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Problems with one quarter

Ján Ohriska (2005)

Czechoslovak Mathematical Journal

In this paper two sequences of oscillation criteria for the self-adjoint second order differential equation ( r ( t ) u ' ( t ) ) ' + p ( t ) u ( t ) = 0 are derived. One of them deals with the case d t r ( t ) = , and the other with the case d t r ( t ) < .

Propagation of delayed lattice differential equations without local quasimonotonicity

Shuxia Pan (2015)

Annales Polonici Mathematici

This paper is concerned with the traveling wave solutions and asymptotic spreading of delayed lattice differential equations without quasimonotonicity. The spreading speed is obtained by constructing auxiliary equations and using the theory of lattice differential equations without time delay. The minimal wave speed of invasion traveling wave solutions is established by investigating the existence and nonexistence of traveling wave solutions.

Currently displaying 521 – 540 of 579