Treanţă, Savin; Vârsan, Constantin Weak small controls and approximations associated with controllable affine control systems. (English) Zbl 1279.93037 J. Differ. Equations 255, No. 7, 1867-1882 (2013). MSC: 93B25 93C15 93C05 PDF BibTeX XML Cite \textit{S. Treanţă} and \textit{C. Vârsan}, J. Differ. Equations 255, No. 7, 1867--1882 (2013; Zbl 1279.93037) Full Text: DOI
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)
Marinescu, Marinela; Molnar, I.; Vârsan, C. A global variational principle associated with gradient stochastic control systems. (English) Zbl 1119.93070 Rev. Roum. Math. Pures Appl. 51, No. 3, 331-343 (2006). Reviewer: Corneliu Ursescu (Iaşi) MSC: 93E20 49K45 PDF BibTeX XML Cite \textit{M. Marinescu} et al., Rev. Roum. Math. Pures Appl. 51, No. 3, 331--343 (2006; Zbl 1119.93070)
Vârsan, C.; Popescu-Bodorin, N. Stochastic Hamiltonians associated with stochastic differential equations and non-smooth final value. (English) Zbl 1150.60398 Math. Rep., Bucur. 5(55), No. 4, 399-411 (2003). MSC: 60H15 93C42 PDF BibTeX XML Cite \textit{C. Vârsan} and \textit{N. Popescu-Bodorin}, Math. Rep., Buchar. 5(55), No. 4, 399--411 (2003; Zbl 1150.60398)
Barbu, Viorel (ed.); Lasiecka, Irena (ed.); Tiba, Dan (ed.); Varsan, Constantin (ed.) Analysis and optimization of differential systems. IFIP TC7/WG 7. 2 international working conference, Constanta, Romania, September 10–14, 2002. (English) Zbl 1012.00037 IFIP Advances in Information and Communication Technology. 121. Boston, MA: Kluwer Academic Publishers (ISBN 1-4020-7439-5/hbk; 978-0-387-35690-7/ebook). x, 442 p. (2003). MSC: 00B25 34-06 35-06 93-06 PDF BibTeX XML Cite \textit{V. Barbu} (ed.) et al., Analysis and optimization of differential systems. IFIP TC7/WG 7. 2 international working conference, Constanta, Romania, September 10--14, 2002. Boston, MA: Kluwer Academic Publishers (2003; Zbl 1012.00037)
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
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)
Iwata, Naofumi; Mizukami, Koichi; Vârsan, Constantin Quasi-optimal feedback for linear differential games. (English) Zbl 0593.90094 Analysis and algorithms of optimization problems, Lect. Notes Control Inf. Sci. 82, 168-184 (1986). MSC: 91A23 91A60 93E20 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, 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
Mizukami, K.; Varsan, C. Quasi-optimal feedback laws. (English) Zbl 0515.93022 Rev. Roum. Math. Pures Appl. 27, 1027-1051 (1982). MSC: 93B50 93C05 93E20 35K55 49J30 93B03 93B05 49J55 PDF BibTeX XML Cite \textit{K. Mizukami} and \textit{C. Varsan}, Rev. Roum. Math. Pures Appl. 27, 1027--1051 (1982; Zbl 0515.93022)
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
Halanay, A.; Morozan, T.; Varsan, C. Optimal feedback under random perturbations. (English) Zbl 0472.93074 Probability theory, Proc. 6th Conf., Brasov/Romania 1979, 91-101 (1981). MSC: 93E20 93E15 90C39 49K45 49L20 PDF BibTeX XML
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. 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. 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)
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)