2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158216This note proves that, as K-theory elements, the symbol classes of the de Rham operator and the signature operator on a closed manifold of even dimension are congruent mod 2. An equivariant generalization is given pertaining to the equivariant Euler characteristic and the multi-signature.8 pagesGeometric TopologyK-Theory and Homology19L99; 58J05; 19K56; 57R20Mod-2 Equivalence of the K-theoretic Euler and Signature Classestext