The journal Mathematica was founded in 1929 at the University of Cluj by Petre Sergescu. The publication of the journal was interrupted between 1948 and 1959. Since 1959 "Mathematica" is published as a new series, continuing the traditions of the old one, under the auspicies of the Romanian Academy. It appears in one volume a year, consisting of 2 issues with a total average number of pages yearly of 250. It is indexed or abstracted in Mathematical Reviews and Zentralblatt fur Mathematik. The journal publishes original papers, preferably written in English, but also in French, German or Italian, in any area of pure and applied mathematics. The topics cover all branches of Mathematics: Algebra, Group Theory, Lie Algebras, Logic, Combinatorics, Number Theory, Mathematical Analysis, Functional Analysis, Numerical Analysis, Potential Theory, Complex Analysis, Ordinary Differential Equations, Partial Differential Equations, Optimal Control, Geometry, Algebraic Geometry, Topology, Dynamical Systems, Probability Theory, Statistics, Mathematical Physics, Fluid Mechanics, Solid Mechanics, Calculus of Variations, Mathematical Problems in Sciences, Operational Research. In addition to presenting research papers, Mathematica publishes the proceedings of international conferences held in Romania, survey articles and book reviews. The Editors will put strong emphasis on originality and applicability of the results. All manuscripts are strictly refereed and only papers of high quality are accepted for publication. The journal is addressed to all pure and applied mathematics and to other specialists interested in modern developments of mathematics and in using mathematics in research, teaching and technology. The journal has in present a number 170 exchanges with journals of repute from all over the world.