### From algebraic K-theory to hermitian K-theory, by Max Karoubi

In this paper, we introduce a new morphism between algebraic and
hermitian K-theory. The topological analog is the Adams operation in
real K-theory. From this morphism, we deduce a lower bound for the
higher algebraic K-theory of a ring A in terms of the classical Witt
group of the ring A tensored by its opposite ring.

Max Karoubi <karoubi@math.jussieu.fr>