In 1890 P. J. Heawood 35] published a formula which he called the Map Colour Theorem. But he forgot to prove it. Therefore the world of mathematicians called it the Heawood Conjecture. In 1968 the formula was proven and therefore again called the Map Color Theorem. (This book is written in California, thus in American English. ) Beautiful combinatorial methods were developed in order to prove the formula. The proof is divided into twelve cases. In 1966 there were three of them still unsolved. In the academic year 1967/68 J. W. T. Youngs on those three cases at Santa Cruz. Sur invited me to work with him prisingly our joint effort led to the solution of all three cases. It was a year of hard work but great pleasure. Working together was extremely profitable and enjoyable. In spite of the fact that we saw each other every day, Ted wrote a letter to me, which I present here in shortened form: Santa Cruz, March 1, 1968 Dear Gerhard: Last night while I was checking our results on Cases 2, 8 and 11, and thinking of the great pleasure we had in the afternoon with the extra ordinarily elegant new solution for Case 11, it seemed to me appropriate to pause for a few minutes and dictate a historical memorandum. We began working on Case 8 on 10 October 1967, and it was settled on Tuesday night, 14 November 1967."

Who really did 9/11? The Government? The Mossad? In this hilarious first novel, an Arab prince publicly offers $12 million dollars to anyone with proof that 4,000 Jews stayed home from their jobs at the World Trade Center on September 11. Two American Jews, hopelessly trying to save an old, dying New Jersey synagogue, come up with a desperate plan. They will present "proof" that the Jews did 9/11, and collect the Arab prince's money. The way they get this "proof," and the comic chaos that ensues, provide a funny, poignant, and touching look at Jews, Arabs, the hatred that constantly divides them, and the common humanity that ultimately binds them.