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The development of general differential and general differential-boundary systems. (English) Zbl 0322.34009


MSC:

34B05 Linear boundary value problems for ordinary differential equations
34L99 Ordinary differential operators
34-02 Research exposition (monographs, survey articles) pertaining to ordinary differential equations
47-02 Research exposition (monographs, survey articles) pertaining to operator theory
47A05 General (adjoints, conjugates, products, inverses, domains, ranges, etc.)
47A45 Canonical models for contractions and nonselfadjoint linear operators
47B25 Linear symmetric and selfadjoint operators (unbounded)
41A15 Spline approximation
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