Bogoşel, Beniamin; Costache, Tania-Luminiţa; Lupu, Cezar Problems and solutions from SEEMOUS 2011 competition. (Romanian. English summary) Zbl 1325.97022 Gaz. Mat., Ser. A 29(108), No. 1-2, 36-48 (2011). MSC: 97U40 PDFBibTeX XMLCite \textit{B. Bogoşel} et al., Gaz. Mat., Ser. A 29(108), No. 1--2, 36--48 (2011; Zbl 1325.97022)
Lupu, Cezar Matrix adjugates and additive commutators. (English) Zbl 1325.15013 Gaz. Mat., Ser. A 29(108), No. 3-4, 90-96 (2011). MSC: 15A24 15A27 15A60 PDFBibTeX XMLCite \textit{C. Lupu}, Gaz. Mat., Ser. A 29(108), No. 3--4, 90--96 (2011; Zbl 1325.15013)
Lupu, Cezar; Mateescu, Constantin; Matei, Vlad; Opincariu, Mihai A refinement of the Finsler-Hadwiger reverse inequality. (English) Zbl 1325.51018 Gaz. Mat., Ser. A 28(107), No. 1-2, 49-53 (2010). MSC: 51M16 51M04 PDFBibTeX XMLCite \textit{C. Lupu} et al., Gaz. Mat., Ser. A 28(107), No. 1--2, 49--53 (2010; Zbl 1325.51018)
Lupu, Cezar Another trace inequality for unitary matrices. (English) Zbl 1325.15016 Gaz. Mat., Ser. A 28(107), No. 3-4, 137-141 (2010). MSC: 15A42 15A45 PDFBibTeX XMLCite \textit{C. Lupu}, Gaz. Mat., Ser. A 28(107), No. 3--4, 137--141 (2010; Zbl 1325.15016)
Lupu, Cezar; Nicula, Virgil Improved Finsler-Hadwiger inequality revisited. (English) Zbl 1325.51019 Gaz. Mat., Ser. A 28(107), No. 3-4, 130-133 (2010). MSC: 51M16 51M04 PDFBibTeX XMLCite \textit{C. Lupu} and \textit{V. Nicula}, Gaz. Mat., Ser. A 28(107), No. 3--4, 130--133 (2010; Zbl 1325.51019)
Gologan, Radu; Lupu, Cezar An Olympiad problem: zeroes of functions in the image of a Volterra operator. (English) Zbl 1326.26014 Gaz. Mat., Ser. A 27(106), No. 3, 209-213 (2009). MSC: 26A24 26C10 PDFBibTeX XMLCite \textit{R. Gologan} and \textit{C. Lupu}, Gaz. Mat., Ser. A 27(106), No. 3, 209--213 (2009; Zbl 1326.26014)