
doi: 10.1137/0507072
Necessary and sufficient conditions for pointwise completeness of delay-differential systems of neutral type are given. It is shown that there exist second order delay-differential systems of neutral type which are not pointwise complete. It is also proved that degeneracy in case of nth order delay-differential systems of neutral type with one delay can start no later than $(n - 1)h$, where h is the delay.
General theory of functional-differential equations
General theory of functional-differential equations
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