Dr. Aleksandar Milenković, Assist. Prof., Mrs. Jelena Stevanić, Assist. Prof. University of Kragujevac (Serbia) https://doi.org/10.53656/ped2025-2.06 Abstract. Lesson planning and the...

Dr. Marina Teofilova, Assoc. Prof. University of Veliko Turnovo St. Cyril and St. Methodius (Bulgaria) https://doi.org/10.53656/ped2025-2.05 Abstract. A drawing of...

Applying Delaunay Triangulation in Olympiad Problems Dragomir Grozev, Nevena Sybeva Institute of Mathematics and Informatics Bulgarian Academy of Sciences –...

Kalinka Kaloyanova1,2) 1)Faculty of Mathematics and Informatics Sofia University St. Kliment Ohridski (Bulgaria) 2)Institute of Mathematics and Informatics, Bulgarian Academy...

Ilias Solakis, Irena Atanasova South-West University “Neofit Rilski” – Blagoevgrad, (Bulgaria) https://doi.org/10.53656/math2025-1-6-uti Abstract. The Geographic Information System (GIS) is still...

Ivaylo Staribratov, Muharem Mollov University of Plovdiv Paisii Hilendarski – Plovdiv (Bulgaria) https://doi.org/10.53656/math2025-1-5-dig Abstract. This article presents a study on...

Toni Chehlarova 1), Neda Chehlarova 2), Georgi Gachev 1) 1)Institute of Mathematics and Informatics, Bulgarian Academy of Sciences (Bulgaria) 2)Institute...

Vladislav Natchev American College of Sofia (Bulgaria) https://doi.org/10.53656/math2025-1-3-apo Abstract. The definition and some of the properties of the Apollonian circle...

Nikolay Kyurkchiev1,2), Anton Iliev1), Vesselin Kyurkchiev1), Angel Golev1), Todorka Terzieva1), Asen Rahnev1) 1)University of Plovdiv „Paisii Hilendarski“ (Bulgaria) 2)Institute of...

Dragomir Grozev, Nevena Sybeva Institute of Mathematics and Informatics Bulgarian Academy of Sciences – Sofia (Bulgaria) https://doi.org/10.53656/math2025-1-1-app Abstract. Some fundamental...