Extends criteria for comparison theorems in third-order differential equations, indicating broader applicability to noncanonical forms.
The aim of this paper is to provide a general method for extending the criteria known for a simple canonical equation x′′′(t)+q(t)x(σ(t))=0 to a noncanonical equation of the form r2(t)r1(t)y′(t)′′+p(t)y(τ(t))=0.
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Blanka Baculíková (2026) studied this question.
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