
Izv. Vyssh. Uchebn. Zaved. Mat., 2017, Number 1, Pages 26–43
(Mi ivm9194)




This article is cited in 2 scientific papers (total in 2 papers)
Homogeneous differentialoperator equations in locally convex spaces
S. N. Mishin^{} ^{} Orel State University,
95 Komsomol'skaya str., Oryol, 302026 Russia
Abstract:
We describe a general method that allows to find solutions to homogeneous differentialoperator equations with variable coefficients by means of continuous vectorvalued functions. The “homogeneity” is interpreted not in terms of null righthand side of an equation but in terms that the lefthand side is homogeneous function of operators appearing in an equation. Solutions are presented by a uniformly convergent functional vectorvalued series, generated by a set of solutions to some ordinary differential equation of $k$th degree, roots of characteristical polynomial, and some set of elements of locally convex space. We find sufficient conditions of continuous dependence of solution on generating set, and a solution to Cauchy's problem for considered equations. We specify conditions of its existence and uniqueness. Besides, under certain conditions we find a general solution to considered equation (a function of most general form from which any particular solution can be found). The investigation is realized by means of characteristics (order and type) of operator and operator characteristics (operator order and operator type) of vector relative to an operator. Also we use a convergence of operator series relative to equicontinuous bornology.
Keywords:
locally convex space, order and type of operators, differentialoperator equation, equicontinuous bornology, convergence by bornology, vectorvalued function.
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Russian Mathematics (Izvestiya VUZ. Matematika), 2017, 61:1, 22–38
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UDC:
517.983 Received: 03.07.2015
Citation:
S. N. Mishin, “Homogeneous differentialoperator equations in locally convex spaces”, Izv. Vyssh. Uchebn. Zaved. Mat., 2017, no. 1, 26–43; Russian Math. (Iz. VUZ), 61:1 (2017), 22–38
Citation in format AMSBIB
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This publication is cited in the following articles:

S. N. Mishin, “Generalization of the Lagrange Method to the Case of SecondOrder Linear Differential Equations with Constant Operator Coefficients in Locally Convex Spaces”, Math. Notes, 103:1 (2018), 75–88

S. N. Mishin, “Ob odnom klasse operatornykh uravnenii v lokalno vypuklykh prostranstvakh”, Izv. vuzov. Matem., 2018, no. 11, 33–50

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