In this paper we give several new methods to study the existence and uniqueness of harmonic solutions and subharmonic ones of the SD(Smooth and Discontinuous)differential equations+x(1-1/(a+x))=e(t),where e(...
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In this paper we give several new methods to study the existence and uniqueness of harmonic solutions and subharmonic ones of the SD(Smooth and Discontinuous)differential equations+x(1-1/(a+x))=e(t),where e(t)∈C(R,R)and e(t+2π)=e(t).
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