A note on comparison theorems

Shoshana Abramovich
1977 Proceedings of the American Mathematical Society  
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