Quote:
Originally Posted by ppaquay

In problem 1.3(c)
you make the step:
w(t1) + y(t1)x(t1)^2 = w(t1)^2 + x(t1)^2 +2 y(t1)w^T(t1)x(t1)
What lemma are you basing this step on?
You can prove by simple algebraic manipulation (so no need for use of a lemma) by using w(t)=w(t1)+y(t1) and the definition of w^2 namely, w^T w