On solvability of focal boundary value problems for higher order functional differential equations with integral restrictions
نویسندگان
چکیده
Sharp conditions are obtained for the unique solvability of focal boundary value problems higher-order functional differential equations under integral restrictions on operators. In terms norm operator, unimprovable problem established in explicit form. If these not fulfilled, then there exists a positive bounded operator with given such that this is uniquely solvable. symmetric case, some estimates best constants given. Comparison existing results also performed.
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ژورنال
عنوان ژورنال: Electronic Journal of Qualitative Theory of Differential Equations
سال: 2021
ISSN: ['1417-3875']
DOI: https://doi.org/10.14232/ejqtde.2021.1.22