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A note on comparison theorems
1977
Proceedings of the American Mathematical Society
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Comparison theorems for solutions, for focal points and conjugate points of second order linear differential equations are given in this paper. SHOSHANA ABRAMOVICH Since w = y'u -u'y = i (p -q)uy dt = I (q -p)uy dt J -a Jx it follows that w < 0 in the intervals [ -a, 0] and [d, a]. Now, if 0 < x < d, then,
doi:10.1090/s0002-9939-1977-0460783-9
fatcat:okvtwvdcrfdh7p445v5k3cngxe