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HILSCHER, Roman a Vera ZEIDAN. Coupled intervals for discrete symplectic systems. Linear Algebra and its Applications. USA: Elsevier Science, 2006, roč. 419, 2-3, s. 750-764. ISSN 0024-3795.Podrobněji: https://is.muni.cz/publication/697292/cs
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Nonnegativity and positivity of quadratic functionals in the discrete calculus of variations: SurveyHILSCHER, Roman a Vera ZEIDAN. Nonnegativity and positivity of quadratic functionals in the discrete calculus of variations: Survey. Journal of Difference Equations and Applications. Taylor and Francis, 2005, roč. 11, č. 9, s. 857-875. ISSN 1023-6198.Podrobněji: https://is.muni.cz/publication/575741/cs
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HILSCHER, Roman a Vera ZEIDAN. Coupled intervals in the discrete optimal control. Journal of Difference Equations and Applications. Taylor and Francis, 2004, roč. 10, č. 2, s. 151-186. ISSN 1023-6198.Podrobněji: https://is.muni.cz/publication/490556/cs
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HILSCHER, Roman a Vera ZEIDAN. Equivalent conditions to the nonnegativity of a quadratic functional in discrete optimal control. Mathematische Nachrichten. Berlin: WILEY-VCH Verlag, 2004, roč. 266, č. 1, s. 48-59. ISSN 0025-584X.Podrobněji: https://is.muni.cz/publication/492729/cs
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HILSCHER, Roman a Vera ZEIDAN. Nonnegativity of a discrete quadratic functional in terms of the (strengthened) Legendre and Jacobi conditions. Computers & mathematics with applications. New York: Pergamon Press, 2003, roč. 45, 6-9, s. 1369-1383. ISSN 0097-4943.Podrobněji: https://is.muni.cz/publication/488392/cs
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HILSCHER, Roman a Vera ZEIDAN. Symplectic difference systems: variable stepsize discretization and discrete quadratic functionals. Linear Algebra and its Applications. USA: Elsevier Science, 2003, roč. 367, č. 1, s. 67-104. ISSN 0024-3795.Podrobněji: https://is.muni.cz/publication/488397/cs
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HILSCHER, Roman a Vera ZEIDAN. Coupled intervals in the discrete calculus of variations: necessity and sufficiency. Journal of Mathematical Analysis and Applications. USA: Acad.Press, 2002, roč. 276, č. 1, s. 396-421. ISSN 0022-247X.Podrobněji: https://is.muni.cz/publication/488395/cs
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HILSCHER, Roman a Vera ZEIDAN. Discrete optimal control: second order optimality conditions. Journal of Difference Equations and Applications. Taylor and Francis, 2002, roč. 8, č. 10, s. 875-896. ISSN 1023-6198.Podrobněji: https://is.muni.cz/publication/488396/cs
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HILSCHER, Roman a Vera ZEIDAN. Second order sufficiency criteria for a discrete optimal control problem. Journal of Difference Equations and Applications. Taylor and Francis, 2002, roč. 8, č. 6, s. 573-602. ISSN 1023-6198.Podrobněji: https://is.muni.cz/publication/488389/cs
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HILSCHER, Roman a Vera ZEIDAN. Discrete optimal control: the accessory problem and necessary optimality conditions. Journal of Mathematical Analysis and Applications. San Diego (USA): Academic Press, 2000, roč. 243, č. 2, s. 429-452. ISSN 0022-247X.Podrobněji: https://is.muni.cz/publication/488378/cs