Vârsan, Constantin On the optimal weak feedback controls involving deterministic gradient control systems. (English) Zbl 1119.93041 Stud. Cercet. Mat. 8(58), No. 3, 335-342 (2006). Reviewer: Gheorghe Aniculăesei (Iaşi) MSC: 93C15 PDF BibTeX XML Cite \textit{C. Vârsan}, Math. Rep., Buchar. 8(58), No. 3, 335--342 (2006; Zbl 1119.93041)
Vârsan, C. Smooth solutions for first order differential systems with Lipschitz continuous coefficients. (English) Zbl 0994.35037 Rev. Roum. Math. Pures Appl. 45, No. 5, 913-924 (2000). MSC: 35F20 17B66 35R25 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 45, No. 5, 913--924 (2000; Zbl 0994.35037)
Vârsan, Constantin Applications of Lie algebras to hyperbolic and stochastic differential equations. (English) Zbl 0948.35002 Mathematics and Its Applications 466. Dordrecht: Kluwer Academic Publishers (ISBN 0-7923-5718-3/hbk). x, 238 p. (1999). Reviewer: Ya.Belopolskaya (St.Peterburg) MSC: 35-02 60H15 17B66 35R60 35A30 35L60 PDF BibTeX XML Cite \textit{C. Vârsan}, Applications of Lie algebras to hyperbolic and stochastic differential equations. Dordrecht: Kluwer Academic Publishers (1999; Zbl 0948.35002)
Vârsan, C. Lie algebra in differential equations. (English) Zbl 0912.34039 Seminar Series in Mathematics: Analysis. 2. Constantza: Ovidius University Constantza, 78 p. (1997). Reviewer: N.Medvedeva (Chelyabinsk) MSC: 34C45 17B10 34A34 35L99 PDF BibTeX XML Cite \textit{C. Vârsan}, Lie algebra in differential equations. Constantza: Ovidius University Constantza (1997; Zbl 0912.34039)
Vârsan, C. Finitely generated over orbits Lie algebras applied to affine control systems. (English) Zbl 1012.93502 Rev. Roum. Math. Pures Appl. 39, No. 4, 375-384 (1994). MSC: 93B27 17B99 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 39, No. 4, 375--384 (1994; Zbl 1012.93502)
Vârsan, C. On decompositions and integral representation of solutions for affine control systems. (English) Zbl 0809.93023 Syst. Control Lett. 22, No. 1, 53-59 (1994). Reviewer: A.Perdon (Ancona) MSC: 93C15 93C10 PDF BibTeX XML Cite \textit{C. Vârsan}, Syst. Control Lett. 22, No. 1, 53--59 (1994; Zbl 0809.93023) Full Text: DOI
Vârsan, C. Approximation of Goursat problem for hyperbolic controlled stochastic differential equations. (English) Zbl 0770.60063 Rev. Roum. Math. Pures Appl. 37, No. 9, 813-832 (1992). Reviewer: C.Vârsan (Bucureşti) MSC: 60H20 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 37, No. 9, 813--832 (1992; Zbl 0770.60063)
Vârsan, C. Bounded solutions for controlled hyperbolic systems. (English) Zbl 0814.35070 Optimization, optimal control and partial differential equations. Proc. 1st Fr.-Rom. Conf., Iasi/Rom. 1992, ISNM 107, 123-131 (1992). MSC: 35L45 35B10 PDF BibTeX XML Cite \textit{C. Vârsan}, in: Optimization, optimal control and partial differential equations. Proceedings of the first Franco-Romanian conference, held in Iasi, Romania, September 7-11, 1992. Basel: Birkhäuser Verlag. 123--131 (1992; Zbl 0814.35070)
Varsan, C. Approximation for a Goursat problem of hyperbolic controlled stochastic differential equations. (English) Zbl 0824.93054 Barbu, V. (ed.), Differential equations and control theory. Proceedings of an international conference on differential equations and control theory, held in Iasi, Romania, August 27-September 1, 1990. Harlow: Longman Scientific & Technical. Pitman Res. Notes Math. Ser. 250, 347-353 (1991). Reviewer: A.Akutowicz (Berlin) MSC: 93E03 60H10 93C10 PDF BibTeX XML Cite \textit{C. Varsan}, in: Differential equations and control theory. Proceedings of an international conference on differential equations and control theory, held in Iasi, Romania, August 27-September 1, 1990. Harlow: Longman Scientific \&| Technical; New York: Wiley. 347--353 (1991; Zbl 0824.93054)
Vârsan, C. Stochastic differential equations and asymptotic almost periodic solutions. (English) Zbl 0715.60069 Rev. Roum. Math. Pures Appl. 35, No. 5, 485-493 (1990). Reviewer: C.Vârsan MSC: 60H10 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 35, No. 5, 485--493 (1990; Zbl 0715.60069)
Vârsan, C. Approximation and existence of periodic solutions for controlled diffusion equations. (English) Zbl 0703.60052 Stochastics Stochastics Rep. 30, No. 3-4, 133-150 (1990). Reviewer: Tran Van Nhung MSC: 60H10 34F05 PDF BibTeX XML Cite \textit{C. Vârsan}, Stochastics Stochastics Rep. 30, No. 3--4, 133--150 (1990; Zbl 0703.60052) Full Text: DOI
Vârsan, Constantin Asymptotic almost periodic solutions for stochastic differential equations. (English) Zbl 0693.60050 Stochastic systems and optimization, Proc. 6th IFIP WG 7.1 Work. Conf., Warsaw/Pol. 1988, Lect. Notes Control Inf. Sci. 136, 152-158 (1989). Reviewer: D.Bobrowski MSC: 60H10 34F05 PDF BibTeX XML
Vârsan, Constantin Asymptotic almost periodic solutions for stochastic differential equations. (English) Zbl 0689.60060 Tôhoku Math. J., II. Ser. 41, No. 4, 609-618 (1989). Reviewer: C.Vârsan MSC: 60H15 PDF BibTeX XML Cite \textit{C. Vârsan}, Tohoku Math. J. (2) 41, No. 4, 609--618 (1989; Zbl 0689.60060) Full Text: DOI
Vârsan, C. On the regularity of the probabilities associated with a class of stochastic equations with delay. (English) Zbl 0654.60045 Rev. Roum. Math. Pures Appl. 33, No. 6, 529-536 (1988). Reviewer: C.Vârsan MSC: 60H20 60H07 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 33, No. 6, 529--536 (1988; Zbl 0654.60045)
Vârsan, C. On the regularity of the probabilities associated with diffusions. (English) Zbl 0639.60068 Rev. Roum. Math. Pures Appl. 32, 159-177 (1987). Reviewer: C.Vârsan MSC: 60H20 60H07 60H10 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 32, 159--177 (1987; Zbl 0639.60068)
Vârsan, C. Continuous dependence for Itô equations with respect to the drift involving Lie brackets. (English) Zbl 0639.60067 Stochastic differential systems, Proc. IFIP-WG 7/1 Work. Conf., Eisenach/GDR 1986, Lect. Notes Control Inf. Sci. 96, 232-244 (1987). Reviewer: C.Vârsan MSC: 60H20 60H10 PDF BibTeX XML
Vârsan, C. On the regularity of the transition probabilities associated with a class of degenerate diffusion processes. (English) Zbl 0621.60080 Differential equations: qualitative theory, 2nd Colloq., Szeged/Hung. 1984, Colloq. Math. Soc. János Bolyai 47, 1073-1082 (1987). MSC: 60J60 60H10 PDF BibTeX XML
Vârsan, C. Sufficient conditions for controllability of nonlinear stochastic control systems. (English) Zbl 0576.93011 Rev. Roum. Math. Pures Appl. 30, 463-472 (1985). Reviewer: J.Klamka MSC: 93B05 93C10 93E20 60H10 49K45 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 30, 463--472 (1985; Zbl 0576.93011)
Vârsan, C. Continuous dependence and time change for Ito equations. (English) Zbl 0535.60051 J. Differ. Equations 58, 295-306 (1985). MSC: 60H10 34F05 PDF BibTeX XML Cite \textit{C. Vârsan}, J. Differ. Equations 58, 295--306 (1985; Zbl 0535.60051) Full Text: DOI
Vârsan, Constantin On local controllability for nonlinear control systems. (English) Zbl 0549.93011 Rev. Roum. Math. Pures Appl. 29, 907-919 (1984). Reviewer: J.Klamka MSC: 93B05 93B03 93C10 93C99 93E20 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 29, 907--919 (1984; Zbl 0549.93011)
Vârsan, C. On maximum principle for diffusion controlled processes. (English) Zbl 0538.93074 Rev. Roum. Math. Pures Appl. 29, 277-288 (1984). Reviewer: T.Duncan MSC: 93E20 49K45 60J60 60H10 93C10 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 29, 277--288 (1984; Zbl 0538.93074)
Vârsan, C. On necessary conditions for stochastic control problems. (English) Zbl 0532.93067 Rev. Roum. Math. Pures Appl. 28, 641-663 (1983). MSC: 93E20 49K45 60H10 93C10 PDF BibTeX XML Cite \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 28, 641--663 (1983; Zbl 0532.93067)
Vârsan, C. On necessary conditions for control diffusion processes. (English) Zbl 0548.93078 Differential equations and applications, Vol. I, Proc. 2nd Conf., Rousse/Bulg. 1981, 139-142 (1982). Reviewer: J.Stojanov MSC: 93E20 60J60 49K45 PDF BibTeX XML
Varsan, C. Controllability of nonlinear stochastic control systems. (English) Zbl 0496.93014 Syst. Control Lett. 2, 243-247 (1982). MSC: 93B05 93E03 93C10 60H10 PDF BibTeX XML Cite \textit{C. Varsan}, Syst. Control Lett. 2, 243--247 (1982; Zbl 0496.93014) Full Text: DOI
Varsan, C. Almost optimal feedback law for terminal control problems. (English) Zbl 0444.93049 Rev. Roum. Math. Pures Appl. 25, 953-983 (1980). MSC: 93E20 49J55 49K45 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 25, 953--983 (1980; Zbl 0444.93049)
Varsan, C. Degenerate stochastic control systems; optimal feedback laws. (English) Zbl 0424.93050 Rev. Roum. Math. Pures Appl. 24, 1389-1410 (1979). MSC: 93E03 93D15 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 24, 1389--1410 (1979; Zbl 0424.93050)
Varsan, C. Optimal bang-bang feedback for control stochastic systems with variable structure. (English) Zbl 0427.93054 Rev. Roum. Math. Pures Appl. 23, 1429-1437 (1978). MSC: 93E20 93C20 49J30 49K30 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 23, 1429--1437 (1978; Zbl 0427.93054)
Varsan, C. Degeneracy and optimality. (English) Zbl 0426.93018 Modern trends in cybernetics and systems, Proc. 3rd int. Congr., Bucharest 1975, Vol. II, 261-263 (1977). MSC: 93B05 93C10 49J15 PDF BibTeX XML
Varsan, C. Optimal bang-bang feedback control for linear stochastic systems. (English) Zbl 0384.49022 Rev. Roum. Math. Pures Appl. 22, 1321-1335 (1977). MSC: 49K45 93E20 60J65 49K20 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 22, 1321--1335 (1977; Zbl 0384.49022)
Varsan, Constantin Local controllability along a singular trajectory. (English) Zbl 0375.93014 Rev. Roum. Math. Pures Appl. 22, 1011-1020 (1977). MSC: 93B05 93C10 93B03 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 22, 1011--1020 (1977; Zbl 0375.93014)
Varsan, C. Non-linear functional analysis and applications to optimal control theory. (English) Zbl 0356.49002 Control Theory Top. Funct. Anal., Vol. II, Lect. int. Semin. Course, Trieste 1974, 75-156 (1976). Reviewer: I. Troch MSC: 49-02 46N99 PDF BibTeX XML
Varsan, C. Pointwise higher order necessary conditions for optimal control problems. (English) Zbl 0342.49006 Rev. Roum. Math. Pures Appl. 21, 565-577 (1976). MSC: 49K15 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 21, 565--577 (1976; Zbl 0342.49006)
Varsan, C. Higher order nonlinear controllability. (English) Zbl 0342.93007 Rev. Roum. Math. Pures Appl. 20, 103-118 (1975). MSC: 93B05 93C15 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 20, 103--118 (1975; Zbl 0342.93007)
Varsan, C. Sufficient conditions of optimality of second order in Banach spaces. (English) Zbl 0342.49009 Rev. Roum. Math. Pures Appl. 20, 239-251 (1975). MSC: 49K27 46E15 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 20, 239--251 (1975; Zbl 0342.49009)
Varsan, C. Necessary conditions of second order in Banach spaces and minmax problems. (English) Zbl 0342.49008 Rev. Roum. Math. Pures Appl. 20, 363-376 (1975). MSC: 49K27 46E15 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 20, 363--376 (1975; Zbl 0342.49008)
Varsan, C. First order nonlinear controllability. (English) Zbl 0303.93018 Rev. Roum. Math. Pures Appl. 19, 1267-1273 (1974). MSC: 93B05 93C15 93C10 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 19, 1267--1273 (1974; Zbl 0303.93018)
Varsan, C. Sufficient conditions for nonlinear optimal control problems. (English) Zbl 0303.49013 Rev. Roum. Math. Pures Appl. 19, 511-521 (1974). MSC: 49K27 46E15 93C10 PDF BibTeX XML Cite \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 19, 511--521 (1974; Zbl 0303.49013)
Varsan, Constantin General theory of extremum problems with applications in optimal control systems. (Teoria generala a problemelor de extremum cu aplicatii la sistemele de control optimal.). (Romanian) Zbl 0286.49007 Bucuresti: Editura Academiei Republicii Socialiste Romania. 373 p. Lei 20.50 (1974). MSC: 49Kxx 49-02 PDF BibTeX XML
Vârsan, C. General conditioned optimization problems with applications to optimal control. (Romanian) Zbl 0206.15405 Stud. Cercet. Mat. 22, 117-195 (1970). MSC: 49N05 93C05 49J99 49K99 PDF BibTeX XML Cite \textit{C. Vârsan}, Stud. Cercet. Mat. 22, 117--195 (1970; Zbl 0206.15405)