In this paper we show that if (X,A) is a measurable space and if
Y is a topological model of a Lawvere theory T equipped with
B the Borel σ-algebra on Y, then the set of
B-measurable functions from X to Y, Meas(X,Y),
is a set-theoretic model of T. As a corollary we give short proofs
of the facts that the set of real-valued measurable functions on a measurable
space X is a ring and the set of complex-valued measurable functions from X
to C is a ring.Comment: 11 Page