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Zbl 0969.34060
Dai, Lixin; Tian, Chuanjun
Oscillation criteria for advanced type differential equations. (English)
[J] J. Ocean Univ. Qingdao 30, No.2, 364-368 (2000). ISSN 1001-1862

Summary: This paper, using the method of {\it B. G. Zhang} [Funkc. Ekvacioj. Ser. Int. 28, 93-101 (1985; Zbl 0578.34046)], is concerned with first-order functional-differential equations $$x'(t)=p(t)x(\tau(t)),\quad t\geq 0, \tau(t)>t.$$ Some new oscillation criteria are established and corresponding results by {\it Ch. Tian} and {\it B. G. Zhang} [Bull. Lond. Math. Soc. 31, No.~2, 196-206 (1999; Zbl 0933.34076)] are improved.

MSC 2000:: *34K11 Oscillation theory of functional-differential equations

Keywords: first-order functional-differential equations; oscillation

Citations: Zbl 0578.34046; Zbl 0933.34076

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