Complex sentence: A set of problems formulated in this thesis for a long time attracted attention of matematicians and for example the first problem in the list, on the convergence of Fourier series of a square-integrable functions, was solved by Lennart Carleson in 1966.
Split into simpler sentences: A set of problems formulated in this thesis for a long time attracted attention from mathematicians. For example, the first problem in the list, on the convergence of the Fourier series for a square-integrable function, was solved by Lennart Carleson in 1966.