Title: Numbered (1/?)
Fandoms: Hikaru no Go / Numb3rs
Characters: Hikaru, Akira, Amano. Mention of Sai.
Wordcount/Rating/Warnings: 900+ words / gen / crossover AU
Summary: When an amateur mathematician calls the police to report a missing person, Touya Akira meets Shindou Hikaru.
Spoilers/Author's Notes: Written for kitsunejade for her correct guess in blindgo. No math knowledge required to read this fic.
Disclaimer: I am not a mathematician. Luckily, I have friends who are. Thanks to R. Svegstrup for looking over the pseudo-math and acting as beta.

"There doesn't seem to have been a struggle," Detective Amano said, sharing a look with his colleague.

"I'm telling you, he wouldn't have just left like that," Shindou Hikaru said obstinately. "Sai was a genius. He was-- We were working on something really revolutionary. He's been working on Hilbert's twelfth conjecture ever since Hilbert announced-- Er, I mean, ever since he came across it. He was THIS CLOSE to it! And he--"

"Hilbert's twelfth conjecture?"

The shout of surprise came from the door. The three men in the room turned to see a young man with straight black hair cut straight across at chin-length, standing at the door with a look of shock. At his feet were scattered papers and folders, evidently dropped a moment ago.

Detective Amano was the first to recover. "Akira-kun," he said, giving his partner a nudge to help with the papers, before moving forward himself.

Touya Akira waved the other man away. "Please don't--only I recognize the pages and can put them back in order again."

Shindou was already on his knees, a mismatched and very untidy sheaf of papers in his hands. Touya reached out for the papers in Shindou's hands, but Shindou was now leafing through them.

Touya cleared his throat politely. "Excuse me. I'd like them ba--"

"Elliptic curves and Abelian fields," Shindou said, looking up with wary interest. "Sai was working on the same thing."

Touya's eyes narrowed. "For over one hundred years?"

Shindou's eyes widened in surprise. "You know about Hilbert's Paris lecture?"

"Yes," Touya said. "However, I've never met anyone who attended it." He glared at Shindou in suspicion. Shindou wasn't looking at Touya, though, instead continuing to leaf through the pages. Touya frowned and looked at Detective Amano, who shrugged.

"Shindou-san reported a missing person. He's an amateur mathematician. He called us today and reported that his collaborator, a ..." --here Amano consulted his notes-- "Fujiwarano Sai, was missing."

"I've never heard of either of them," Touya said, "and I know all the Japanese mathematicians working on this problem. Unless neither of you have published anything yet?"

The last sentence was directed at Shindou, who was now rearranging the papers in his hand. Touya narrowed his eyes again, and stepped forward towards Shindou, reaching out once more. "Please return them now."

"Just a moment," Shindou said, shuffling two pages and placing them on top. He flipped through them quickly, and then nodded. "Alright, all done. Here you are. I'm sorry I read through them, but they were interesting. Now, Detective Amano, if I--"

"Wait," Touya said, interrupting Shindou. Touya was looking at his notes, his hands shaking a little. "You rearranged them."

"Did I make a mistake?" Shindou said, and he looked contrite. "I'm sorry. I thought that was how it was supposed to go. Can you put it back together again?"

"No," Touya said, looking up at Shindou in angry confusion. "You put them together in the right order. Perfectly. Have you seen these somewhere before?"

"Sai explained them to me last month," Shindou said, looking sad. "He was exploring elliptic symmetries and superimposing them on fractals, and teaching me so I could help him. You're working along similar lines, only you're using geometry instead of fractals. It's easier for me to understand than what Sai was doing, though."

Touya looked as if he'd swallowed something the wrong way. Detective Amano, sensing trouble, cleared his throat hurriedly. "Ah, Shindou-san ... perhaps if you come with us to the station, we can fill out a report there."

"Station?" Shindou looked up, and then blinked blankly. After a few moments of silence, though, he seemed to remember where he was. A look of horror came over his face, and he began to stammer. "Ah, er ... ah, I, er, that is, I ... oh no, it's late, I have to go to a meeting, can I do that tomorrow?"

Detective Amano and his partner exchanged glances, and Touya's eyes narrowed to slits.

"Oh, it's, er, it's very important. I have to be there, or ... er ... well, I have to be there, I can't miss it, and you have to leave now so that I can go out." Shindou walked to the door, opening it and looking expectantly at them. "Please," Shindou said, "leave."

"But ... what about Fujiwarano-san?" Detective Amano asked, a look of confusion on his face.

"He'll come back, I'm sure. You're right, I must have been jumping to conclusions. I'm really sorry to have bothered you. Now ... er, yes, please leave."

Detective Amano gaped. Exchanging another look with his partner, he said, "You're sure you don't need help from the police?"

"Yes, quite sure," Shindou said, nodding. "Sai will be back tomorrow, and he'll probably laugh at me for calling you. Oh, he'll definitely laugh, and he'll probably be mad because I worried other people over him, so, er ... um, I'd appreciate if you didn't tell him and just forgot about this, okay? Just leave, okay?"

In a moment, Detective Amano found himself outside the apartment, partner and Touya beside him, and Shindou closing the door in their faces. "There's something going on here," Detective Amano said uneasily.

"There is," Touya said, still glaring at the closed door. "I want to meet this Sai."

Notes on the mathematics references:
In May 1900, one of the greatest mathematicians of all time, David Hilbert of Germany, gave a famous lecture in Paris in which he laid out 23 extremely challenging problems for mathematicians of the 20th century. The 12th one was a question about generating Abelian fields. Patterns generated by elliptic curves provide a very efficient way to encode and decode information. Such encryptions are small and fast to calculate, so they are ideal for quick transactions with credit cards, ATMs and online shopping. For more information, please see the science.ca profile of Henri Damon ("The Science" tab), as well as Abelian fields and elliptic curves on Wikipedia or any good layman's mathematical reference.