On a sum involving the Euler function

Some extremal functions in Fourier analysis

Jeffrey D. Vaaler · Bulletin of the American Mathematical Society · 1985 · 379 citations · Full text

Natural Sciences, Mathematics, Physics +6

On a sum involving the Euler totient function

Jie Wu · Indagationes Mathematicae · 2019 · 20 citations · Full text

Natural Sciences, Oceanography, Seismology +3

On Euler's function

Haosheng Liu · Proceedings of the Royal Society of Edinburgh Section A Mathematics · 2016 · 13 citations

Natural Sciences, Mathematics, Physics +4