2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221104An algebra with identities $a\circ(b\circ c-c\circ b)=(a\circ b)\circ c-(a\circ c)\circ b$ and $a\circ(b\circ c)=b\circ(a\circ c)$ is called Novikov. We show that Novikov operad is not Koszul.5 pagesRings and Algebras16R10; 17A50; 17A30; 17D25; 17C50text