THE LAST THEOREM charts the story of Ranjit Subramanian, a man fascinated by Fermat's Last Theorem--so simple that anyone can understand it, yet not proved for more than three centuries. Ranjit learns about the Indian mathematical genius Ramanujan (1887-1920) and discovers a three-page proof of the Last Theorem: this might even be Fermat's own proof. The discovery of the Theorem wins Ranjit the Fields Medal - and the attention of the NSA cryptography branch. However, Ranjit soon finds himself drawn by physics rather than cryptography, as there have been some spectacular recent advances in fusion technology. And these in turn lead to a plasma drive that can open up the Solar System.

Chapter One


ON SWAMI ROCK

And so now, at last, we meet this Ranjit Subramanian, the one whose long and remarkable life this book is all about.

At this time Ranjit was sixteen years old, a freshman at Sri Lanka's principal university, in the city of Colombo, and more full of himself than even your average sixteen- year- old. He wasn't at the university now, though. At his father's bidding he had made the long trip from Colombo slantwise across the island of Sri Lanka to the district of Trincomalee, where his father had the distinction of being chief priest at the Hindu temple called Tiru Koneswaram. Ranjit actually loved his father very much.

He was almost always glad to see him. This time, however, he was a bit less so, because this time Ranjit had a pretty good idea of what the revered Ganesh Subramanian wanted to talk to him about.

Ranjit was an intelligent boy, in fact one who was quite close to being as smart as he thought he was. He was a good- looking one, too. He wasn't terribly tall, but most Sri Lankans aren't. Ethnically he was a Tamil, and his skin color was the rich dark brown of a spoonful of cocoa powder, just before it went into the hot milk. The skin color wasn't because he was a Tamil, though. Sri Lankans have a rich palette of complexions from near- Scandinavian white to a black so dark it seems almost purple. Ranjit's best friend, Gamini Bandara, was pure Sinhalese for as many generations back as anyone had bothered to count, but the boys were the same in skin hue. The boys had been friends for a long time--since that scary night when Gamini's school had burned to the ground, probably put to the torch by a couple of upperclassmen smoking forbidden cigarettes in a storage room.

Like every other nearby human being capable of picking up a splintered piece of plywood and throwing it on the back of a truck, Ranjit had been drafted for emergency relief work. So had all the rest of the student body of his own school. It had been a dirty job, a lot harder than a youngster's developing muscles were used to, not to mention the splinters and the scrapes and the endless cuts from the broken glass that was everywhere. Those were the bad parts, and there were plenty of them. But there were good parts, too. Like the time when Ranjit and some other boy around his own age finally got down to the source of some plaintive sounds that were coming from a debris pile, and released the headmaster's terrified, but intact, elderly Siamese cat.

When a teacher had carried the cat off to its owner, the two boys had stood grinning at each other. Ranjit had stuck his hand out, English fashion. "I'm Ranjit Subramanian," he'd said.

"And I'm Gamini Bandara," the other boy had said, pumping his hand gleefully, "and, hey, we did a pretty good job here, didn't we?"

They agreed that they had. When at last they had been allowed to quit work for the day, they had lined up together for the sort of porridge that was their evening meal, and plopped their sleeping bags next to each other that night, and they had been best friends ever since. Helped out, to be sure, by the fact that Gamini's school had been made uninhabitable by the fire and so its students had to double up at Ranjit's. Gamini turned out to be pretty much everything a best friend could be, including the fact that the one great obsession in Ranjit's life, the one for which there was no room for another person to share, didn't interest Gamini at all.

And, of course, there was one other thing that Gamini was. That was the part of Ranjit's impending talk with his father that Ranjit least wanted to have.

Ranjit grimaced to himself. As...