197-214 Generalized conditions for the convergence of inexact Newton methods on Banach spaces with a convergence structure and applications***by*Argyros, I.K.**215-219 A note on radicals of Green's relations***by*BogdanoviÄ‡, S. & Ä†iriÄ‡, M.**221-222 On a characterization of finite non-soluble groups***by*DÃ©nes, J.**223-234 The generalization of the residual elimination algorithm for solving system of linear equations***by*DÃ³sa, G.**235-261 Supermatrix representations of semigroup bands***by*Duplij, S.**263-282 Shallow water waves and Korteweg-de Vries equation (oceanographical application)***by*Helal, M.A. & El-Eissa, H.N.**283-291 The finite alternating groups are $C$-groups: an elementary proof***by*Keedwell, A.D.**293-299 A note on ordered semigroups, semigroups***by*Kehayopulu, N.**301-312 Set-matrices and set-characters over finite groups***by*Migliorini, F. & SzÃ©p, J.**313-322 Transversally CR-pluriharmonic functions***by*Repetto, C.**323-331 On certain symmetry classes of tensors***by*Shahryari, M. & Shahabi Shojaei, M.A.**332-339 Finite $p$-groups whose proper factors are abelian***by*Silberberg, G.**341-342 Groups whose all commutators do not form a subgroup***by*SzabÃ³, S.**343-349 Comparison of equilibrium prices in Bertrand and mixed oligopolies***by*Szidarovszky, F.**351-359 Stabilization of a class of discrete-time uncertain singular systems***by*TakÃ¡cs, T.**361-381 On generalized linear multiple objective programming***by*Tu, T.V.**383-409 Parallel algorithm for inverting tridiagonal matrix on linear processor array***by*MilovanoviÄ‡, I.Å½., MihajloviÄ‡, M.D., MilovanoviÄ‡, E.I. & StojÄev, M.K.

### 1996, Volume 7, Issue 1-2

**1-12 Paul ErdÅ‘s, the world's most beloved mathematical genius ``leaves''***by*Vazsonyi, A.**13-24 On $k\sp *$-radical in BCI-algebras***by*Abujabal, H.A.S.**25-40 On monotonicity of nonlinear functions***by*Allevi, E.**41-51 Improved error bounds for an Euler-Chebysheff--type method***by*Argyros, I.K.**53-59 Maximal subgroups in $C\sp k\sb s$ semigroups***by*Chae, Y. & Choi, K.**61-68 On some trace formula for the Sturm-Liouville operator***by*El-Reheem, Z.F.A.**69-81 The generalized eigenvalue problem and differential equations***by*Erjaee, G.H.**83-91 On the structure of left duo, conditionally commutative semigroups***by*Guo, Y.**93-97 The factorizability of the right cancellative, right simple semigroups, without idempotent***by*GuÅ£an, M.**99-110 Constants in factorial and prolongable languages***by*Jonoska, N.**111-128 Remarks on ordered semigroups, semigroups***by*Kehayopulu, N.**129-138 A dimension group for sofic shifts***by*Kim, K.H. & Roush, F.W.**139-163 On evolution inclusions driven by $m$-accretive operators***by*Papageorgiou, N.S.**165-174 Dual structures in non-commutative differential algebras***by*Parfionov, G.N. & Zapatrin, R.R.**175-182 Simultaneous complementarity problems and their solutions via fixed points***by*Pathak, H.K., George, R., Kang, S.M. & Cho, Y.J.**183-190 Regular convolutions and $A$-additive arithmetical functions***by*Schwab, E.D.**191-195 A note on Pareto equilibria***by*Szidarovszky, F. & Eskandari, A.

### 1995, Volume 6, Issue 4

**301-312 On an application of a variant of the closed graph theorem to the solution of nonlinear equations***by*Argyros, I.K.**313-319 On solvable $T$-groups***by*Asaad, M., Ramadan, M. & Elkholi, A.M.**321-332 On some fractional functional equations***by*El-Sayed, A.M.A., El-Sayed, W.G. & Moustafa, O.L.**333-344 Note on bi-ideals in ordered semigroups***by*Kehayopulu, N.**345-348 Note on prime, weakly prime ideals in ordered semigroups, semigroups***by*Kehayopulu, N. & Tsingelis, M.**349-354 Centralizers of permutations in the partial transformation semigroup***by*Lipscomb, S. & Konieczny, J.**355-363 A note on $n\sb (2)$-permutable and $(m,n)$-commutative semigroups***by*Nagy, A.**365-370 A note on free automata***by*Park, C.**371-383 AG-test and some general properties of Abel-Grassmann's groupoids***by*ProtiÄ‡, P.V. & StevanoviÄ‡, N.**385-394 Relations refining and dividing each other***by*SzÃ¡z, Ã.**395-402 On a multiplicative structure of real vectors. I***by*SzÃ©p, J.

### 1995, Volume 6, Issue 2-3

**121-137 On the singularities of certain families of nonlinear mappings***by*Breckner, W.W. & Trif, T.**139-146 On the postdefinity of symbols in assembly languages***by*CsÃ¶rnyei, Z.**147-159 Nonnegativity of the difference schemes***by*FaragÃ³, I.**161-169 Cournot-Nash equilibrium in non-concave oligopoly games***by*ForgÃ³, F.**171-189 On classification and decidability problems of primitive words***by*HorvÃ¡th, S. & Kudlek, M.**191-201 The gradient method for a class of nonlinear operators in Hilbert space and applications to quasilinear differential equations***by*KarÃ¡tson, J.**203-210 On a class of stratified linear sets***by*KÃ¡szonyi, L.**211-216 Generalized iteration lemmata***by*Kudlek, M.**217-221 On the theory of single-image stereograms***by*Major, A.**223-229 Nomographic representation of the equations of three variables by nomograms with straight line scales. III***by*Mihoc, M.**231-238 A sufficient condition for injectivity in the complex plane***by*Mocanu, P.T.**239-250 A new algorithm for solving linear equations by residual elimination***by*MolnÃ¡rka, G. & TÃ¶rÃ¶k, B.**251-271 On two notions of generalized convexity and the boundary behaviour of the bivariate convex functions***by*NÃ©meth, A.B.**273-277 Geometric properties of normalized Bessel functions***by*Selinger, V.**279-285 An almost explicit algorithm for the incompressible Navier-Stokes equations***by*Trif, D. & Petrila, T.**287-299 A column generation algorithm to schedule identical parallel machines***by*VizvÃ¡ri, B. & Demir, R.

### 1995, Volume 6, Issue 1

**1-8 The asymptotic form of the solutions for fourth-order differential equations***by*Al-Hammadi, A.S.A.**9-23 Non-differentiable operator equations on Banach spaces with a convergence structure***by*Argyros, I.K.