Nonoscillatory solutions of higher order delay equations

  title={Nonoscillatory solutions of higher order delay equations},
  author={Kennith Earl Foster and Ronald Grimmer},
where f is a continuous real valued function for f > 0 and x E R such that f(t, x) is nondecreasing in x for fixed t, and xf(t, x) > 0 if x # 0. The delay function g(t) is continuous and satisfies g(t) to in that it satisfies for r>, t, x(t)x”‘(t) > 0 for i = 0, l,..., I, and (-1)“’ ‘x(t)x”‘(t) < 0, i = 1 + 1, I + 2 ,..., n. 

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