## Short Communications

**Section 1 (Algebra, Discrete Mathematics, Combinatorics and Number Theory)
**

- Risto Atanasov, Groups and loops partitioned by subgroups
- Valentina Miovska, Vesna Celakoska-Jordanova, Vector valued hyperstructures
- İbrahim Şentürk, Tahsin Öner, Categorical syllogisms on Heyting algebras
- Arben Baushi, Characteristic of tiling generated by a root of polynomial P(x) = x^4 – 3x^3 + x^2 – 2x – 1
- Lidija Gorachinova-Ilieva, Emilija Spasova-Kamcheva, An algebraic representation of a class of homogeneous Steiner quadruple systems
- Aleksandar Bikov, Nedyalko Nenov, The edge Folkman number $F_e(3, 3; 4)$ is greater than 19

**Section 2 (Complex Analysis, Real Analysis and Functional Analysis)
**

- Teodor Bulboacă, On the theory of differential subordination and superordination
- Samoil Malcheski, Some characterizations of 2-inner product
- Samoil Malcheski, Katerina Anevska, Risto Malcheski, A characterization of strictly convex 2-normed space
- Katerina Anevska, Risto Malčeski, Remark about characterization of 2-inner product
- Kastriot Zoto, Ilir Vardhami, Common fixed points in b-dislocated metric spaces using (E.A) property
- Nikola Tuneski, David Shoikhet, Mark Elin, Some results about a filtration of starlike functions
- Paul Gauthier, Approximation by: Riemann zeta-function; polynomials (rational functions) with constrained zeros (poles)
- Ekrem (Aljimi) Alimi, Elida Hoxha, Florim Hyseni, Xhevdet Thaqi, Approximation for periodic functions via weighted A-statistical convergence for sequences of positive linear operators
- Dilek Söylemez, On modified Bleimann, Butzer and Hahn approximation operators
- Anila Duka, Ndricim Sadikaj, On quasiconformal selfmappings of the unit disk and the unit ball
- Ledia Subashi, Properties of a tiling generated by the golden ratio
- Delčo Leškovski, TBA
- Zerrin Önder, Ümit Totur, Ibrahim Çanak, Statistical extensions of some classical Tauberian theorems for Cesàro summability of triple sequences
- Milutin Obradovic, Recent results on a class of univalent functions
- Stela Çeno, Gladiola Tigno, Asymmetric inner product and asymmetric quasi norm function
- Martin Lukarevski, Samoil Malcheski, Sequentially convergent mappings and common fixed points of mappings in 2-Banach space
- Aleksa Malceski, Alit Ibrahimi, Risto Malceski, Extending Kannan and Chatterjea theorems in 2-Banach spaces by using sequentially convergent mappings

**Section 3 (Differential Equations and Dynamical Systems)**

- Ekaterina Madamlieva, Loreta Kasmska, Snezhana Hristova, Approximate method for the initial value problem for impulsive difference equations
- Maya Mincheva, Multistationarity in reaction networks models
- Ahmet Yantir, On continuous dependence of solutions of dynamic equations
- Billur Kaymakçalan, Second order dynamic operator with transmission conditions and associated contractive operator
- Burcu Silindir Yantir, On integrable extensions
- Seda Kızılbudak Çalışkan, Serpil Uslu, Spectral properties of eigenvalues and eigenfunctions of a discontinuous boundary value problem with retarded argument
- Zerrin Özçubukcu, Oya Ünal, On the regularized trace formula of the second order differential operator equation with semi-periodic boundary conditions
- Diana Dolićanin-Đekić, Strongly isochronous centers of two-dimensional cubic systems with degenerate infinity
- Lazo Dimov, On the types of linear differential equations of second order and their solutions
- Gjorgji Markoski, Monika Peshevska, Aleksandar Gjurchinovski, Extended discrete transformation method for nonlinear systems of ordinary and fractional differential equations
- Slagjana Brsakoska, About the zeros and the oscillatory character of the solution of one areolar equation of second order
- Biljana Zlatanovska, Approximation for the solutions of Lorenz system with systems of differential equations
- Boro Piperevski, For one system differential equations dual of the system of Lorenz

**Section 4 (Topology, Geometry, Differential Geometry and Mathematical Physics)
**

- Kostadin Trencevski, Application of the geometry of curves in 3-dimensional Euclidean space
- Şerife Nur Bozdağ, Ali Çalişkan, Analysis of curves with Lie groups
- Akifumi Sako, Noncommutative Kähler Manifolds and their Fock representations
- Ferihe Atalan, Elif Medetoğullari, Birman-Hilden property and Non-orientable surfaces
- Ivko Dimitric, Hypersurfaces of quaternionic projective space of Chen type 2
- Ndricim Sadkaj, Anila Duka, Equations of motion of classical non-relativistic strings and relativistic strings
- Tomi Dimovski, Donco Dimovski, Convergence of sequences in (3, j, \rho)-N-metrizable spaces, j\in {1,2}
- Ndricim Sadkaj, Anila Duka, Some examples of Calabi–Yau manifolds
- Vildan Özdemir, Tunahan Turhan, Nihat Ayyildiz, Some characterizations of point-line trajectories in Lorentz 3-space
- Tunahan Turhan, Vildan Özdemir, Nihat Ayyildiz, On matrices and vector field in Minkowski 3-space
- Vildan Özdemir, Tunahan Turhan, Nihat Ayyildiz, Kinematic geometry of pseudo-spherical evolutes
- Gjorgji Markoski, Abdulla Buklla, On product of quasicomponents
- Sonja Čalamani, Dončo Dimovski, Marzanna Sevveryn-Kuzmanovska, Theorems of metrizations in (3,j,ρ)-B-metrizable spaces, j\in {1,2}
- Zoran Misajleski, Nikita Shekutkovski, Connection between strong proximative and strong approximative sequences

**Section 5 (Probability, Statistics, Numerical Mathematics and Optimization)**

- Veska Noncheva, Imputation of missing categorical values in survey research data
- Maria Dobreva, Ivan Chenchev, Clinical evaluation of treatment of gingival recessions supported by Bayesian statistics
- Mehmet Ünver, Gökhan Özçelik, Identification of a fuzzy measure that meets redundancy among criteria in Multicriteria Decision Making Problem
- Gökhan Özçelik, Cevriye Temel Gencer, A Game Theoretical Approach for Supplier Interdiction on Single Echelon Supply Chain in Competitive Environment
- Esin Avci, Using Informative Prior from Meta Analysis in Bayesian Approach
- Lazim Kamberi, Ylldrita Seferi, Dashmir Ibishi, Using Queueing theory-M/M/1 in Hospital Tetovo
- Marko Dimovski, Irena Stojkovska, Regularized least-square optimization method for variable selection in regression models
- Milena Kresoja, Marko Dimovski, Irena Stojkovska, Zorana Lužanin, Stochastic approximation with adaptive step sizes for optimization in noisy environment and its application in regression models
- Filip Nikolovski, Irena Stojkovska, Complex-step gradient approximation and performance analysis of nonmonotone optimization algorithms in noisy environment
- Marija Stanić, An optimal set of quadrature rules for trigonometric polynomials
- Aneta Gacovska-Barandovska, Elisaveta Pancheva, An example on application of randomly indexed central order statistics
- Behar Baxhaku, Fevzi Berisha, Statistical approximation properties of bivariate extension of q-Lupaş-Stancu operators

**Section 6 (Actuarial Mathematics, Mathematical Finance and Modeling in Economy)
**

- Stevo Gjorgiev, Vlatko Kochovski, An approach to the Income function movement when its components change according to the principle of the geometric progression

**Section 7 (Mathematical Aspects of Computer Sciences)
**

- Anastasios Papapostolu, Dimitar Birov, A pi-calculus ADL for semi-automatic code generation
- Artan Berisha, Faton Berisha, Modified AES for increasing data security and its parallel implementation
- Mimoza Petrova, Vanco Cabukovski, Roman Golubovski, Supporting education in math sciences with a low-budget LMS SAKAI
- Igor Janevski, Vanco Cabukovski, Roman Golubovski, Mathematical calibration of sensors for embedded applications

**Section 8 (History of Mathematics and Mathematics Education)
**

- Sava Grozdev, Deko Dekov, Computer Discovered Mathematics and Applications in Education
- Vesna Celakoska-Jordanova, Emilija Celakoska, Mathematical terminology: On the names of fractions in the Macedonian language
- Vesna Celakoska-Jordanova, Emilija Celakoska, Names of foreign mathematicians in the mathematical literature in Macedonian
- Metodi Glavche, Katerina Anevska, Risto Malcheski, Better integrated teaching of geometry and algebra in primary education
- Jasmina Markoska, Gjorgji Markoski, Geometrical solving of some systems of equations
- Gordana Nikolovska, Irena Stojkovska, Algebraic Strategies for Predictions in Elementary Mathematics Education
- Biljana Shuminoska, Irena Stojkovska, Mathematical modeling in mathematics education through solving realistic Fermi problems
- Branislav Popović, Infinity in mathematics teaching in primary school
- Borislav Lazarov, Albena Vassileva, Age Factor Index in a Math Contest Paper for 5
^{th}and 6^{th}Grade Students - Slagjana Jakimovik, Early learning of mathematics and the use of picture books in teaching
- Ana Donevska-Todorova, An overview on the curricula for linear algebra in the Macedonian gymnasiums
- Marijana Toshevska, Math teachers’ past and current experience affecting their future test grading
- Mejdin Saliji, Aneta Velkovska, Donco Dimovski, Analysis of tasks and tests in mathematics for eighth grade in nine-years primary school
- Jasmina Markoska, Gjorgji Markoski, Examination of the students’ previous knowledge before and after the first year of secondary education
- Risto Atanasov, Online homework systems in Calculus
- Risto Atanasov, Teaching online mathematics course for undergraduate students
- Boce Mitrevski, Aneta Gacovska-Barandovska, Lambe Barandovski, Application of math knowledge in solving problems of geometrical optics
- Valentina Miovska, Aneta Gacovska-Barandovska, Most frequent errors and misconceptions of first year math students in high school problems
- Valentina Gogovska, Logical fallacies as a tool for empowering students’ thinking and reasoning in math classes
- Zoran Trifunov, Marice Lazarovska, Solving real-life problems for increasing the motivation of students in learning mathematics

**Students Institute**

- Vera Dimovska, Combinatorial game theory: An analysis of a fair game
- Paolina Gadjulova, Simulation of an ecosystem with three species on a toroidal lattice
- Vanessa Getseva: Haplotype phasing of structural variations in genomes of individuals
- Filip Selamovski, Analysis of terrorism through game theory