Fifth solution to the Apollonius’ Problem found by Bulgarian student after 2000 years

Radko Kotev, 18, a student in the National Gymnasium of Natural Sciences and Mathematics in Sofia
The Apollonius' problem formulated in 260 BC was finally solved in Bulgaria only recently. The problem is how to construct circles that are tangent to three given circles in a plane. The notorious puzzle has several variants. Originally the complex geometrical problem was set by Euclid and was further developed by his disciple Apollonius. Its original solution however was lost in the Library of Alexandria fire. So far, only four solutions of the puzzle are known achieved by famous mathematicians. Now Radko Kotev, 18, a student in the National Gymnasium of Natural Sciences and Mathematics in Sofia has become the fifth thinker worldwide to have found a solution to Apollonius’ Problem.

“Now we have powerful computers at hand”, Radko Kotev says. “With just a few clicks of the mouse we are able to wipe out everything in the draft. This helps a lot because we can see things more clearly. I have been using the computer for the things I have tried to solve. I don’t think I would have managed the same results without one.”

Radko Kotev spent two years working on the project. All the way through it, he was assisted by his teacher of mathematics. The young mathematician came up with the solution on an early morning.

“It was so strange”, he says. “I went to sleep that night, thought about the problem, and in the morning I said to myself, why not try this way. I took a sheet of paper, drew up what was needed and the solution came very easily.”

He first showed the solution to his parents who are both mathematicians, and then to his teacher. In this way Radko Kotev has found a solution to a problem that has challenged the humankind for close to 2000 years. At the European contest for young scientists in Lisbon, Portugal, there was keen interest in his project. In competition with 85 projects of students from across the world, Radko Kotev was given the Special Prize of EIROforum, a European NGO uniting 7 European research institutes. The prize included a one-week visit to the Laue-Langevin Institute (ILL) in Grenoble. In early March Radko Kotev will present his project in the world’s most modern research center. From next autumn, he hopes to start studying applied mathematics at the University of Glasgow, Scotland. This is a way for him to make a childhood dream come true – study abroad. Later he plans to be back to Bulgaria.

“I do not imagine that solving the Apollonius’ Problem should open all doors for me. I did it because I found it amusing, not for fame or career prospects. It is also the result of many years of hard work at school. I cannot say that solving this problem has been a great dream of mine – it was fun to do.”

Radko is a modest and easy-going guy. He admits some of his dreams are quite feasible – like visiting the Disneyland in Paris. Unlike his coevals he is not glued to his computer around-the-clock – he just uses it for work. He loves being with friends, reads a lot, and is a John Grisham fan. Radko has grown up in a loving family that has given him all basic values. He wishes to change the world through positive thinking and interesting ideas. What is the secret of his success?

“I have never seen mathematics as a duty. I’ve never though I should solve problems all the time and write endless home works. I have always solved problems for the fun of it. In fact, this is my hobby”, concludes young mathematician Radko Kotev.

Translated by Daniela Konstantinova

More from category

The names of 23 women killed by their partners or family member were projected on the façade of the National Assembly building in Sofia

Beat. – the art project showing how to counter domestic violence without fear

The video project Beat. by the Fine Acts foundation has been watched by more than 120,000 users in the space of just one year after being posted on different online platforms. What the authors of this intriguing social experiment are after is..

published on 6/7/19 1:42 PM

Researchers from 12 countries address environmental issues at international conference in Bourgas

Representatives of science and research centres on three continents are discussing, in Bourgas, solutions to environmental problems in different spheres. One of the items on the agenda of the international conference “Ecological..

published on 6/6/19 1:58 PM

Access to Information Program reports citizens have better knowledge of Access to Public Information Act

Lawyers from the “Access to Information Program” (AIP Foundation) have analyzed the state of access to information in Bulgaria in 2018 in a report. The report is annual and has been published since 2001 without interruption. The conclusion of..

published on 6/5/19 3:24 PM