  In this note we prove that the algebras $L_K(E)$ and $KE$ have the same
entropy. Entropy is always referred to the standard filtrations in the
corresponding kind of algebra. The main argument leans on (1) the holomorphic
functional calculus; (2) the relation of entropy with suitable norm of the
adjacency matrix; and (3) the Cohn path algebras which yield suitable bounds
for the algebraic entropies.
