Din, Q.; Donchev, T.; Nosheen, A.; Rafaqat, M. Runge-Kutta methods for differential equations with variable time of impulses. (English) Zbl 1329.65152 Numer. Funct. Anal. Optim. 36, No. 6, 777-791 (2015). MSC: 65L06 34A37 PDFBibTeX XMLCite \textit{Q. Din} et al., Numer. Funct. Anal. Optim. 36, No. 6, 777--791 (2015; Zbl 1329.65152) Full Text: DOI
Din, Qamar; Donchev, Tzanko; Kolev, Dimitar Numerical approximations of impulsive delay differential equations. (English) Zbl 1278.34086 Numer. Funct. Anal. Optim. 34, No. 7, 728-740 (2013). MSC: 34K28 34K45 PDFBibTeX XMLCite \textit{Q. Din} et al., Numer. Funct. Anal. Optim. 34, No. 7, 728--740 (2013; Zbl 1278.34086) Full Text: DOI
Baier, Robert; Donchev, Tzanko Discrete approximation of impulsive differential inclusions. (English) Zbl 1205.34012 Numer. Funct. Anal. Optim. 31, No. 6, 653-678 (2010). Reviewer: Andrej V. Plotnikov (Odessa) MSC: 34A60 34A37 93B03 PDFBibTeX XMLCite \textit{R. Baier} and \textit{T. Donchev}, Numer. Funct. Anal. Optim. 31, No. 6, 653--678 (2010; Zbl 1205.34012) Full Text: DOI Link
Donchev, Tzanko Approximation of lower semicontinuous differential inclusions. (English) Zbl 0987.65065 Numer. Funct. Anal. Optimization 22, No. 1-2, 55-67 (2001). Reviewer: Daniel C.Biles (Bowling Green) MSC: 65L05 34A60 34G25 65L12 PDFBibTeX XMLCite \textit{T. Donchev}, Numer. Funct. Anal. Optim. 22, No. 1--2, 55--67 (2001; Zbl 0987.65065) Full Text: DOI
Donchev, Tzanko D.; Farkhi, Elza M. Moduli of smoothness of vector valued functions of a real variable and applications. (English) Zbl 0699.65039 Numer. Funct. Anal. Optimization 11, No. 5-6, 497-509 (1990). Reviewer: T.D.Donchev MSC: 65J05 41A65 65G30 65D15 PDFBibTeX XMLCite \textit{T. D. Donchev} and \textit{E. M. Farkhi}, Numer. Funct. Anal. Optim. 11, No. 5--6, 497--509 (1990; Zbl 0699.65039) Full Text: DOI