Despre noi

Grupul de cercetare se reuneşte săptămânal – marţi de la 14 la 16 în sala “e” a clădirii Mathematica.

Şedinţele au caracter de informare şi documentare relativ la direcţiile de cercetare promovate de colectiv.

Bilunar au loc expuneri plenare.

Direcţii de cercetare:

  • teoria aproximării
  • metode numerice
  • procese liniare de aproximare
  • procese aleatoare
  • ecuaţii stohastice
  • calcul paralel
  • matematici financiare

Colectivul

Prof. Dr. Agratini Octavian

COORDONATOR

Conf. Dr. Habil. Cӑtinaş Teodora

Conf. Dr. Chiorean Ioana

Conf. Dr. Habil. Lisei Hannelore

Conf. Dr. Habil. Micula Sanda

Conf. Dr. Roșca Alin Vasile

Conf. Dr. Roșca Natalia

Conf. Dr. Róth Ágoston

Conf. Dr. Soós Anna

Conf. Dr. Trîmbițaș Radu

Lect. Dr. Radu Voichița-Adriana

Lect. Dr. Somogyi Ildikó

La seminarii participă toți
STUDENȚII DOCTORANZI
care elaborează lucrarea în domeniul de cercetare al grupului.

Seminarii de cercetare

Anul universitar 2019-2020, semestrul II

  • 3 martie

Analiza numerică a influenţei temperaturii şi câmpului magnetic asupra punctului de stagnare oblic al unui nanofluid peste o placă verticală (conf. dr. Natalia Rosca)

  • 31 martie

Abordarea numerică a transferului de căldură în convecţia mixtă pentru o cavitate pătrată umplută cu un nanofluid (conf. dr. Alin Rosca)

  • 14 aprilie

Asupra unor operatori de tip Shepard cu restrictii impuse (conf. habil. dr. Teodora Cătinaș

  • 5 mai

Aproximarea functiilor prin operatorii Landau (prof. dr. Octavian Agratini)

  • 19 mai

Interpolare rationala inversa si aplicatii la rezolvarea unor ecuatii neliniare (conf. dr. Radu Trimbitas)

 

 

 

Articole notabile

Articole notabile ale membrilor colectivului, aparute incepand cu anul universitar 2017-2018:

  • Agratini, O., Properties of discrete non-multiplicative operators,  ANALYSIS AND MATHEMATICAL PHYSICS, Vol. 9, Issue 1, 2019, 131 – 141.      [cuartila 1]
  • Agratini, O., Approximation with arbitrary order by certain linear positive operators,  POSITIVITY, Vol. 22, Issue 5, 2018, 1241 – 1254.    [cuartila 2]
  • Abel, U., Agratini, O., Păltănea, R., A complete asymptotic expansion for the quasi- interpolants of Gauss-Weierstrass operators, MEDITERRANEAN JOURNAL OF MATHEMATICS, Vol. 15, Issue 4, 2018, Article 156, 10 pages.    [cuartila 1]
  • Agratini, O., Aral, A., Deniz, E., On two classes of approximation processes of integral type, POSITIVITY, Vol. 21, Issue 3, 2017, 1189 – 1199.    [cuartila 2]
  • Cătinaş, T., Extension of some particular interpolation operators to a triangle with one curved side, Applied Mathematics and Computation 315 (2017) 286-297.    [cuartila 1]
  • Lisei H., Varga Cs., Vas O., Localization method for the solutions of nonhomogeneous operator equations, Applied Mathematics and Computation 329,  64–83 (2018)    [cuartila 1]
  • S. Micula, On some iterative numerical methods for mixed Volterra-Fredholm integral equations, Symmetry, Vol. 11(10), 1200, 2019, 1-10,  doi:10.3390/sym11101200    [cuartila 2]
  • Micula, S., An iterative numerical method for fractional integral equations of the second kind, J. Comput. Appl. Math., Vol. 339, 2018, 124-133, doi:10.1016/j.cam.2017.12.006.    [cuartila 1]
  • Micula, S., Cattani, C., On a numerical method based on wavelets for Fredholm-Hammerstein integral equations of the second kind, Math. Method. Appl. Sci., Vol. 41(18), 2018. 9103-9115, doi:10.1002/mma.4952.   [cuartila 2]
  • Micula, S.,  On some iterative numerical methods for a Volterra functional integral equation of the second kind, J.Fixed Point Theory Appl., Vol. 19, 2017, 1815–1824, doi:10.1007/s11784-016-0336-6.    [cuartila 2]
  • M. Acu, O. Dogru, C.V. Muraru, V.A. Radu, Approximation Properties of Certain Bernstein–Stancu Type Operators, Journal of Mathematical Inequalities, 13 (3) (2019), 687-702.   [cuartila 2]
  •  M. Acu, T. Acar, C.V. Muraru, V.A. Radu, Some approximation properties by a class of bivariate operators, Mathematical Methods in the Applied Sciences, 42 (2019), 1-15, https://doi.org/10.1002/mma.5515    [cuartila 2]
  • M. Acu, T. Acar, V.A. Radu, Approximation by modified $U^{\rho}_n$ operators, Revista de la Real Academia de Cientias Exactas Fisicas Y Naturales Serie A-Matematicas (RACSAM), 113 (3) (2019), 2715-2729, s13398-019-00655-y.    [cuartila 1]
  • Roşca, N.C., Roşca, A.V., Pop, I., Unsteady separated stagnation point flow and heat transfer past a stretching/shrinking sheet in a copper-water nanofluid,  International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 29, Issue 8, pp. 2588-2605, 2019 [cuartila 2].
  • Roşca, A.V., Roşca, N.C., Pop, I., Stagnation point flow of a nanofluid past a non-aligned stretching/shrinking sheet with a second order slip velocity, International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 29, Issue 2, pp. 738-762, 2019 [cuartila 2].
  • Sheremet, M.A., Roşca, N.C., Roşca, A.V., Pop, I., Mixed convection heat transfer in a square porous cavity filled with a nanofluid with suction/injection effect, Computers & Mathematics with Applications, Vol. 76, Issues 11–12, pp. 2665-2677, 2018 [cuartila 1].
  • Borrelli, A., Giantesio, G., Patria, Roşca, N.C.,Roşca, A.V., Pop, I., Influence of temperature and magnetic field on the oblique stagnation-point flow for a nanofluid past a vertical stretching/shrinking sheet, International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 28, Issue 12, pp. 2874-2894, 2018 [cuartila 2].
  • Pop, I., Roşca, N.C.,Roşca, A.V., MHD stagnation-point flow and heat transfer of a nanofluid over a stretching/shrinking sheet with melting, convective heat transfer and second-order slip, International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 28, Issue 9, pp. 2089-2110, 2018   [cuartila 2]
  • Sheremet, M.A., Roşca, A.V., Pop, I., The influence of thermal radiation on unsteady free convection in inclined enclosures filled by a nanofluid with sinusoidal boundary conditions, International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 28, Issue 8, pp. 1738-1753, 2018    [cuartila 2]
  • Giantesio, G., Verna, A., Roşca, N.C., Roşca, A.V., Pop, I.,  MHD mixed convection oblique stagnation-point flow on a vertical plate, INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW, Vol. 27, no. 12, pp. 2744 – 2767, 2017;    [cuartila 2]
  • Roşca, N.C., Roşca, A. V., Merkin, J., Pop, I., Mixed convection flow, heat transfer, species concentration near the stagnation point on a vertical flat plate with Stefan coupled blowing, INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW, Vol. 27, no. 1, pp. 77 – 103, 2017;   [cuartila 2]
  • Borrelli, A., Giantesio, G., Patria, M.C., Roşca, N.C., Roşca, A.V., Pop, I., Buoyancy effects on the 3D MHD stagnation-point flow of a Newtonian fluid, COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION, Vol. 43, pp. 1-13, 2017;   [cuartila 1]
  • Roşca, N.C., Pop, I.,  A numerical study of the axisymmetric rotational stagnation point flow impinging radially a permeable stretching/shrinking surface in a nanofluid, INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW, Vol. 27, no. 11, pp. 2415 – 2432, 2017.     [cuartila 2]
  • Roşca, N.C., Pop, I., Axisymmetric rotational stagnation point flow impinging radially a permeable stretching/shrinking surface in a nanofluid using Tiwari and Das model, SCIENTIFIC REPORTS, Vol. 7, 40299, pp. 1-11, 2017.    [cuartila 1]
  • Juhász, I.,  Róth, A.Adjusting the energies of curves defined by control points, Computer-Aided Design, 107 : 77 – 88,   https://doi.org/10.1016/j.cad.2018.09.003;     [cuartila 1]
  • Róth, A.Algorithm 992: An OpenGL- and C++-based function library for curve and surface modeling in a large class of extended Chebyshev spaces, ACM Transactions on Mathematical Software, Vol. 45, No. 1, Article 13, https://doi.org/10.1145/3284979;     [cuartila 1]