A disconjugacy condition for 𝑦”’+𝑎₂𝑦”+𝑎₁𝑦’+𝑎₀𝑦=0

A disconjugacy condition for $y”’ +a_2 y” + a_1 y’ +a_0 y = 0$
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by Ronald M. Mathsen PDF

Proc. Amer. Math. Soc. 17 (1966), 627-632 Request permission

References

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Leonard Fountain and Lloyd Jackson, A generalized solution of the boundary value problem for $y^{\prime \prime }=f(x,\,y,\,y^{\prime } )$, Pacific J. Math. 12 (1962), 1251–1272. MR 163002, DOI 10.2140/pjm.1962.12.1251
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Sur l’équation différentielle linéaire du second ordre

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