%0 Generic %A Sugie Jitsuro %D 2020 %F acta:69522 %K Differenciálegyenlet %N 18 %T A remark on Philos-type oscillation criteria for differential equations %U http://acta.bibl.u-szeged.hu/69522/ %X The purpose of this short note is to call attention to expressions of Philostype criteria for the oscillation of solutions of a simple differential equation. A perfect square expression is used to obtain an evaluation that plays an essential role in the proof of Philos-type oscillation theorems. The required condition is pointed out when using the perfect square expression. To simplify the discussion, here we deal with two second-order linear differential equations, but its content is also applied to a variety of equations. %Z Bibliogr.: 7. p. ; összefoglalás angol nyelven