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NONSELFADJOINT EQUATIONS ll
PARTIAL DIFFERENTIAL EQUATIONS
6 other sections not shown
abstract analogous applying Banach space Barrett boundary conditions Chapter coefficients comparison theorems conjoined solution conjugate points consider Corollary corresponding defined denote differential inequalities disconjugate Edited eigenfunction elliptic equations elliptic operator equation 7.2 exists formulate Green's function Green's theorem Hamiltonian system initial conditions integral interval Kreith Lemma Let u(x maximum principles nodal domain nonnegative definite nonselfadjoint equations nonsingular nontrivial solution u(x nxn matrix obtain ordinary differential equations oscillation properties oscillation theory oscillatory behavior physical interpretation Picone identity l.4 Pl(x Pn(x positive operator Pq(x Priifer proof of Theorem Prufer transformation respectively Riccati equation satisfies scalar selfadjoint singularities solution of 7.3 Sturm-Picone theorem Sturmian comparison theorems Swanson symmetric matrix techniques Theorem l.3 tion trigonometric functions u-regular valid value problems variational vector yields the following zero in a,p zeros of u(x