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Z. Daróczy, K. Lajkó, R. L. Lovas, Gy. Maksa, and Zs. Páles: Functional equations involving means, Acta Math. Hungar., közlésre elfogadva, 2007 | Z. Daróczy: Egy matematikus vallomásai a történelemről, Emlékkönyv Orosz István 70. születésnapjára, 389--395, 2005 | L. Molnár: Non-linear Jordan triple automorphisms of sets of self-adjoint matrices and operators, Studia Math., 173(1):39--48, 2006 | Zs. Ádám, K. Lajkó, Gy. Maksa, and F. Mészáros: Sequenced problems for functional equations, Teaching Math. Comp. Sci., 4(1):179--192, 2006 | B. Brindza and Gy. Maksa: A note on non-negative information functions, Acta Acad. Paedagog. Agriensis, Sect. Mat. (N. S.), 30:31--36, 2003 | J. K. Chung, P. K. Sahoo, and L. Székelyhidi: On quadratic differences that depend on the product of arguments -- revisited, Aequationes Math., 67(3):216--224, 2004 | P. Czinder and Zs. Páles.: Minkowski-type inequalities for two variable Stolarsky means, Acta Sci. Math. (Szeged), 69(1-2):27--47, 2003 | P. Czinder and Zs. Páles: An extension of the Hermite-Hadamard inequality and anapplication for Gini and Stolarsky means, J. Inequal. Pure Appl. Math., 5(2):Article 42, pp. 8 (electronic), 2004 | Z. Daróczy: Gaussian iteration of mean values and the existence of sqrt(2), Teaching Math. Comp. Sci., 1(1):35--42, 2003 | Z. Daróczy: Quasi-arithmetic elements of a given class of means, Publ. Math. Debrecen, 65(3-4):317--322, 2004 | Z. Daróczy, G. Hajdu, and C. T. Ng: An extension theorem for a Matkowski-Suto problem, Colloq. Math., 95(2):153--161, 2003 | Z. Daróczy, Gy. Maksa, and Zs. Páles: On two variable means weighted by weight functions, Aequationes Math., 67(1-2):154--159, 2004 | Z. Daróczy and Zs. Páles: Középértékek Gauss-féle kompozíciója és a Matkowski--Suto probléma megoldása, Mat. Lapok, (3-4):1--53, 2003 | Z. Daróczy and Zs. Páles: The Matkowski--Suto problem for weighted quasi-arithmetic means, Acta Math. Hungar., 100(3):237--243, 2003 | Z. Daróczy and Zs. Páles: A Matkowski--Suto-type problem for weighted quasi-arithmetic means, Ann. Univ. Sci. Budapest. Sect. Comput., 22:69--81, 2003 | Z. Daróczy and Zs. Páles: On functional equations involving means, Publ. Math. Debrecen, 62(3-4):363--377, 2003 | A. Gilányi, K. Nikodem, and Zs. Páles.: Bernstein-Doetsch type results for quasiconvex functions, Math. Inequal. Appl., 7(2):169--175, 2004 | A. Házy: Solving functional equations with computer, In MicroCAD 2004 International Scientific Conference, vol. Section E, pp. 35--39, 2004 | A. Házy: Solving linear two variable functional equations with computer, Aequationes Math., 67:47--62, 2004 | A. Házy and Zs. Páles: On approximately midconvex functions, Bull. London Math. Soc., 36(3):339--350, 2004 | A. Járai: Measurability implies continuity for solutions of functional equations --- even with few variables, Aequationes Math., 65(3):236--266, 2003 | A. Járai, Gy. Maksa, and Zs. Páles: On Cauchy-differences that are also quasisums, Publ. Math. Debrecen, 65(3-4):381--398, 2004 | I. Kocsis: On functional equations in several variables arising in information theory, Debreceni Műsz. Közl., 1:37--52, 2003 | I. Kocsis: On the stability of a sum form functional equation in several variables, Comment. Math. Prace Mat., 44(1):67--92, 2004 | E. Kovács and L. Molnár: Preserving some numerical correspondences between Hilbert space effects, Rep. Math. Phys., 54(2):201--209, 2004 | L. Székelyhidi: Discrete Spectral Synthesis and Its Applications, Springer Monographs in Mathematics, Spriger Netherlands, 2006 | M. S. Moslehian and L. Székelyhidi: Stability of ternary homomorphisms via generalized Jensen equation, Result. Math. 49:289--300, 2006 | P. Lakatos and L. Losonczi: Self-inversive polynomials whose zeros are on the unit circle, Publ. Math. Debrecen, 65(3-4):409--420, 2004 | L. Losonczi: Equality of two variable Cauchy mean values, Aequationes Math., 65(1-2):61--81, 2003 | Gy. Maksa: Asszociativitási és biszimmetria egyenletek, MTA Doktori értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2004 | Gy. Maksa and Zs. Páles: On a composite functional equation arising in utility theory, Publ. Math. Debrecen, 65(1-2):215--220, 2004 | L. Molnár: Local automorphisms of operator algebras on Banach spaces, Proc. Amer. Math. Soc., 131(6):1867--1874, 2003 | L. Molnár: Preservers on Hilbert space effects, Linear Algebra Appl., 370:287--300, 2003, 2003 | L. Molnár: Sequential isomorphisms between the sets of von Neumann algebra effects, Acta Sci. Math. (Szeged), 69(3-4):755--772, 2003 | L. Molnár: Preserver problems on algebraic structures of linearoperators and on function spaces, MTA Doktori értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2004 | L. Molnár and M. Barczy: Linear maps on the space of all bounded observables preserving maximal deviation, J. Funct. Anal., 205(2):380--400, 2003 | L. Molnár and E. Kovács: An extension of a characterization of the automorphisms of Hilbert space effect algebras, Rep. Math. Phys. 52(1):141--149, 2003 | L. Molnár and W. Timmermann: Isometries of quantum states, J. Phys. A, 36(1):267--273, 2003 | L. Molnár and W. Timmermann: Preserving the measure of compatibility between quantum states, J. Math. Phys., 44(3):969--973, 2003 | E. Neuman and Zs. Páles: On comparison of Stolarsky and Gini means, J. Math. Anal. Appl., 278(2):274--284, 2003 | K. Nikodem and Zs. Páles: On t-convex functions, Real Anal. Exchange, 29(1):219--228, 2004 | Zs. Páles and L.-E. Persson: Hardy type inequalities for means, Bull. Austr. Math. Soc., 70(3):521--528, 2004 | Zs. Páles: On approximately convex functions, Proc. Amer. Math. Soc., 131(1):243--252, 2003 | Zs. Páles: A regularity theorem for composite functional equations, Acta Sci. Math. (Szeged), 69:591--604, 2003 | Zs. Páles and L. Székelyhidi: On approximate sandwich and decomposition theorems, Ann. Univ. Sci. Budapest. Sect. Comput., 23:59--70, 2004 | L. Székelyhidi: Functional equations on hypergroups, In Th. M. Rassias, editor, Functional equations, inequalities and applications, pages 167--181. Kluwer Acad. Publ., Dordrecht, 2003 | L. Székelyhidi: The failure of spectral synthesis on some types of discrete abelian groups, J. Math. Anal. Appl., 291(2):757--763, 2004 | L. Székelyhidi: Spectral analysis and spectral synthesis on polynomial hypergroups, Monatshefte Math., 141(1):33--43, 2004 | I. Kocsis: Összeg alakú függvényegyenletek stabilitása, PhD értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2003 | M. Bessenyei: Hermite--Hadamard-type inequalities for generalized 3-convex functions, Publ. Math. Debrecen 65(1-2):223--232, 2004 | M. Bessenyei and Zs. Páles: On generalized higher-order convexity and Hermite--Hadamardtype inequalities, Acta Sci. Math. (Szeged) 70(1-2):13--24, 2004 | Z. Boros: Két komponensű függvénycsaládok karakterizációi, Habilitációs értekezés, Matematikai és Informatikai Intézet, Debreceni Egyetem, Debrecen, 2003 | R. Badora, R. Ger, and Zs. Páles: Additive selections and the stability of the Cauchy functional equation, ANZIAM J., 44(3):323--337, 2003 | M. Bessenyei: Hermite--Hadamard-type inequalities for generalized convex functions, PhD értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2005 | M. Bessenyei and Zs. Páles: Hadamard-type inequalities for generalized convex functions, Math. Inequal. Appl., 6(3):379--392, 2003 | G. Hajdu: Investigations in the theory of functional equations, PhD értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2003 | A. Házy: Lineáris függvényegyenletek megolási módszerei és t-konvex függvények stabilitása, PhD értekezés, Matematikai Intézet, Debreceni Egyetem, Debrecen, 2005 | M. Adamek, A. Gilányi, K. Nikodem, and Zs. Páles: A note on three-parameter families and generalized convex functions, J. Math. Anal. Appl.,, 2007 | Z. Makó and Zs. Páles: On Lipschitz perturbation of monotonic functions, Acta Math. Hungar., 113(1-2):1--18, 2006 | Gy. Maksa and E. Nizsalóczki: Quasi-sums in several variables, Acta Math. Acad. Paedagog. Nyházi. (N.S.), 22(2):193--207 (electronic), 2006 | L. Losonczi: Homogeneous symmetric means of two variables, Aequationes Math., közlésre elfogadva, 2007 | Á. Bereczky and L.Székelyhidi: Spectral synthesis on torsion groups, J. Math. Anal. Appl., 304(2):607--613, 2005 | M. Bessenyei and Zs. Páles.: Hermite--Hadamard inequalities for generalized convex functions., Aequationes Math., 69(1-2):32--40, 2005 | Z. Boros and Z. Kaiser: Note on approximate ring homomorphisms in algebras over fields with, Ann. Univ. Sci. Budapest. Sect. Comput., 24:119--124, 2004 | Z. Boros and Á. Száz: Finite and conditional completeness properties of generalized ordered sets, Rostock. Math. Kolloq., (59):75--86, 2005 | P. Burai and Á. Száz: Relationships between homogeneity, subadditivity and convexity, Univ. Beograd. Publ. Elektrotehn. Fak. Ser. Mat.}, 16:77--87, 2005 | Z. Boros: Systems of generalized translation equations on a restricted domain, Aequationes Math., 67:106--116, 2004 | P. Czinder and Zs. Páles: Local monotonicity properties of two-variable Gini means and the comparison theorem revisited., J. Math. Anal. Appl., 301(2):427--438, 2005 | Z. Daróczy: Beszélgetés Aczél Jánossal, Debreceni Szemle, XII. évfoly. 3. szám, 465--481, 2004 | T. Glavosits and K. Lajkó.: The general solution of a functional equation related to the characterizations of bivariate distributions., Aequationes Math., 70(1-2):88--100, 2005 | A. Gilányi, C. T. Ng, and J. Aczél.: On a functional equation arising from comparison of utility, J. Math. Anal. Appl., 304(2):572--583, 2005 | Z. Daróczy, Gy. Maksa, and Zs. Páles.: Functional equations involving means and their Gauss composition., Proc. Amer. Math. Soc., 134(2):521--530, 2006 | Z. Daróczy and Zs. Páles.: Generalized convexity and comparison of mean values., Acta Sci. Math. (Szeged), 71(1-2):105--116, 2005 | B. Ebanks and L. Székelyhidi.: On multiplicative and additive differences., Aequationes Math., 69(1-2):97--113, 2005 | M. Győry.: Preserver problems and reflexivity problems on operator, PhD értekezés, Matematikai Intézet, Debreceni Egyetem, 2003 | M. Győry: A new proof of Wigner's theorem., Rep. Math. Phys., 54(2):159--167, 2004 | M. Győry: On the toplogical reflexivity of the isometry group of the suspension of B(H)., Studia Math., 166(3):287--303, 2005 | M. Győry: Transformations on the set of all n-dimensional subspaces of a Hilbert space preserving orthogonality., Publ. Math. Debrecen, 65(1-2):233--242, 2004 | A. Járai: Regularity of solutions of a functional equation on Lie groups., Ann. Univ. Sci. Budapest. Sect. Comput., 24:239--246, 2004 | A. Járai: Regularity Properties of Functional Equations in Several Variables, volume 8 of Adv. Math. (Dordrecht) Springer, Berlin--Heidelberg, 2005 | L. Larsson, Zs. Páles, and L.-E. Persson: Carlson type inequalities for finite sums and integrals on bounded intervals., Bull. Austr. Math. Soc., 71(2):275--284, 2005 | Gy. Maksa: CM solutions of some functional equations of associative type., Ann. Univ. Sci. Budapest. Sect. Comput., 24:125--132, 2004 | Gy. Maksa: Quasisums and generalized associativity., Aequationes Math., 69(1-2):6--27, 2005 | L. Molnár and P. Semrl: Non-linear commutativity preserving maps on selfadjoint operators., Quart. J. Math., 56: 589--595, 2005 | Z. Kaiser and Zs. Páles: An example of a stable functional equation when the Hyers iteration does not work., J. Inequal. Pure Appl. Math., 6(1):Article 14, pp. 12 (electronic), 2005 | L. Székelyhidi: Discrete spectral synthesis, Ann. Math. Inform., 32:141--152, 2005 | K. Lajkó: Függvényegyenletek feladatokban, Debreceni Egyetem, Matematikai Intézet, 2005 | K. Lajkó: Függvényegyenletek feladatokban, Pont Társadalomtudományi folyóirat 2005/1. Konferencia kötete.Matematikai Szakmódszertani különszám, ISSN 1336--1357., 2005 | Á. Orosz and L. Székelyhidi: Moment functions on polynomial hypergroups in several variables., Publ. Math. Debrecen, 65(3-4):429--438, 2004 | L. Székelyhidi: Difference equations via spectral synthesis., Ann. Univ. Sci. Budapest. Sect. Comput., 24:3--14, 2004 | L. Székelyhidi: Polynomial functions and spectral synthesis., Aequationes Math., 70(1-2):122--130, 2005 | L. Székelyhidi: Spectral synthesis and a characterization of polynomial ideals., Publ. Math. Debrecen, 66(1-2):183--195, 2005 | Z. Daróczy and G. Hajdu: On linear combinations of weighted quasi-arithmetic means., Aequationes Math., 69(1-2):58--67, 2005 | Z. Kaiser: Függvényegyenletek stabilitása absztrakt struktúrákon, PhD értekezés, Matematika Intézet, Debreceni Egyetem, 2005 | Z. Daróczy: On translative and quasi-commutative operations., Ann. Univ. Sci. Budapest. Sect. Comput., 24:15--28, 2004 | Zs. Ádám, K. Lajkó, Gy. Maksa, and F. Mészáros: Two functional equations on groups, Ann. Math. Sil., közlésre elfogadva, 2007 | L. Losonczi: Homogeneous non-symmetric means of two variables, Demonstratio Math., közlésre elfogadva, 2007 | P. Lakatos and L. Losonczi: Circular interlacing with reciprocal polynomials, Math. Inequal. Appl. közlésre elfogadva, 2007 | P. Burai and Á. Száz: Homogeneity properties of subadditive functions, Ann. Math. Inform., 32:189-201, 2005 | L. Losonczi: Sub- and superadditive integral means, J. Math. Anal. Appl., 307(2):444--454, 2005 | M. Bessenyei.: Hadamard's inequality on simplices, Amer. Math. Monthly, közlésre elfogadva, 2008 | M. Bessenyei and Zs. Páles: Characterizations of convexity via Hadamard's inequality, Math. Inequal. Appl., 9(1):53--62, 2006 | Z. Boros: An inequality for the Takagi function, Math. Inequal. Appl., közlésre elfogadva., 2007 | Z. Boros and Z. Daróczy: A composite functional equation with additive solutions, Publ. Math. Debrecen, 69(1-2):245--253, 2006 | Z. Boros and P. Erdei: A conditional equation for additive functions, Aequationes Math., 70(3):309--313, 2005 | Z. Boros and Zs. Páles: Q-subdifferential of Jensen-convex functions, J. Math. Anal. Appl., 321(1):99--113, 2006 | P. Burai: Extension theorem for a functional equation, J. Appl. Anal., 12(2):293--299, 2006 | P. Burai: A Matkowski--Suto type equation, Publ. Math. Debrecen, 70(1-2):233--247, 2007 | P. Burai and Á. Száz: Coincidence theorems for subadditive and superadditive functions, Carpathian J. Math., 21(1-2):21--26, 2005 | P. Czinder and Zs. Páles: Some comparison inequalities for Gini and Stolarsky means, Math. Inequal. Appl., 9(4):607--616, 2006 | Z. Daróczy: Functional equations involving means and Gauss compositions of means, Nonlinear Anal., 63(5-7):e417--e425, 2005 | A. Gilányi, Z. Kaiser, and Zs. Páles: Estimates to the stability of the Cauchy equation, Aequationes Math., 2007 | G. Hajdu and L. Hajdu: On an identity of Ramanujan over finitely generated domains, Acta Math. Hungar., 112(1-2):143--155, 2006 | A. Házy: On approximate t-convexity, Math. Inequal. Appl., 8(3):389--402, 2005 | A. Házy and Zs. Páles: On approximately t-convex functions, Publ. Math. Debrecen, 66(3-4):489--501, 2005 | Z. Kaiser: On stability of the Cauchy equation in normed spaces over fields with valuation, Publ. Math. Debrecen, 64(1-2):189--200, 2004 | L. Losonczi: Equality of two variable means revisited, Aequationes Math., 71(3):228--245, 2006 | L. Molnár: Selected preserver problems on algebraic structures of linear operators and on function spaces, volume 1895 of Lecture Notes in Mathematics. Springer-Verlag, Berlin, 2007 | L. Losonczi: On reciprocal polynomials with zeros of modulus one, Math. Inequal. Appl., 9(2):289--298, 2006 | L. Molnár: Linear maps on matrices preserving commutativity up to a factor, Linear Multilinear Algebra, közlésre elfogadva, 2007 | L. Molnár: Multiplicative Jordan triple isomorphisms on the self-adjoint elements of von Neumann algebras, Linear Algebra Appl., 419:586--600, 2006 | L. Molnár: A remark on the Kochen-Specker theorem and some characterizations of the determinant on sets of Hermitian matrices, Proc. Amer. Math. Soc., 134(10):2839--2848, 2006 | L. Molnár and W. Timmermann: Mixture preserving maps on von Neumann algebra effects, Lett. Math. Phys., közlésre elfogadva, 2007 | L. Molnár and W. Timmermann: Transformations on the sets of states and density operators, Linear Algebra Appl., 418(1):75--84, 2006 | L. Molnár and P. Semrl: Elementary operators on self-adjoint operators, J. Math. Anal. Appl., 327:302--309, 2007 | K. Nikodem and Zs. Páles: Generalized convexity and separation theorems, J. Convex Anal., 14(2):239--248, 2007 | Á. Orosz: Difference equations on discrete polynomial hypergroups, Adv. Difference Equ., Art. 51427, pp. 1--10, 2006 | Á. Orosz: Sine and cosine equation on discrete polynomial hypergroups, Aequationes Math., 72:225--233, 2006 | Á. Orosz and L. Székelyhidi: Moment functions on polynomial hypergroups, Arch. Math. (Basel), 85(2):141--150, 2005 | Zs. Páles: Regularity problems and results concerning composite functional equations in several variables, Tatra Mt. Math. Publ., 34(2):289--306, 2006 | L. Székelyhidi: Functional equations on Sturm-Liouville hypergroups, Math. Pannon., 17(2):169--182, 2006 |
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