"Multifractal"@en . . . "Potebnia" . <0000-0002-8162-5613> . "Reduction"@en . "5537d4bb39bc7da389105cedd4fcc04d" . <253121736> . "Artem Potebnia" . . "Computational problem"@en . "P and NP classes"@en . "Artem" . "Equivalence relation"@en .