Lewy, H. On the definiteness of quadratic forms which obey conditions of symmetry. (English) Zbl 0138.01104 Ann. Sc. Norm. Super. Pisa, Sci. Fis. Mat., III. Ser. 19, 577-591 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:linear algebra, polynomials, forms PDFBibTeX XMLCite \textit{H. Lewy}, Ann. Sc. Norm. Super. Pisa, Sci. Fis. Mat., III. Ser. 19, 577--591 (1965; Zbl 0138.01104) Full Text: Numdam EuDML