Факултет по машиностроене и уредостроене

Математика, физика, химия

доц. д-р Валентина Пройчева

   

Преподавател по Висша математика,  

доцент, доктор 

Научна област: Диференциални уравнения 

Дисертация: Качествени свойства на решенията на параболични уравнения с градиентна нелинейност 


Научни публикации 

[1] Bainov, D.; Petrov, V.; Proytcheva, V. Asymptotic behaviour of second order neutral differential equations with "maxima". Tamkang J. Math. 26 (1995), no. 3, 267--275. MR1365718 . 

[2] Bainov, D.; Petrov, V.; Proicheva, V. Oscillation of neutral differential equations with "maxima". Rev. Mat. Univ. Complut. Madrid 8 (1995), no. 1, 171--180. MR1356441 . 

[3] Bainov, D.; Petrov, V.; Proycheva, V. Oscillation and nonoscillation of first order neutral differential equations with “maxima”. SUT Journal of Mathematics, Vol. 31, no. 1 (1995), 17-28.  

[4] Bainov, D. D.; Petrov, V. A.; Proytcheva, V. S. Existence and asymptotic behaviour of nonoscillatory solutions of second-order neutral differential equations with "maxima". J. Comput. Appl. Math. 83 (1997), no. 2, 237--249. MR1474395 . 

[5] Bajnov, D.; Petrov, V.; Proytcheva, V. 

Oscillatory and asymptotic behavior of second order neutral differential equations with "maxima". (English)Dyn. Syst. Appl. 4, no.1, 137-146 (1995) Zbl 0814.34059.  

[6] Petrov, Vasil; Proytcheva, Valentina. Existence of positive solutions of neutral differential equations with "maxima". J. Tech. Univ. Plovdiv Fundam. Sci. Appl. Ser. A Pure Appl. Math. 5 (1997), 19-31.MR1617835.  

[7] Philippin, G. A.; Proytcheva, V. Continuous dependence on the geometry and on the initial time for a class of parabolic problems II. Math. Methods Appl. Sci. 30 (2007), no. 15, 1899--1912. MR2349757 . 

[8] Payne,L.E.; Philippin, G. A.; Proytcheva, V. Continuous dependence on the geometry and on the initial time for a class of parabolic problems I. Math. Methods Appl. Sci. 30 (2007), no. 15, 1885--1898. MR2349756. 

[9] Philippin, G. A.; Proytcheva, V. Some remarks on the asymptotic behaviour of the solutions of a class of parabolic problems. Math. Methods Appl. Sci. 29 (2006), no. 3, 297--307. MR2191431 (2007g:35109) . 

[10] Kostadinov, Todor; Proytcheva, Valentina. A not on the oscillation of second order difference neutral equations with maxima. J. Tech. Univ. Plovdiv, Fundam. Sci. Appl. Ser. A Pure Appl. Math. 8 (1999), 79--84. MR1835049 . 

[11] Kolev, Dimitar A.; Ptoytcheva, Valentina. Stability of general parabolic models and enzyme reaction processes. J Tech. Univ. Plovdiv, Fundam. Sci. Appl. Ser. A Pure Appl. Math. 9 (2000/01), 81--90. MR1960993 . 

[12] Philippin,G.A.; Proytcheva,V.; S.Vernier-Piro. Continuous dependence results for a class of nonlinear heat equations in a cylindrical region. Math. Methods Appl. Sci. 32 (2009), 330—345. 

[13] Proytcheva, V. An improperly posed problem for the one-dimensional heat equation. J. Tech. Univ .Plovdiv,Fundam. Sci. Appl. Vol. 14(2009),International Conference Engineering, Technologies and Systems.  

[14] Proytcheva,V. Explicit norm inequalities for solutions of some Dirichlet boundary value problem. J. Tech. Univ. Plovdiv, Fundam. Sci. Appl . Vol . 14 (2009). 

[15] Proytcheva,V. Variation principles for the conformal capacity problem. J. Tech. Univ. Plovdiv Fundam. Sci. Appl . (to appear). 

[16] Kolev, Dimitar A.; Ptoytcheva, Valentina. Static solutions for one - dimensional reaction – diffusion models. J. Tech. Univ. Plovdiv, Fundam. Sci. Appl. (to appear). 


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