On the spectrum of second-order differential operators with complex coefficients
نویسندگان
چکیده
منابع مشابه
On the spectrum of second order differential operators with complex coefficients
singular. Under the assumption that Imq(x) ≤ 0 for all x ∈ [a, b), Sims proved that for λ ∈ C+, there exists at least one solution of (1. 1) which lies in the weighted space L(a, b; Im[λ− q]dx); such a solution lies in L(a, b). There are now three distinct possibilities for λ ∈ C+: (I) there is, up to constant multiples, precisely one solution of (1. 1) in L(a, b; Im[λ−q]dx) and L(a, b), (II) o...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
سال: 1999
ISSN: 1364-5021,1471-2946
DOI: 10.1098/rspa.1999.0357