2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97041Cohomology theory of links, introduced by the author, is combinatorial. Dror Bar-Natan recently wrote a program that found ranks of cohomology groups of all prime knots with up to 11 crossings. His surprising experimental data is discussed in this note.17 pages, 13 figuresQuantum Algebra57M25text