Instructions for authors

Submission of manuscripts. The Annual is published once a year.  A pdf file of the manuscript should be online submitted or sent to the e-mail address of the Editorial Board Once received by the editors, the manuscript will be subjected to rapid, but  thorough review process. If accepted, it is immediately scheduled for the nearest forthcoming issue. No page charge is made.

The submission of a paper implies that it has not been published, or is not under consideration for publication elsewhere. In case it is accepted, it implies as well that the author(s) transfers the copy right to the Faculty of Mathematics and Informatics at the Sofia University "St. Kliment Ohridski", including the right to adapt the article for use in conjunction with computer systems and programs and also reproduction or publication in machine-readable form and incorporation in retrieval systems. A printable pdf file of the published paper will be available on the journal website.

Instructions for authors. Preferences will be given to papers, not longer than 25 pages, written in English and typeset by means of LaTeX or MS Word. MS Word files will be converted to LaTeX. Templates in LaTeX and MS Word are available.

Manuscripts should be online submitted for editorial consideration in pdf format by e-mail to Upon acceptance of the paper, the authors will be asked to send the text of the papers in tex or docx format and the appropriate graphic files of the figures (if any).

The first page of manuscripts must contain a title, name(s) of the author(s), a short abstract, a list of keywords and appropriate codes according to Mathematics Subject Classification 2020 (MSC2020), see or 2012 ACM Computing Classification System (CCS), see The affiliation(s), including the electronic address, should be given at the end of the manuscript.

Figures have to be inserted in the text near their first reference. The graphic files in any format of the following jpg, png, pdf, eps should be submitted together with the final version of the manuscript after acceptance. All illustrations are to be in gray scale or black-and-white, else appropriate conversion will be done.

Tables should be inserted in the text as close to the point of reference as possible. Some space should be left above and below the table.

Footnotes must be numbered consecutively and should be brief.

References must be cited in the text in square brackets, like [3], or [5, 7], or [11, p. 123], or [16, Ch. 2.12]. They have to be numbered alphabetically by the
family name of the first author. Examples (please note order, style and punctuation of the bibliographical description of each entity):

For books: R. R. Phelps, Convex functions, monotone operators and differentiability, Second Edition, Lecture Notes in Mathematics, 1364 Springer-Verlag, Berlin, 1993.

For journal articles: J. M. Borwein and D. Preiss, A smooth variational principle with applications to subdifferentiability and to differentiability of convex functions,
Trans. Amer. Math. Soc. 303(2) (1987) 517–527.

For articles in edited volumes or proceedings: R. Deville and N. Ghoussoub, Perturbed minimization principles and applications, in: Handbook of the geometry of
Banach spaces, ed. by W. B. Johnson and J. Lindenstrauss, vol. 1, North-Holland, Amsterdam, 2001, 393–435.