Travis, C. C.; Young, E. C. Comparison theorems for ultrahyperbolic equations. (English) Zbl 0384.35005 Int. J. Math. Math. Sci. 1, 31-40 (1978). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents MSC: 35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs 35L20 Initial-boundary value problems for second-order hyperbolic equations PDFBibTeX XMLCite \textit{C. C. Travis} and \textit{E. C. Young}, Int. J. Math. Math. Sci. 1, 31--40 (1978; Zbl 0384.35005) Full Text: DOI EuDML EMIS