## Abstract Necessary and sufficient conditions for a fourth order functional differential equation of the form (1) [r(t)yβ³(t)]β³+f(t,y(h~1~(t)), y(h~2~(t)), β¦, y(h~n~(t)))=0 to be oscillatory are given when f is strongly superlinear or strongly sublinear.
A necessary condition for a power series to be a formal solution of a singular linear differential equation of order k
β Scribed by H Gingold
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 275 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0022-247X
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