Let X be the metric space, and pX. Define a map T: BC(X) R by
T(f) = f(p)
for every fBC(X). Show that T is Lipschitz, and Lip(T) 1 (with the sup norm on BC(X) and the usual metric on R).


Here, I have to show that
∥T(f) - T(g)∥∞ ≤ λ│f(p) g(p)│
is that right ?
but how do I define ∥T(f) - T(g)∥∞ ?

and what does Lip(T) mean ?