Слоения и ветвящиеся поверхности в дополнениях к зацеплениям

New channel Маломерная топология: title sample judged 'whole' (This is a genuine research seminar in low-dimensional topology with every upload being a long technical lecture or talk ); passed a second screen for sellers/exam-prep/re-uploads; 3 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.