Gogyan, S.; Srapionyan, N. On the quasi-greedy constant of the Haar subsystems in \(L^1(0, 1)\). (English. Russian original) Zbl 1430.41026 J. Contemp. Math. Anal., Armen. Acad. Sci. 54, No. 2, 124-128 (2019); translation from Izv. Nats. Akad. Nauk Armen., Mat. 54, No. 2, 37-42 (2019). MSC: 41A65 46B20 PDFBibTeX XMLCite \textit{S. Gogyan} and \textit{N. Srapionyan}, J. Contemp. Math. Anal., Armen. Acad. Sci. 54, No. 2, 124--128 (2019; Zbl 1430.41026); translation from Izv. Nats. Akad. Nauk Armen., Mat. 54, No. 2, 37--42 (2019) Full Text: DOI
Gogyan, S. L. Democratic subsystems of the multiple Haar system. (English. Russian original) Zbl 1334.41045 J. Contemp. Math. Anal., Armen. Acad. Sci. 50, No. 6, 296-299 (2015); translation from Izv. Nats. Akad. Nauk Armen., Mat. 50, No. 6, 26-32 (2015). MSC: 41A65 46B20 PDFBibTeX XMLCite \textit{S. L. Gogyan}, J. Contemp. Math. Anal., Armen. Acad. Sci. 50, No. 6, 296--299 (2015; Zbl 1334.41045); translation from Izv. Nats. Akad. Nauk Armen., Mat. 50, No. 6, 26--32 (2015) Full Text: DOI
Gogyan, S. L. On greedy algorithm in \(L^{1}(0, 1)\) by regular Haar system. (English. Russian original) Zbl 1302.42043 J. Contemp. Math. Anal., Armen. Acad. Sci. 46, No. 1, 21-31 (2011); translation from Izv. Nats. Akad. Nauk Armen., Mat. 46, No. 1, 3-16 (2011). MSC: 42C10 42C20 PDFBibTeX XMLCite \textit{S. L. Gogyan}, J. Contemp. Math. Anal., Armen. Acad. Sci. 46, No. 1, 21--31 (2011; Zbl 1302.42043); translation from Izv. Nats. Akad. Nauk Armen., Mat. 46, No. 1, 3--16 (2011) Full Text: DOI
Grigoryan, M. G.; Gogyan, S. L. On rearranged series by Haar system. (English. Russian original) Zbl 1231.42026 J. Contemp. Math. Anal., Armen. Acad. Sci. 42, No. 2, 92-108 (2007); translation from Izv. Nats. Akad. Nauk Armen., Mat. 42, No. 2, 44-64 (2007). MSC: 42C10 42C20 PDFBibTeX XMLCite \textit{M. G. Grigoryan} and \textit{S. L. Gogyan}, J. Contemp. Math. Anal., Armen. Acad. Sci. 42, No. 2, 92--108 (2007; Zbl 1231.42026); translation from Izv. Nats. Akad. Nauk Armen., Mat. 42, No. 2, 44--64 (2007) Full Text: DOI