Papers
Papers,
ISI Journals
J. Brzdek, D. Popa, B.Xu, A
note on stability of the linear functional equation of higher
order and fixed points of an operator, Fixed point
theory, accepted paper.
N. Lungu, D. Popa, On the Hyers-Ulam
stability of a first order partial differential equation,
Carpathian. J. of Mathematics, accepted paper.
N. Lungu, D. Popa, Hyers-Ulam
stability of a first order partial differential equation,
J. Math. Anal. Appl., 385(2012), 86-91.
D. Popa, I.Rasa, The
Frechet functional equation with application to the stability of
certain operators, Journal of
Approximation Theory, 164(2012), 138-164.
D. Popa, I. Rasa, On
the Hyers-Ulam stability of the linear differential equation, J.
Math. Anal. Appl., 381(2011), 530-537.
J. Brzdek,
D. Popa, B.Xu, Note on nonstability
of the linear functional equation of higher order,
Computer&Mathematics with Applications,
62(2011), 2648-2657.
J. Brzdek, D. Popa, B. Xu, On
approximate solutions of the linear functional equation of higher
order, J. Math. Anal. Appl.
373(2011), 680-689.
D.S. Cimpean, D. Popa, Hyers-Ulam
stability of Euler’s equation,
Appl. Math. Lett. 24(2011), 1539-1543.
J. Brzdek, D. Popa, B. Xu,
Selections of set-valued maps satisfying a linear inclusion in
single variable, Nonlinear
Analysis-TMA, 74(2011), 324-330.
M.S.Moslehian, D. Popa, On
the stability of the first-order linear recurrence in topological
vector spaces,
Nonlinear Analysis: TMA
73(2010) , 2792-2799.
J. Brzdek, D. Popa, B. Xu, On
nonstability of the linear recurrence of order one,
Journal of Mathematical Analysis an Applications, 367(2010),
146-153
J.Brzdek, D. Popa, B.Xu, Remarks
on stability of linear recurrence of higher order,
Appl.Math.Lett.23(2010), 1459-1463.
D. S. Cimpean , D.Popa,
On
the stability of the linear differential equation of higher order
with constant coefficients,
Appl. Math. Comput., 217(2010), 4141-4146.
K.Nikodem, D.Popa, On
single valuedness of set- valued maps satisfying linear
inclusions, Banach
J.Math.Anal.3(2009), 44-51.
K.Nikodem, D.Popa,
On selections of general linear inclusions,
Publ. Math. Debrecen 75(2009), 239-249.
M.S.Moslehian, K. Nikodem, D.Popa,
Asymptotic aspect of the quadratic
functional equation in multinormed spaces,
J. Math. Anal. Appl.355(2009), 717-724.
D. Popa, On
the stability of the general linear equation,
Results in Mathematics, 53(2009), 383-389.
J. Brzdek, D. Popa, Xu Bing, Hyers-Ulam
stability for linear equations of higher orders, Acta
Mathematica Hungarica, 1-2(2008), 1-8.
J. Brzdek, D. Popa, Xu Bing, The
Hyers-Ulam Stability of Nonlinear Recurrences,
J. Math. Anal. Appl. 335, 1(2007), 443-449. MR 2340333, Zbl
1123.39022.
J. Brzdek, D. Popa, Xu Bing, Note
on nonstability of the linear recurrence,
Abh. Math. Sem. Univ. Hamburg, 76(2006), 183-189. MR
2293441.
D. Popa, Hyers-Ulam
stability of the linear recurrrence with constant coefficients,
Adv. Difference Equ. 2(2005), 101-107. MR 2197125,Zbl 1095.39024.
D. Popa, Hyers-Ulam-Rassias
stability of a linear recurrence,
J. Math. Anal. Appl. 309(2005), 591-597. MR 2154138, Zbl
1079.39027
D. Popa, Functional
inclusions on square-symmetric grupoids and Hyers-Ulam stability,
Mathematical Inequalities and Applications. MIA 2(2004), 419-428.
MR 2077819, Zbl 1058.39026
Papers,
International
Data Bases
D. Popa,
A property of a functional inclusion connected with Hyers-Ulam
stability,
Journal of Mathematical
Inequalities, 4(2009), 591-598.
D. Popa, I. Raşa, Inequalities
involving the inner product, J.
Pure Math. Appl. 8(3)(2007), art. 3. MR2345941, Zbl 05224796
D. Popa, N. Lungu, On
an operatorial inequality,
Demostratio Math. 3(2005), 668-674. MR 2161370, Zbl 02226700.
D. Popa, N. Vornicescu, Locally
compact set-valued solutions for the general linear equation,
Aequationes Math. 67(2004), 205-215. MR 2162227, Zbl 1054.39016
D. Popa, A
stability result for a general linear inclusion,
Nonlinear Funct. Anal. Appl. 3(2004), 405-414. MR 2101188, Zbl
1067.39043
D. Popa, Hyers-Ulam
stability of the first order linear recurrence,
Pure Math.Appl. 2-3(2004), 285-293. MR 2182013, Zbl 1112.39024
D. Popa, Semicontinuity
of locally p-convex and locally p-concave set-valued maps,
Mathematica, 45(2003), 179-184. MR 2056050, Zbl 1084.545112D.
D. Popa, Hyers-Ulam-Rassias
stability of the general linear equation,
Nonlinear Funct. Anal. Appl. 4(2002), 581-588. MR 1959637, Zbl
1031.39021
D. Popa, Semicontinuity
of a class of genelalized convex and a class of generalized
concave set-valued maps,Pure
Math.Appl.(PU.M.A),11-2 (2002), 369-374. MR 1839943, Zbl
1062.54020
D. Popa, Additive
selections of (a, b)-subadditive set-valued maps,
Glas. Mat. 36(56)(2001), 11-16. MR 1842820, Zbl 1039.28013
D. Popa, Hyers-Ulam
Stability of the Pexider equation,
Proceedings of ROGER - 2000, Gerhard Mercator Univ.Duisburg,
115-120. MR 1817271, Zbl 0990.39026.
D. Popa, Set-valued
solutions for an equation of Jensen type,
Rev. Anal. Numer. Theor. Approx., 1(1999), 73-77. MR 1881350, Zbl
1075.39540
Papers,
Romanian Journals
D.Popa, On
the stability of the Gamma discrete functional equation,
Automat.Comput.Appl.Math.,17(2008),
543-549.
O.M. Gurzau, D. Popa, T.
Marita, M. Lucan, Mathematical and
experimental models of the heat transfer in tissues,
Automat. Comput. Appl. Math., 16(3)(2007), 67-73.
D. Popa, On
the continuity of generalized convex set-valued maps,
Automat. Comput. Appl. Math., 16(2)(2007), 299-305.
D. Popa, I. Rasa,
Hermite-Hadamard type inequalities,
Automat. Comput. Appl. Math. 15(2006), No. 1, 7-9.
C.Sandea,D.Popa, Iterative
procedure for solving a concurential populational model with
medical applications, Applied
Medical Informatics, 18(2006),30-33.
D. Popa, A
representation of p-convex set-valued maps with values in R,
Studia Univ. Babes-Bolyai 4(2003), 77-81. MR 2107577, Zbl
1067.54507
D. Popa, A
remark on a functional equation,
Automat. Comput. Appl. Math. 2(2003), 65-68.
D. Popa, A
generalization of Jensen equation for set-valued maps,
Sem. on fixed point theory, 3(2002), 317-322. MR 1929776, Zbl
1022.39024
D. Popa, N. Lungu, On
some differential inequalities,
Sem.on fixed point theory, 3(2002), 323-326. MR 1929777, Zbl
1028.34009
D. Popa, The
stability of a generalization of Jensen equation,
Automat. Comput. Appl. Math. 10( 2001), 36-39.
D. Popa, I.R. Peter, Some
properties of polyholomorphic maps,
Automat.Comput. Appl. Math. 10(2001), 43-48.
D. Popa, p-Convex
set-valued maps with values in R,
General Mathematics 6(1998), 80-84. MR 1942296, Zbl 1052.49500
D. Popa, Continuity
of additive set-valued maps,
Automat. Comput.Appl. Math. 1 (1998), 31-34. MR 1886375
D. Popa, On
single valuedness of some classes of set-valued maps,
Automat. Comput. Appl. Math. 2 (1997), 42-46. MR 1887369.
D. Popa, An
inequality in inner product spaces,
General Mathematics 1 (1994),29-32. Zbl 0881.26018
D. Popa, On
the Aczél inequality, Bul.
Stiint. Int. Politehn. Cluj-Napoca, 34(1991), 157-160. MR 1285652
D.Popa,
Asupra
calculului unor limite de siruri,
RMT 3(1997), 9-12
Proceedings
- International Conferences
D.Popa, Approximate
solutions of the linear equation, Int
.Series of Numerical Math.vol.157(2008), 299-304.
D. Popa, Hyers-Ulam
Stability of a second order linear recurrence,
Mathematical Analysis and Approximation Theory, Proceedings of
RoGer (2004), 181-188.
D. Popa, Some
remarks on additive, affine and convex multifunctions,
Proceedings of the 10th
Symposium of Mathematics and its Applications,
Timişoara (2003), 126-129. MR 2232787
D. Popa, On
the continuity of a class of generalized convex set-valued maps,
Mathematical Analysis and Approximation Theory, Burg Verlag
(2002), 221-226. MR 2076835, Zbl 1033.54010
D. Popa, Some
convergence properties in the space of fractals,
Proceedings of Int. Workshop " Trends and recent
achievements in information technology", May 2002
Cluj-Napoca, pag.94-95
D. Popa, Approximately
convex set-valued maps .Symposium
on Math. and Appl. - Timişoara (2001), 123-126. MR 2224315
D. Popa, On
the stability of a functional equation,
Numerical Analysis and Approx. Theory, Cluj-Napoca, 2002,
404-410. MR 2006948, Zbl 1051.39030
Books
D.Inoan,
A. Novac, D. Popa, Probleme
de Analiza Matematica, Editura Mega, 2011, ISBN
978-606-543-165-2
D.
Popa, Functional equations.
Set-valued solutions. Stability, Ed. UTPress, 2006, ISBN
978-973-662-223-6
D. Popa, Calculus,
Ed. Mediamira 2006, ISBN 973-713-144-4
D. Popa, Calcul
integral, Ed. Mediamira, 2005,
ISBN 973-713-029-4
D. Popa (în
colaborare), Calcul diferenţial,
Editura Mediamira,2004, ISBN 973-713-008-1
D. Popa (in colaborare)
Analiza matematica – Culegere
de probleme, UT Press-2002, ISBN
973-9357-20-2
D. Popa, Incluziuni
şi inegalităţi funcţionale,
Editura Todesco, 2002, ISBN 973-8198-40-2
D. Popa, Analiză
matematică - calcul diferenţial,
Casa de Editură Transilvania Press, 2000, ISBN 973-98180-4-8
D. Popa (et al.), Probleme
de analiză matematică - calcul integral,
Editura UT Pres, 2000, ISBN 973-9471-44-7
I. Muntean, D. Popa, Metoda
şirurilor recurente, Editura
Gil. 1995, ISBN 973-97135-5
Reviewer
for the Journals
Abstract and Applied Analysis
Journal of Mathematical Analysis and Applications
Nonlinear Analysis, Theory, Methods&Applications
Advances in Difference Equations
Applied Mathematics Letters
Fixed Point Theory
Publicationes Mathematicae Debrecen
Results in Mathematics
Journal of Mathematical Inequalities
Journal of Inequalities&Applications
Bulletin of the Malaysian Mathematical Science
Society
Boletino de la Sociedad Matematica Mexicana
Aequationes Mathematicae
Carpathian Journal of Mathematics
JIPAM
Studia Univ. Babeş-Bolyai
Automation Computers Applied Mathematics
Last Updated: February
18, 2012
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