The brilliant young Mathematician Evariste Galois was killed in a duel when he was only 20. His biographer, E.T. Bell, described the last night of Galois' life this way: All night long he had spent the fleeting hours feverishly dashing off his scientific last will and testament, writing against time to glean a few of the great things in his teeming mind before the death he saw could overtake him. Time after time he broke off to scribble in the margin "I have not time; I have not time," and passed on to the next frantically scrawled outline. What he wrote in those last desperate hours before the dawn will keep generations of mathematicians busy for hundreds of years. Later biographers believe Bell's account to be a little overheated; for example, Galois did not invent his famous theorem that very night, he had been working on it for some time. Still, it is clear that when faced with almost certain death the next morning, Galois' defense was to keep doing what he d...