Goginava, Ushangi; Nagy, Károly Two-dimensional martingale transforms and their applications in summability of Walsh-Fourier series. (English) Zbl 1517.42027 J. Geom. Anal. 33, No. 8, Paper No. 245, 19 p. (2023). MSC: 42C10 42B08 60G46 60G42 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, J. Geom. Anal. 33, No. 8, Paper No. 245, 19 p. (2023; Zbl 1517.42027) Full Text: DOI
Goginava, Ushangi; Nagy, Károly Some properties of the Walsh-Nörlund means. (English) Zbl 1514.42033 Quaest. Math. 46, No. 2, 301-334 (2023). Reviewer: Ghanshyam Bhatt (Nashville) MSC: 42C10 42A20 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Quaest. Math. 46, No. 2, 301--334 (2023; Zbl 1514.42033) Full Text: DOI
Goginava, Ushangi; Nagy, Károly Strong summability of double Vilenkin-Fourier series. (English) Zbl 07672126 Acta Sci. Math. 88, No. 3-4, 673-696 (2022). Reviewer: Joseph Lakey (Las Cruces) MSC: 42C10 46E30 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Acta Sci. Math. 88, No. 3--4, 673--696 (2022; Zbl 07672126) Full Text: DOI
Blahota, István; Nagy, Károly Approximation by Marcinkiewicz-type matrix transform of Vilenkin-Fourier series. (English) Zbl 1492.42030 Mediterr. J. Math. 19, No. 4, Paper No. 165, 27 p. (2022). MSC: 42C10 PDFBibTeX XMLCite \textit{I. Blahota} and \textit{K. Nagy}, Mediterr. J. Math. 19, No. 4, Paper No. 165, 27 p. (2022; Zbl 1492.42030) Full Text: DOI
Nagy, Károly; Salim, Mohamed On the maximal operators of weighted Marcinkiewicz type means of two-dimensional Walsh-Fourier series. (English) Zbl 1482.42071 Georgian Math. J. 29, No. 1, 71-82 (2022). MSC: 42C10 42B25 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{M. Salim}, Georgian Math. J. 29, No. 1, 71--82 (2022; Zbl 1482.42071) Full Text: DOI
Blahota, István; Nagy, Károly Approximation by matrix transform of Vilenkin-Fourier series. (English) Zbl 1499.42109 Publ. Math. Debr. 99, No. 1-2, 223-242 (2021). Reviewer: Joseph Lakey (Las Cruces) MSC: 42B35 42C05 47B90 PDFBibTeX XMLCite \textit{I. Blahota} and \textit{K. Nagy}, Publ. Math. Debr. 99, No. 1--2, 223--242 (2021; Zbl 1499.42109) Full Text: DOI
Blahota, I.; Nagy, K.; Salim, M. Approximation by \(\theta\)-means of Walsh-Fourier series in dyadic Hardy spaces and dyadic homogeneous Banach spaces. (English) Zbl 1488.42120 Anal. Math. 47, No. 2, 285-309 (2021). Reviewer: Joseph Lakey (Las Cruces) MSC: 42C10 42B35 42C05 47B90 PDFBibTeX XMLCite \textit{I. Blahota} et al., Anal. Math. 47, No. 2, 285--309 (2021; Zbl 1488.42120) Full Text: DOI
Nagy, Károly; Salim, Mohamed Transference method for cone-like restricted summability of the two-dimensional Walsh-like systems. (English) Zbl 1465.42030 Math. Inequal. Appl. 24, No. 1, 219-234 (2021). MSC: 42C10 43A75 42B08 42B30 42B25 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{M. Salim}, Math. Inequal. Appl. 24, No. 1, 219--234 (2021; Zbl 1465.42030) Full Text: DOI
Gogolashvili, Nata; Nagy, Károly; Tephnadze, George Strong convergence theorem for Walsh-Kaczmarz-Fejér means. (English) Zbl 1456.42035 Mediterr. J. Math. 18, No. 2, Paper No. 37, 17 p. (2021). MSC: 42C10 42B25 60G46 PDFBibTeX XMLCite \textit{N. Gogolashvili} et al., Mediterr. J. Math. 18, No. 2, Paper No. 37, 17 p. (2021; Zbl 1456.42035) Full Text: DOI arXiv
Nagy, Károly; Salim, Mohamed Restricted summability of the multi-dimensional Cesáro means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1438.42056 Publ. Math. Debr. 94, No. 3-4, 381-394 (2019). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{M. Salim}, Publ. Math. Debr. 94, No. 3--4, 381--394 (2019; Zbl 1438.42056) Full Text: DOI arXiv
Blahota, István; Nagy, Károly; Tephnadze, George Approximation by Marcinkiewicz \(\Theta \)-means of double Walsh-Fourier series. (English) Zbl 1425.42030 Math. Inequal. Appl. 22, No. 3, 837-853 (2019). MSC: 42C10 PDFBibTeX XMLCite \textit{I. Blahota} et al., Math. Inequal. Appl. 22, No. 3, 837--853 (2019; Zbl 1425.42030) Full Text: DOI
Blahota, István; Nagy, Karoly; Persson, Lars-Erik; Tephnadze, George A sharp boundedness result for restricted maximal operators of Vilenkin-Fourier series on martingale Hardy spaces. (English) Zbl 1440.42127 Georgian Math. J. 26, No. 3, 351-360 (2019). MSC: 42C10 42B25 PDFBibTeX XMLCite \textit{I. Blahota} et al., Georgian Math. J. 26, No. 3, 351--360 (2019; Zbl 1440.42127) Full Text: DOI arXiv
Blahota, I.; Nagy, K. Approximation by \(\Theta\)-means of Walsh-Fourier series. (English) Zbl 1399.42074 Anal. Math. 44, No. 1, 57-71 (2018). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 PDFBibTeX XMLCite \textit{I. Blahota} and \textit{K. Nagy}, Anal. Math. 44, No. 1, 57--71 (2018; Zbl 1399.42074) Full Text: DOI
Blahota, István; Nagy, Károly On the restricted summability of the multi-dimensional Vilenkin-Cesàro means. (English) Zbl 1379.42013 J. Math. Inequal. 11, No. 4, 997-1006 (2017). MSC: 42C10 42B08 43A75 42B30 PDFBibTeX XMLCite \textit{I. Blahota} and \textit{K. Nagy}, J. Math. Inequal. 11, No. 4, 997--1006 (2017; Zbl 1379.42013) Full Text: DOI
Nagy, K. Approximation of the quadratic partial sums of double Walsh-Kaczmarz-Fourier series by Nörlund means. (English) Zbl 1404.42055 Ukr. Math. J. 68, No. 1, 94-114 (2016) and Ukr. Mat. Zh. 68, No. 1, 87-105 (2016). Reviewer: Alexei Lukashov (Saratov) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Ukr. Math. J. 68, No. 1, 94--114 (2016; Zbl 1404.42055) Full Text: DOI
Nagy, K.; Tephnadze, G. The Walsh-Kaczmarz-Marcinkiewicz means and Hardy spaces. (English) Zbl 1399.42081 Acta Math. Hung. 149, No. 2, 346-374 (2016). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{G. Tephnadze}, Acta Math. Hung. 149, No. 2, 346--374 (2016; Zbl 1399.42081) Full Text: DOI
Goginava, U.; Nagy, K. Strong approximation by Marcinkiewicz means of twodimensional Walsh-Kaczmarz-Fourier series. (English) Zbl 1389.42057 Anal. Math. 42, No. 2, 143-157 (2016). Reviewer: György Gát (Nyíregyháza) MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Anal. Math. 42, No. 2, 143--157 (2016; Zbl 1389.42057) Full Text: DOI arXiv
Goginava, Ushangi; Nagy, Karoly Weak type inequality for the maximal operator of Walsh-Kaczmarz-Marcinkiewicz means. (English) Zbl 1363.42031 Acta Math. Sci., Ser. B, Engl. Ed. 36, No. 2, 359-370 (2016). MSC: 42B25 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Acta Math. Sci., Ser. B, Engl. Ed. 36, No. 2, 359--370 (2016; Zbl 1363.42031) Full Text: DOI
Nagy, Károly; Tephnadze, George Strong convergence theorem for Walsh-Marcinkiewicz means. (English) Zbl 1338.42037 Math. Inequal. Appl. 19, No. 1, 185-195 (2016). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 60G42 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{G. Tephnadze}, Math. Inequal. Appl. 19, No. 1, 185--195 (2016; Zbl 1338.42037) Full Text: DOI
Goginava, U.; Nagy, K. The two-dimensional Fejér means on diagonal Hardy space. (English) Zbl 1363.42047 Period. Math. Hung. 70, No. 2, 248-256 (2015). Reviewer: György Gát (Nyíregyháza) MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Period. Math. Hung. 70, No. 2, 248--256 (2015; Zbl 1363.42047) Full Text: DOI
Gát, G.; Nagy, K. On the maximal operators of Fejér means with respect to the character system of the group of 2-adic integers in Hardy spaces. (English) Zbl 1329.42029 Math. Notes 98, No. 1, 68-77 (2015). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 60G42 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Math. Notes 98, No. 1, 68--77 (2015; Zbl 1329.42029) Full Text: DOI
Nagy, Károly On the restricted summability of Walsh-Kaczmarz-Fejér means. (English) Zbl 1310.42017 Georgian Math. J. 22, No. 1, 131-140 (2015). Reviewer: Delfina Roux (Milano) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Georgian Math. J. 22, No. 1, 131--140 (2015; Zbl 1310.42017) Full Text: DOI
Nagy, Károly The maximal operator of Marcinkiewicz-Fejér means with respect to Walsh-Kaczmarz-Fourier series. (English) Zbl 1311.42069 Math. Inequal. Appl. 18, No. 1, 97-110 (2015). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 42B08 PDFBibTeX XMLCite \textit{K. Nagy}, Math. Inequal. Appl. 18, No. 1, 97--110 (2015; Zbl 1311.42069) Full Text: DOI
Nagy, Károly; Tephnadze, George Approximation by Marcinkiewicz means of Walsh-Kaczmarz-Fourier series in the Hardy space \(H_{2/3}\). (English) Zbl 1332.42020 Bull. TICMI 18, No. 1, 110-121 (2014). Reviewer: Sergey S. Volosivets (Saratov) MSC: 42C10 43A70 43A17 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{G. Tephnadze}, Bull. TICMI 18, No. 1, 110--121 (2014; Zbl 1332.42020)
Nagy, Károly; Tephnadze, George Approximation by Walsh-Marcinkiewicz means on the Hardy space \(H_{2/3}\). (English) Zbl 1311.42070 Kyoto J. Math. 54, No. 3, 641-652 (2014). Reviewer: Jeremy Wade (Pittsburg) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{G. Tephnadze}, Kyoto J. Math. 54, No. 3, 641--652 (2014; Zbl 1311.42070) Full Text: DOI Euclid
Nagy, K. Almost everywhere convergence of cone-like restricted two-dimensional Fejér means with respect to Vilenkin-like systems. (English) Zbl 1302.42044 St. Petersbg. Math. J. 25, No. 4, 605-614 (2014) and Algebra Anal. 25, No. 4, 125-138 (2013). MSC: 42C10 43A75 40G05 PDFBibTeX XMLCite \textit{K. Nagy}, St. Petersbg. Math. J. 25, No. 4, 605--614 (2014; Zbl 1302.42044) Full Text: DOI
Nagy, Károly On the restricted summability of two-dimensional Walsh-Fejér means. (English) Zbl 1340.42068 Publ. Math. Debr. 85, No. 1-2, 113-122 (2014). Reviewer: Alexei Lukashov (Saratov) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Publ. Math. Debr. 85, No. 1--2, 113--122 (2014; Zbl 1340.42068) Full Text: DOI
Nagy, Károly; Tephnadze, George Walsh-Marcinkiewicz means and Hardy spaces. (English) Zbl 1300.42003 Cent. Eur. J. Math. 12, No. 8, 1214-1228 (2014). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 43A75 42B30 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{G. Tephnadze}, Cent. Eur. J. Math. 12, No. 8, 1214--1228 (2014; Zbl 1300.42003) Full Text: DOI
Goginava, Ushangi; Nagy, Károly On the boundedness of the maximal operators of double Walsh-logarithmic means of Marcinkiewicz type. (English) Zbl 1340.42067 Math. Slovaca 63, No. 4, 839-848 (2013). Reviewer: György Gát (Nyiregyháza) MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Math. Slovaca 63, No. 4, 839--848 (2013; Zbl 1340.42067) Full Text: DOI
Nagy, Károly; Goginava, Ushangi Maximal operators of Walsh-Kaczmarz logarithmic means. (English) Zbl 1290.42055 Complex Var. Elliptic Equ. 58, No. 9, 1173-1182 (2013). Reviewer: Karen Keryan (Yerevan) MSC: 42C10 42B25 PDFBibTeX XMLCite \textit{K. Nagy} and \textit{U. Goginava}, Complex Var. Elliptic Equ. 58, No. 9, 1173--1182 (2013; Zbl 1290.42055) Full Text: DOI
Nagy, Károly On the maximal operator of Marcinkiewicz-Fejér means of the two-dimensional Walsh-Kaczmarz system. (English) Zbl 1268.42050 Georgian Math. J. 20, No. 2, 319-332 (2013). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Georgian Math. J. 20, No. 2, 319--332 (2013; Zbl 1268.42050) Full Text: DOI
Nagy, Károly On the \(L^{1}\) norm of the weighted maximal function of Walsh-Marcinkiewicz kernels. (English) Zbl 1253.42026 Bandle, Catherine (ed.) et al., Inequalities and Applications ’10. Dedicated to the memory of Wolfgang Walter. Selected papers of the 2nd conference on inequalities and applications, Hajdúszoboszló, Hungary, September 19–25, 2010. Basel: Birkhäuser (ISBN 978-3-0348-0248-2/hbk; 978-3-0348-0249-9/ebook). ISNM. International Series of Numerical Mathematics 161, 255-268 (2012). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, ISNM, Int. Ser. Numer. Math. 161, 255--268 (2012; Zbl 1253.42026) Full Text: DOI
Nagy, Károly Approximation by Cesàro means of negative order of double Walsh-Kaczmarz-Fourier series. (English) Zbl 1256.42042 Tohoku Math. J. (2) 64, No. 3, 317-331 (2012). MSC: 42C10 41A30 PDFBibTeX XMLCite \textit{K. Nagy}, Tôhoku Math. J. (2) 64, No. 3, 317--331 (2012; Zbl 1256.42042) Full Text: DOI Euclid
Goginava, Ushangi; Nagy, Károly Marcinkiewicz-Fejér means of double conjugate Walsh-Kaczmarz-Fourier series and Hardy spaces. (English) Zbl 1250.42083 Turk. J. Math. 36, No. 2, 281-290 (2012). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 60G42 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Turk. J. Math. 36, No. 2, 281--290 (2012; Zbl 1250.42083)
Nagy, Károly Approximation by Nörlund means of double Walsh-Fourier series for Lipschitz functions. (English) Zbl 1243.42038 Math. Inequal. Appl. 15, No. 2, 301-322 (2012). Reviewer: Ushangi Goginava (Tbilisi) MSC: 42C10 42B08 PDFBibTeX XMLCite \textit{K. Nagy}, Math. Inequal. Appl. 15, No. 2, 301--322 (2012; Zbl 1243.42038) Full Text: DOI
Mező, István; Nagy, Károly Integrals of weighted maximal logarithmic kernels on bounded Vilenkin groups. (English) Zbl 1265.42097 Period. Math. Hung. 64, No. 1, 89-99 (2012). Reviewer: Sergey S. Volosivets (Saratov) MSC: 42C10 PDFBibTeX XMLCite \textit{I. Mező} and \textit{K. Nagy}, Period. Math. Hung. 64, No. 1, 89--99 (2012; Zbl 1265.42097) Full Text: DOI Link
Goginava, Ushangi; Nagy, Károly Convergence in measure of logarithmic means of quadratical partial sums of double Walsh-Kaczmarz-Fourier series. (English) Zbl 1231.42025 J. Funct. Spaces Appl. 2012, Article ID 582726, 15 p. (2012). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, J. Funct. Spaces Appl. 2012, Article ID 582726, 15 p. (2012; Zbl 1231.42025) Full Text: DOI arXiv
Nagy, Károly Almost everywhere convergence of cone-like restricted double Fejér means on compact totally disconnected groups. (English) Zbl 1265.43006 Acta Math. Acad. Paedagog. Nyházi. (N.S.) 27, No. 2, 267-277 (2011). MSC: 43A75 43A55 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Acta Math. Acad. Paedagog. Nyházi. (N.S.) 27, No. 2, 267--277 (2011; Zbl 1265.43006)
Goginava, Ushangi; Nagy, Károly On the maximal operator of Walsh-Kaczmarz-Fejér means. (English) Zbl 1249.42011 Czech. Math. J. 61, No. 3, 673-686 (2011). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Czech. Math. J. 61, No. 3, 673--686 (2011; Zbl 1249.42011) Full Text: DOI EuDML Link
Nagy, Károly On the maximal operator of Walsh-Marcinkiewicz means. (English) Zbl 1249.42013 Publ. Math. Debr. 78, No. 3-4, 633-646 (2011). Reviewer: Robert E. Zink (Lafayette) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Publ. Math. Debr. 78, No. 3--4, 633--646 (2011; Zbl 1249.42013) Full Text: DOI
Gát, György; Nagy, Károly On the logarithmic summability of Fourier series. (English) Zbl 1221.42049 Georgian Math. J. 18, No. 2, 237-248 (2011). Reviewer: Kôzô Yabuta (Nishinomiya) MSC: 42C10 42B08 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Georgian Math. J. 18, No. 2, 237--248 (2011; Zbl 1221.42049) Full Text: DOI
Nagy, Károly Approximation by Nörlund means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1210.42043 Georgian Math. J. 18, No. 1, 147-162 (2011). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Georgian Math. J. 18, No. 1, 147--162 (2011; Zbl 1210.42043) Full Text: DOI
Nagy, Károly Approximation by weighted means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1470.42053 Proceedings of the sixth international conference on functional analysis and approximation theory, Acquafredda di Maratea, Potenza, Italy, September 24–30, 2009. Palermo: Circolo Matematico di Palermo. Suppl. Rend. Circ. Mat. Palermo (2) 82, 387-406 (2010). MSC: 42C10 42B10 PDFBibTeX XMLCite \textit{K. Nagy}, Suppl. Rend. Circ. Mat. Palermo (2) 82, 387--406 (2010; Zbl 1470.42053)
Nagy, Károly Uniform and \(L\)-convergence of the Nörlund logarithmic means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1240.42134 Ann. Univ. Sci. Budap. Rolando Eötvös, Sect. Comput. 33, 297-319 (2010). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Ann. Univ. Sci. Budap. Rolando Eötvös, Sect. Comput. 33, 297--319 (2010; Zbl 1240.42134) Full Text: Link
Nagy, Károly Approximation by Nörlund means of quadratical partial sums of double Walsh-Fourier series. (English) Zbl 1240.42133 Anal. Math. 36, No. 4, 299-319 (2010). Reviewer: István Mező (Debrecen) MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Anal. Math. 36, No. 4, 299--319 (2010; Zbl 1240.42133) Full Text: DOI
Nagy, Károly Approximation by weighted means of cubical partial sums of double Walsh-Fourier series. (English) Zbl 1226.42021 Jaen J. Approx. 2, No. 2, 147-161 (2010). Reviewer: Yang Dachun (Beijing) MSC: 42C10 42B10 PDFBibTeX XMLCite \textit{K. Nagy}, Jaen J. Approx. 2, No. 2, 147--161 (2010; Zbl 1226.42021)
Goginava, Ushangi; Nagy, Károly Weak type inequality for logarithmic means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1219.42018 Real Anal. Exch. 35(2009-2010), No. 2, 445-462 (2010). Reviewer: Joseph Lakey (Las Cruces) MSC: 42C10 42B08 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Real Anal. Exch. 35, No. 2, 445--462 (2010; Zbl 1219.42018) Full Text: DOI
Nagy, Károly Approximation by Cesàro means of negative order of Walsh-Kaczmarz-Fourier series. (English) Zbl 1216.42006 East J. Approx. 16, No. 3, 297-311 (2010). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, East J. Approx. 16, No. 3, 297--311 (2010; Zbl 1216.42006)
Gát, György; Nagy, Károly Pointwise convergence of cone-like restricted two-dimensional Fejér means of Walsh-Fourier series. (English) Zbl 1206.42033 Acta Math. Sin., Engl. Ser. 26, No. 12, 2295-2304 (2010). MSC: 42C10 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Acta Math. Sin., Engl. Ser. 26, No. 12, 2295--2304 (2010; Zbl 1206.42033) Full Text: DOI
Goginava, U.; Nagy, K. On the maximal operator of \((C,\alpha)\)-means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1224.42077 Ukr. Mat. Zh. 62, No. 2, 158-166 (2010) and in Ukr. Math. J. 62, No. 2, 175-185 (2010). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Ukr. Mat. Zh. 62, No. 2, 158--166 (2010; Zbl 1224.42077) Full Text: DOI
Goginava, Ushangi; Nagy, Károly Maximal operators of Fejér means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1194.42034 J. Funct. Spaces Appl. 8, No. 2, 181-200 (2010). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, J. Funct. Spaces Appl. 8, No. 2, 181--200 (2010; Zbl 1194.42034) Full Text: DOI
Gát, György; Goginava, Ushangi; Nagy, Károly On the Marcinkiewicz-Fejér means of double Fourier series with respect to the Walsh-Kaczmarz system. (English) Zbl 1274.42068 Stud. Sci. Math. Hung. 46, No. 3, 399-421 (2009). MSC: 42C10 PDFBibTeX XMLCite \textit{G. Gát} et al., Stud. Sci. Math. Hung. 46, No. 3, 399--421 (2009; Zbl 1274.42068) Full Text: DOI
Nagy, Károly Almost everywhere convergence of a subsequence of the Nörlund logarithmic means of Walsh-Kaczmarz-Fourier series. (English) Zbl 1185.42030 J. Math. Inequal. 3, No. 4, 499-510 (2009). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, J. Math. Inequal. 3, No. 4, 499--510 (2009; Zbl 1185.42030) Full Text: DOI Link Link
Gát, György; Nagy, Károly On the \((C, \alpha )\)-means of quadratic partial sums of double Walsh-Kaczmarz-Fourier series. (English) Zbl 1178.42026 Georgian Math. J. 16, No. 3, 489-506 (2009). MSC: 42C10 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Georgian Math. J. 16, No. 3, 489--506 (2009; Zbl 1178.42026) Full Text: Link
Goginava, Ushangi; Nagy, Károly On the maximal operator of the Marcinkiewicz-Fejér means of double Walsh-Kaczmarz-Fourier series. (English) Zbl 1212.42073 Publ. Math. Debr. 75, No. 1-2, 95-104 (2009). Reviewer: Vanna Zanelli (Modena) MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Publ. Math. Debr. 75, No. 1--2, 95--104 (2009; Zbl 1212.42073)
Nagy, Károly On the \(L^1\) norm of the weighted maximal function of Fejér kernels with respect to the Walsh-Kaczmarz system. (English) Zbl 1159.42311 JIPAM, J. Inequal. Pure Appl. Math. 9, No. 1, Paper No. 16, 9 p. (2008). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, JIPAM, J. Inequal. Pure Appl. Math. 9, No. 1, Paper No. 16, 9 p. (2008; Zbl 1159.42311) Full Text: EuDML EMIS
Goginava, Ushangi; Nagy, Károly On the Marcinkiewicz-Fejér means of double Walsh-Kaczmarz-Fourier series. (English) Zbl 1164.42321 Math. Pannonica 19, No. 1, 49-56 (2008). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Math. Pannonica 19, No. 1, 49--56 (2008; Zbl 1164.42321)
Goginava, Ushangi; Nagy, Károly On the Fejér means of double Fourier series with respect to the Walsh-Kaczmarz system. (English) Zbl 1174.42337 Period. Math. Hung. 55, No. 1, 11-18 (2007). MSC: 42C10 PDFBibTeX XMLCite \textit{U. Goginava} and \textit{K. Nagy}, Period. Math. Hung. 55, No. 1, 11--18 (2007; Zbl 1174.42337) Full Text: DOI
Nagy, K. On the two-dimensional Marcinkiewicz means with respect to Walsh–Kaczmarz system. (English) Zbl 1105.42021 J. Approximation Theory 142, No. 2, 138-165 (2006). MSC: 42C10 42B25 PDFBibTeX XMLCite \textit{K. Nagy}, J. Approx. Theory 142, No. 2, 138--165 (2006; Zbl 1105.42021) Full Text: DOI
Gát, G.; Goginava, U.; Nagy, K. On \((H_{pq},L_{pq})\)-type inequality of maximal operator of Marcinkiewicz-Fejér means of double Fourier series with respect to the Kaczmarz system. (English) Zbl 1129.42355 Math. Inequal. Appl. 9, No. 3, 473-483 (2006). MSC: 42B20 42C10 PDFBibTeX XMLCite \textit{G. Gát} et al., Math. Inequal. Appl. 9, No. 3, 473--483 (2006; Zbl 1129.42355) Full Text: DOI
Nagy, Karoly Some convergence properties of the Walsh-Kaczmarz system with respect to the Marcinkiewicz means. (English) Zbl 1214.42056 Proceedings of the fifth international conference on functional analysis and approximation theory, Acquafredda di Maratea (Potenza), Italy, June 16–23, 2004. Palermo: Circolo Matemàtico di Palermo. Supplemento ai Rendiconti del Circolo Matemàtico di Palermo. Serie II 76, 503-516 (2005). MSC: 42C10 42C20 PDFBibTeX XMLCite \textit{K. Nagy}, Suppl. Rend. Circ. Mat. Palermo (2) 76, 503--516 (2005; Zbl 1214.42056)
Nagy, Károly Convergence in norm of the Fejér means on \(\mathbb R^+\) with respect to Walsh-Kaczmarz system. (English) Zbl 1062.42020 Acta Math. Acad. Paedagog. Nyházi. (N.S.) 20, 169-175 (2004). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Acta Math. Acad. Paedagog. Nyházi. (N.S.) 20, 169--175 (2004; Zbl 1062.42020) Full Text: EuDML EMIS
Gát, G.; Nagy, K. Cesàro summability of the character system of the \(p\)-series field in the Kaczmarz rearrangement. (English) Zbl 1012.42021 Anal. Math. 28, No. 1, 1-23 (2002). MSC: 42C10 40G05 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Anal. Math. 28, No. 1, 1--23 (2002; Zbl 1012.42021) Full Text: DOI
Gát, G.; Nagy, K. On the Sunouchi operator with respect to the Walsh-Kaczmarz system. (English) Zbl 0973.42022 Acta Math. Hung. 89, No. 1-2, 93-101 (2000). Reviewer: W.R.Wade (Tennessee) MSC: 42C10 42C20 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Acta Math. Hung. 89, No. 1--2, 93--101 (2000; Zbl 0973.42022) Full Text: DOI
Nagy, K. On the direct kernels with respect to the Walsh-Kaczmarz system. (English) Zbl 0980.42020 Acta Math. Acad. Paedagog. Nyházi. (N.S.) 16, 9-13 (2000). MSC: 42C10 PDFBibTeX XMLCite \textit{K. Nagy}, Acta Math. Acad. Paedagog. Nyházi. (N.S.) 16, 9--13 (2000; Zbl 0980.42020) Full Text: EuDML
Gát, G.; Nagy, K. The fundamental theorem of two-parameter pointwise derivative on Vilenkin groups. (English) Zbl 0932.42020 Anal. Math. 25, No. 1, 33-55 (1999). Reviewer: Ferenc Weisz (Budapest) MSC: 42C10 43A75 PDFBibTeX XMLCite \textit{G. Gát} and \textit{K. Nagy}, Anal. Math. 25, No. 1, 33--55 (1999; Zbl 0932.42020) Full Text: DOI
Nagy, Károly A Hardy-Littlewood-like inequality on two-dimensional compact totally disconnected spaces. (English) Zbl 0908.42014 Acta Math. Acad. Paedagog. Nyházi. (N.S.) 14, 31-35 (1998). Reviewer: László Székelyhidi (Debrecen) MSC: 42C10 26D15 PDFBibTeX XMLCite \textit{K. Nagy}, Acta Math. Acad. Paedagog. Nyházi. (N.S.) 14, 31--35 (1998; Zbl 0908.42014) Full Text: EMIS
Nagy, K. On the \((H,L)\) typeness of the maximal operator of the derivate on two-dimensional Vilenkin groups. (English) Zbl 0891.42016 Stancu, Dimitrie D. (ed.) et al., Approximation and optimization. Proceedings of ICAOR: International conference, Cluj-Napoca, Romania, July 29–August 1, 1996. Volume II. Cluj-Napoca: Transilvania Press, 179-186 (1997). Reviewer: W.R.Wade (Knoxville) MSC: 42C10 42B25 42B30 PDFBibTeX XMLCite \textit{K. Nagy}, in: Approximation and optimization. Proceedings of ICAOR: International conference, Cluj-Napoca, Romania, July 29--August 1, 1996. Volume II. Cluj-Napoca: Transilvania Press. 179--186 (1997; Zbl 0891.42016)
Nagy, K. Norm convergence of Fejér means of certain functions with respect to UDMD product systems. (English) Zbl 0882.42015 Acta Acad. Paedagog. Agriensis, Sect. Mat. (N.S.) 22, 119-126 (1994). Reviewer: György Gát (Nyiregyháza) MSC: 42C10 26A16 43A75 40G05 PDFBibTeX XMLCite \textit{K. Nagy}, Acta Acad. Paedagog. Agriensis, Sect. Mat. (N.S.) 22, 119--126 (1994; Zbl 0882.42015)