Some elliptic balls which avoid a Nyquist set in ℂn+1
1978 ◽
Vol 79
(3-4)
◽
pp. 327-334
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Keyword(s):
SynopsisConditions are obtained for certain elliptic balls in ℂn+1 to have empty intersection with the Nyquist set of a vector polynomial G(z). Such conditions are shown to yield explicit criteria for the existence of periodic solutions of non-autonomous scalar differential equations of the form A* G(D)y = p.
2017 ◽
Vol 8
(1)
◽
pp. 482-496
◽
1991 ◽
Vol 7
(1)
◽
pp. 74-79
1974 ◽
Vol 15
(2)
◽
pp. 350-378
◽