I have written a brief ¡­

I have written a brief note on Pricing of Unattainable Claims . It proves (1.28) in the book in a spirit closer to the notes on linear programming. I shall follow the note when I present the proof in class tomorrow. (Added at 9.10 PM: I have just uploaded a new version of the note ¡ª in the original, stars (for discounting) seemed to have been sprinkled randomly over the manuscript!)