A numerical determination of subharmonic response for the Duffing equation $\ddot x+\alpha x+\beta x^3=f\operatorname {cos}\omega t\ (\alpha >0)^*$
Author:
Morris E. Levenson
Journal:
Quart. Appl. Math. 25 (1967), 11-17
DOI:
https://doi.org/10.1090/qam/99909
MathSciNet review:
QAM99909
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Article copyright:
© Copyright 1967
American Mathematical Society