diff --git a/generaldegreeHypersurfaces.tex b/generaldegreeHypersurfaces.tex
index 145bd88..083fdb6 100644
--- a/generaldegreeHypersurfaces.tex
+++ b/generaldegreeHypersurfaces.tex
@@ -66,6 +66,9 @@ MICIU/AEI/10.13039/501100011033 and CEX2021-001142-S-20-9.}
    harpoonluru/.code={\pgfsetarrows{tikzcd right to-tikzcd left to}},
    harpoonldrd/.code={\pgfsetarrows{tikzcd left to-tikzcd right to}},
 }
+
+\keywords{Projective hypersurfaces, homotopy type, CW-complex}
+\subjclass[2020]{Primary 14F35, 14F45, 57Q05; Secondary 14E20}
 \begin{document}