Ljubomir Chakaloff (or Lubomir Nikolov Chakalov) was a Bulgarian mathematician.
He graduated from Sofia University in June 1908, with an honors degree in mathematics and physics.
His main contributions are in the areas of real and complex analysis, number theory, differential equations, elementary mathematics and some work on the arithmetical properties of infinite series.
In 1950 he received the Dimitrov Prize and in 1963 he was awarded the title "People's figure of culture."
[1] The National Gymnasium of Natural Sciences and Mathematics "Academician Lyubomir Chakalov" is named after him.