Duca, Dorel I. On theorems of the alternative for complex linear equations and inequalities. (English) Zbl 0725.15017 Prep., “Babeș-Bolyai” Univ., Fac. Math. Phys., Res. Semin. 8, 35-48 (1989). Reviewer: J.Parida (Rourkela) MSC: 15A39 90C05 52A40 PDFBibTeX XMLCite \textit{D. I. Duca}, Prepr., ``Babeș-Bolyai'' Univ., Fac. Math. Phys., Res. Semin. 1989, No. 8, 35--48 (1989; Zbl 0725.15017)
Duca, Dorel I. On theorems of the alternative for nonhomogeneous complex linear equations and inequalities. (English) Zbl 0688.90060 Prepr., ”Babeș-Bolyai” Univ., Fac. Math. Phys., Res. Semin. 8, 29-40 (1987). Reviewer: B.Mond MSC: 90C99 15A39 PDFBibTeX XMLCite \textit{D. I. Duca}, Prepr., ``Babeș-Bolyai'' Univ., Fac. Math. Phys., Res. Semin. 1987, No. 8, 29--40 (1987; Zbl 0688.90060)
Duca, Dorel I. On the Farkas type theorem for complex linear equations and inequalities. (English) Zbl 0653.15001 Prepr., “Babeș-Bolyai” Univ., Fac. Math. Phys., Res. Semin. 1987, No. 6, 143-148 (1987). Reviewer: Tong Wenting MSC: 15A06 15A45 PDFBibTeX XMLCite \textit{D. I. Duca}, Prepr., ``Babeș-Bolyai'' Univ., Fac. Math. Phys., Res. Semin. 1987, No. 6, 143--148 (1987; Zbl 0653.15001)