Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4630388 | Applied Mathematics and Computation | 2011 | 8 Pages |
Abstract
For the delay differential equationxâ²(t)+p(t)x(h(t))=0,p(t)⩾0,h(t)⩽t,t⩾0,limtââh(t)=â,we demonstrate that the inequality limsuptâââ«h(t)tp(u)du>1 is not sufficient for oscillation. Moreover, for any A > 0 the relation limsuptâââ«h(t)tp(u)du>A, generally, does not imply oscillation. A similar result is obtained for difference equations. In terms of the maximal argument, new sufficient oscillation conditions are presented for differential and difference equations.
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
Elena Braverman, BaÅak Karpuz,