# Correction of typos in assigned reading and posting of solution for Problem 1

I have corrected the typos in the Geometric Brownian Motion, Ito’s Lemma, and Risk Neutral Valuation assigned reading; specifically, the problems that we encountered with equation (11) and the theta calculation for this equation during our class meeting today.  The corrected equation (11) now reads $f = S - K{e^{-r(T - t)}}$, and the corrected theta calculation now reads $\displaystyle\frac{{\partial f}}{{\partial t}} = - rK{e^{-r(T - t)}}$.  Furthermore, I have also posted the Solution for Risk Neutral Valuation Class Problem 1; this problem appears (along with a couple of other similar problems in my Risk Neutral Valuation Class Problems document.