Nica, M.; Vârsan, C. Two problems for stochastic flows associated with nonlinear parabolic equations. (English) Zbl 1389.60082 Math. Rep., Buchar. 18(68), No. 2, 163-178 (2016). MSC: 60H15 60H05 35F21 35R60 PDF BibTeX XML Cite \textit{M. Nica} and \textit{C. Vârsan}, Math. Rep., Buchar. 18(68), No. 2, 163--178 (2016; Zbl 1389.60082)
Treanţă, Savin; Vârsan, Constantin Linear higher order PDEs of Hamilton-Jacobi and parabolic type. (English) Zbl 1374.35117 Math. Rep., Buchar. 16(66), No. 2, 319-329 (2014). MSC: 35G10 PDF BibTeX XML Cite \textit{S. Treanţă} and \textit{C. Vârsan}, Math. Rep., Buchar. 16(66), No. 2, 319--329 (2014; Zbl 1374.35117)
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
Damian, Virgil; Vârsan, Constantin Stochastic integral equations associated with Stratonovich curveline integral. (English) Zbl 1289.60114 Math. Rep., Bucur. 14(64), No. 4, 325-332 (2012). MSC: 60H20 PDF BibTeX XML Cite \textit{V. Damian} and \textit{C. Vârsan}, Math. Rep., Buchar. 14(64), No. 4, 325--332 (2012; Zbl 1289.60114)
Parveen, Saima; Varsan, Constantin Gradient flows with jumps associated with nonlinear Hamilton-Jacobi equations with jumps. (English) Zbl 1265.35048 Math. Rep., Bucur. 13(63), No. 3, 285-298 (2011). Reviewer: Vasily A. Chernecky (Odessa) MSC: 35F21 70H20 PDF BibTeX XML Cite \textit{S. Parveen} and \textit{C. Varsan}, Math. Rep., Buchar. 13(63), No. 3, 285--298 (2011; Zbl 1265.35048) Full Text: arXiv
Iftimie, B.; Marinescu, M.; Vârsan, C. Functionals associated with gradient stochastic flows and nonlinear SPDEs. (English) Zbl 1233.60038 Di Nunno, Giulia (ed.) et al., Advanced mathematical methods for finance. Berlin: Springer (ISBN 978-3-642-18411-6/hbk; 978-3-642-18412-3/ebook). 397-415 (2011). Reviewer: Elisa Alòs (Barcelona) MSC: 60H15 60H30 35F20 35Q35 PDF BibTeX XML Cite \textit{B. Iftimie} et al., in: Advanced mathematical methods for finance. Berlin: Springer. 397--415 (2011; Zbl 1233.60038) Full Text: DOI
Iftimie, B.; Vârsan, C. Evolution systems of Cauchy-Kowalewska and parabolic type with stochastic perturbations. (English) Zbl 1174.60035 Math. Rep., Bucur. 10(60), No. 3, 213-238 (2008). Reviewer: Iulian Stoleriu (Iaşi) MSC: 60H15 35A10 35K55 PDF BibTeX XML Cite \textit{B. Iftimie} and \textit{C. Vârsan}, Math. Rep., Buchar. 10(60), No. 3, 213--238 (2008; Zbl 1174.60035)
Iftimie, B.; Molnar, I.; Vârsan, C. Solutions of some elliptic equations associated with a piecewise continuous process. (English) Zbl 1174.60025 Rev. Roum. Math. Pures Appl. 53, No. 4, 323-338 (2008). Reviewer: Iulian Stoleriu (Iaşi) MSC: 60H10 35J70 35R60 60G44 PDF BibTeX XML Cite \textit{B. Iftimie} et al., Rev. Roum. Math. Pures Appl. 53, No. 4, 323--338 (2008; Zbl 1174.60025)
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)
Ijacu, Daniela; Molnar, I.; Vârsan, C. On some parabolic SPDE involving gradient representation of stochastic flows. (English) Zbl 1119.60305 Rev. Roum. Math. Pures Appl. 51, No. 4, 453-463 (2006). MSC: 60H15 PDF BibTeX XML Cite \textit{D. Ijacu} et al., Rev. Roum. Math. Pures Appl. 51, No. 4, 453--463 (2006; Zbl 1119.60305)
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)
Marinescu, Marinela; Vârsan, Constantin Stochastic Hamiltonians associated with finite dimensional nonlinear filters and non-smooth final value. (English) Zbl 1108.60056 Rev. Roum. Math. Pures Appl. 49, No. 1, 27-37 (2004). Reviewer: Toader Morozan (Bucureşti) MSC: 60H15 91G80 PDF BibTeX XML Cite \textit{M. Marinescu} and \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 49, No. 1, 27--37 (2004; Zbl 1108.60056)
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)
Ijacu, Daniela; Varsan, Constantin Smooth mappings and non \(\mathcal F_T\)-adapted solutions associated with Hamilton-Iacobi stochastic equations. (English) Zbl 1038.35178 Barbu, Viorel (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 (ISBN 1-4020-7439-5/hbk). 211-218 (2003). MSC: 35R60 70H20 60H15 PDF BibTeX XML Cite \textit{D. Ijacu} and \textit{C. Varsan}, in: 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. 211--218 (2003; Zbl 1038.35178)
Iftimie, Bogdan; Varsan, Constantin A pathwise solution for nonlinear parabolic equations with stochastic perturbations. (English) Zbl 1031.35156 Cent. Eur. J. Math. 1, No. 3, 367-381 (2003). MSC: 35R60 60H15 PDF BibTeX XML Cite \textit{B. Iftimie} and \textit{C. Varsan}, Cent. Eur. J. Math. 1, No. 3, 367--381 (2003; Zbl 1031.35156) Full Text: DOI Link
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)
Iftimie, B.; Vârsan, C. On the analytical computation of functional solutions associated with first order differential systems. (English) Zbl 1060.35010 Math. Rep., Bucur. 4(54), No. 1, 71-85 (2002). MSC: 35B20 39B72 PDF BibTeX XML Cite \textit{B. Iftimie} and \textit{C. Vârsan}, Math. Rep., Buchar. 4(54), No. 1, 71--85 (2002; Zbl 1060.35010)
Iftimie, B.; Vârsan, C. First-order functional equations associated with the Cauchy-Kowalewska theorem. (English) Zbl 1043.34070 Rev. Roum. Math. Pures Appl. 46, No. 5, 653-672 (2001). MSC: 34K05 PDF BibTeX XML Cite \textit{B. Iftimie} and \textit{C. Vârsan}, Rev. Roum. Math. Pures Appl. 46, No. 5, 653--672 (2001; Zbl 1043.34070)
Doroftei, M.; Vârsan, C. On first order differential equations and associated gradient systems. (English) Zbl 1018.35017 Math. Rep., Bucur. 2(52), No. 1, 21-32 (2000). MSC: 35F25 35F30 PDF BibTeX XML Cite \textit{M. Doroftei} and \textit{C. Vârsan}, Math. Rep., Buchar. 2(52), No. 1, 21--32 (2000; Zbl 1018.35017)
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)
Vasilache, T.; Vârsan, C. Singularly perturbed stochastic differential equations with dynamical limits. (English) Zbl 0841.60043 Corduneanu, C. (ed.), Qualitative problems for differential equations and control theory. Dedicated to Aristide Halanay on occasion of his 70th birthday. Singapore: World Scientific. 301-311 (1995). Reviewer: J.H.Kim (Pusan) MSC: 60H10 PDF BibTeX XML Cite \textit{T. Vasilache} and \textit{C. Vârsan}, in: Qualitative problems for differential equations and control theory. Dedicated to Aristide Halanay on occasion of his 70th birthday. Singapore: World Scientific. 301--311 (1995; Zbl 0841.60043)
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
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, 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
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. 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)