## Lectures on International Conferences

 We hope that we will meet at the following conference in 2020. Harmonic Analysis and Related Fields Conference, Visegrád, Hungary, 11-13 June, 2019. Blahota, I.,  Θ-means in different spaces, Nagy, K., Properties of the maximal operator of Walsh-Kaczmarz-Marcinkiewicz means, Toledo, R., Multistep method for solving differential equations numerically by Walsh functions, Second Spring Seminar on Analysis Workshop, Debrecen, Hungary, 4 April, 2019. Nagy, K., End point theorems for Fejér means with respect to Walsh–Kaczmarz system. th International Conference on Operational Research, KOI 2018, Croatia, Zadar, September 26-28, 2018. Bajalinov, E., On the Optimized Polynomial Smoothing Approach to the Seasonal Time Series Analysis.  Numbers, Functions, Equations 2018, Hajdúszoboszló, Hungary, August 26 - September 1, 2018.  Blahota, I.,  Approximation by Theta-means, Nagy, K., Cone-like restricted summability of the two-dimensional Walsh- and Walsh-Kaczmarz means, Toledo, R., Numerical solution of linear differential equations by Walsh polynomials approach, 6th workshop on Fourier analysis and related fields, Pécs, Hungary, 24-30 August 2017. Nagy, K., Some properties of Marcinkiewicz means with respect to Walsh system Blahota, I., Approximation by θ-means of Walsh-Fourier series Toledo, R., The boundedness of the L^1-norm of Walsh-Fejér kernels Georgian-Hungarian joint workshop on Dyadic Analysis and Related Fields, 2015, Nyíregyháza, Hungary, May 30 - June 05, 2015. Blahota, I., Tephnadze, G., Nagy, K., Fejer and Marcinkiewicz means of Vilenkin-Fourier series Gát, G., The weighted Walsh system and other stuff Toledo, R.,  Application of Walsh functions to solve differential equations , Barcelona, Spain July 13-14. 2014 Bajalinov, E., Duleba, Sz.: On a time series forecasting method based on Walsh transform.  Conference on Dyadic Analysis and Related Fields with Applications (DARFA14), Nyíregyháza, Hungary, June 1-6, 2014 dedicated to the 75 birthday of Professor Ferenc Schipp, to the 70 th birthday of Professor William Wade and to the 65 th birthday of Professor Péter Simon. dedicated to the 80th birthday of Academician Levan Zhizhiashvili, Bazaleti (Georgia) October 23-28, 2013. Gát, Gy., Summation of Walsh-Fourier series, convergence and divergence. Nagy, K.,  Marcinkiewicz summability of two-dimensional Fourier series of Walsh-like systems. Toledo, R., Approximation of series on the complete product of finite nonabelian groups Conference on Dyadic Analysis and Applications, Nyíregyháza, Hungary, Oktober 01-02, 2013. Gát, Gy., Fejér (and other) means of Walsh and Vilenkin-Fourier series. Nagy, K.,  On the Marcinkiewicz means of Walsh-Kaczmarz-Fourier series. Toledo, R., Computer algebra packages to study locally constant systems. 4th Workshop on Fourier Analysis and Related Fields, 26-30 August, 2013, Budapest Gát, Gy., Summation of one and two-dimensional Walsh-Fourier series. IV. Jaen Conference on Approximation Theory, Úbeda, Jaén, Spain, june 23-27, 2013. Toledo, R., Representative product systems on the complete product of quaternion groups (poster). International Conference Constructive Theory of Functions – 2013 Sozopol, June 9–15, 2013. Blahota, I., Maximal propertiies of kernels for Vilenkin-like systems. Gát, Gy., Subsequences of partial sums of one and two-dimensional Walsh-Fourier series. Nagy, K.,  Restricted summability of the two-dimensional Walsh- and Walsh-Kaczmarz-Fejér means. Toledo, R., Convergence in L^p-norm of Fourier series on the complete product of quaternion groups with bounded orders. Conference on Inequalities and Applications' 10, In Hotel, Hajdúszoboszló, Hungary, September 19-25, 2010. Nagy, K., On the Walsh-Marcinkiewicz means and kernels. I Jaen conference on Approximation, Úbeda, july 4-9, 2010. Toledo, R., Recent developments on approximation theory with respect to representative product systems. 6th International Conference on Functional Analysis and Approximation Theory, FAAT 2009, Acquafredda di Maratea, September 24 - 30, 2009. Blahota, I., On boundedness of maximal operators with respect to Vilenkin systems. Gát, Gy., Approximation properties of one and two dimensional Fejér and Marczinkiewicz means of Fourier series with respect to Walsh and Vilenkin systems. Nagy, K., Approximation by Nörlund means of Walsh-Kaczmarz-Fourier series. Toledo, R., Representative product systems. 3rd Workshop in Fourier Analysis and Related Fields, Budapest, Hungary, September 17-23, 2009. Blahota, I., Maximal operators on Vilenkin systems. Gát, Gy., One and two dimensional Fejér means on the Walsh and Vilenkin groups. Nagy, K., Approximation by Nörlund means of Walsh-Fourier series. Toledo, R., The maximal value of Dirichlet kernels with respect to representative product systems. Workshop on Dyadic Analysis and Related Areas with Applications, Dobogókõ, Hungary, June 7–10, 2009. Blahota, I., On maximal operators with respect to Walsh and Vilenkin systems. Gát, Gy., Some convergence and divergence results with respect to summation of Fourier series on one and two-dimensional unbounded Vilenkin groups. Nagy, K., Uniform and L-convergence of the Nörlund logarithmic means of Walsh-Kaczmarz-Fourier series. Toledo, R., Convergence in $L^p$-norm of Cesaro means on the complete product of finite noncommutative groups. Discrete Analysis and Applications, Thessaloniki, Greece, September 27-29, 2008. International Workshop on Orthogonal Polynomials and Approximation Theory 2008, Madrid, Spain, September 8-12, 2008.  Mathematical Inequalities and Applications 2008, Trogir-Split, Croatia, June 8-14, 2008. Second Workshop on  Extremal Problems in Fourier analysis, Budapest, Hungary, September 18-24, 2007. Blahota, I., Maximal operators of Fejér and Marcinkiewicz means on Vilenkin systems. Gát, G., Convergence of Cesaro means of Fourier series. Nagy, K., On the $L^1$-norm of the weigted maximal function of Fejér kernels with respect to the Walsh-Kaczmarz system. Toledo, R., On the convergence in $L^p$-norm of Cesaro means with respect to representative product systems. Summer school: New trends and directions in harmonic analysis,  approximation theory, Inzell, Germany, September 17 – 21, 2007. International Conference in Fourier and Complex Analysis: Classical Problems- Current View, Protaras, Cyprus, 06-10. May, 2006. Blahota, I., On the maximal operator of Fejér and Marcinkiewicz means with respect to the Vilenkin system. Gát, G., Some convergence properties of Fourier series with respect to the weighted Walsh system. Nagy, K., The boundedness of the two-dimensional Marcinkiewicz-Fejér means with respect to the Walsh-Kaczmarz system. Toledo, R., Convergence of Walsh-Fourier series of functions with bounded osscillacion. Fourier Analysis Extremal Problems and Approximation, Budapest, Hungary, September 19-25, 2005. Blahota, I., Some approximation properties of Nörlund logarithmic means on Vilenkin groups, Gát, G. Maximal convergence spaces of some operators related to the Fourier series of two-variable functions on the Walsh group, Nagy, K., Convergence properties of the Marcinkiewicz means of integrable functions with respect to the Walsh-Kaczmarz system, Toledo, R., Negative results concerning Fourier series on the complete product of S3.   Constructive Theory Of Functions, Varna, Bulgary, June 1-7, 2005. Blahota, I., Norm convergence of logarithmic means of Fourier series on unbounded Vilenkin groups, Gát, G., On convergence properties of logarithmic means of Walsh-Fourier series, Nagy, K., Almost everywhere convergence of the two-dimensional Marcinkiewicz means with respect to the Walsh-Kaczmarz system, Toledo, R., Fourier analysis on the complete product of finite groups. 5-th International Conference on Functional and Approximation Theory, Maratea, Italy,  June 16-23, 2004. Blahota, I., On Vilenkin-like systems, Gát, G., On a.e. summability of Fourier series on Vilenkin groups, Nagy, K., Some convergence properties of the Walsh-Kaczmarz system, Toledo, R., Convergence in norm on the complete product of finite groups. Dyadic Analysis with Applications and Generalizations, Balatonszemes, Hungary, June 12-15, 2003. Nagy, K., Norm convergence of Fejér means on $\mathbf {R}^+$ with respect to Walsh-Kaczmarz system, Toledo, R., On the Dirichlet kernels with respect to representative product system Alexits Memorial Conference, Budapest, Hungary, August 9-14, 1999. Blahota, I., Investigation with respect to the two-dimensional Vilenkin space, Nagy, K., The (H,L)-boundedness of the Sunouchi operator with respect to Walsh-Kaczmarz system, Toledo, R., On the convergence of Fourier series on CTD groups. Gyula Strommer national memorial conference, Balatonfüred, Hungary, May 1-5, 1999. Toledo. R., Recent developments on approximation theory on CTD groups. Numbers, Functions, Equations '98, Noszvaj, Hungary,  May 31-June 6, 1998.  Blahota, I., On a norm inequality with respect to Vilenkin-like systems, Gát, G., Nagy, K., Investigation of the Sunouchi operator with respect to the Walsh-Kaczmarz system. International Conference on Approximation and Optimization, Cluj-Napoca, Romania, July 29-August 1, 1996.  Nagy, K., On the (H,L) typeness of the maximal operator of the derivate on two-dimensional Vilenkin groups. Development and application of mathematical methods in scientific-technical investigations. Lviv, Ukraina,  Oktober 1995. Toledo, R., On Hardy-norm of operators with property D. PAMM Conference, Göd,  Oktober 21-24, 1992. Blahota, I., On the theorem of Fridli and Simon with respect to some Vilenkin-like systems. PAMM Conference, Balatonfüred, May 1991. Toledo, R., Estimates of the Fourier coefficient with respect to $\Psi\alpha$  systems on Vilenkin groups.