Bellman, Richard On positive definite matrices and Stieltjes integrals. (English) Zbl 0083.28002 Rend. Circ. Mat. Palermo, II. Ser. 6, 254-258 (1958). PDFBibTeX XMLCite \textit{R. Bellman}, Rend. Circ. Mat. Palermo (2) 6, 254--258 (1958; Zbl 0083.28002) Full Text: DOI
Bellman, Richard A generalization of some integral identities due to Ingham and Siegel. (English) Zbl 0073.27803 Duke Math. J. 23, 571-577 (1956). PDFBibTeX XMLCite \textit{R. Bellman}, Duke Math. J. 23, 571--577 (1956; Zbl 0073.27803) Full Text: DOI
Bellman, Richard On explicit solutions of some trinomial equations in terms of the maximum operation. (English) Zbl 0072.05304 Math. Mag. 30, 41-44 (1956). PDFBibTeX XMLCite \textit{R. Bellman}, Math. Mag. 30, 41--44 (1956; Zbl 0072.05304) Full Text: DOI