The series of conferences on Constructive Theory of Functions (CTF) are traditionally held in Bulgaria in 1970, 1977, 1981, 1984, 1987, 1991, 2002, 2005, 2008, 2010, 2013, 2016 and 2019. The primary objective of these conferences is to bring together leading members of the international community of mathematicians working in the field of Approximation Theory, Numerical Analysis and their computational aspects.

The project "CTF Proceedings Repository" is aiming to provide an open access to all scientists to the proceedings of the series CTF.

For the editors: Kamen Ivanov, Geno Nikolov, Pencho Petrushev, Rumen Uluchev