Krnić, I.; Potapov, M. M. On conditions for the solvability of quadratic minimization problems with quadratic and linear constraints. (Russian) Zbl 1274.90252 Math. Montisnigri 15, 33-44 (2002). MSC: 90C20 PDFBibTeX XMLCite \textit{I. Krnić} and \textit{M. M. Potapov}, Math. Montisnigri 15, 33--44 (2002; Zbl 1274.90252)
Krnić, I.; Potapov, M. M. Correctness conditions for the problem of minimizing a quadratic functional on an ellipsoid and a halfspace. (Russian. English summary) Zbl 0853.90121 Math. Montisnigri 4, 27-41 (1995). MSC: 90C48 90C20 PDFBibTeX XMLCite \textit{I. Krnić} and \textit{M. M. Potapov}, Math. Montisnigri 4, 27--41 (1995; Zbl 0853.90121)